pdf/instance.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "pdf/instance.h"
   6
   7 #include <algorithm>  // for min()
   8 #define _USE_MATH_DEFINES  // for M_PI
   9 #include <cmath>      // for log() and pow()
  10 #include <math.h>
  11 #include <list>
  12
  13 #include "base/json/json_reader.h"
  14 #include "base/json/json_writer.h"
  15 #include "base/logging.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_split.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/values.h"
  20 #include "chrome/browser/chrome_page_zoom_constants.h"
  21 #include "chrome/common/content_restriction.h"
  22 #include "content/public/common/page_zoom.h"
  23 #include "net/base/escape.h"
  24 #include "pdf/draw_utils.h"
  25 #include "pdf/number_image_generator.h"
  26 #include "pdf/pdf.h"
  27 #include "pdf/resource_consts.h"
  28 #include "ppapi/c/dev/ppb_cursor_control_dev.h"
  29 #include "ppapi/c/pp_errors.h"
  30 #include "ppapi/c/pp_rect.h"
  31 #include "ppapi/c/private/ppp_pdf.h"
  32 #include "ppapi/c/trusted/ppb_url_loader_trusted.h"
  33 #include "ppapi/cpp/core.h"
  34 #include "ppapi/cpp/dev/font_dev.h"
  35 #include "ppapi/cpp/dev/memory_dev.h"
  36 #include "ppapi/cpp/dev/text_input_dev.h"
  37 #include "ppapi/cpp/module.h"
  38 #include "ppapi/cpp/point.h"
  39 #include "ppapi/cpp/private/pdf.h"
  40 #include "ppapi/cpp/rect.h"
  41 #include "ppapi/cpp/resource.h"
  42 #include "ppapi/cpp/url_request_info.h"
  43 #include "ui/events/keycodes/keyboard_codes.h"
  44
  45 #if defined(OS_MACOSX)
  46 #include "base/mac/mac_util.h"
  47 #endif
  48
  49 namespace chrome_pdf {
  50
  51 struct ToolbarButtonInfo {
  52   uint32 id;
  53   Button::ButtonStyle style;
  54   PP_ResourceImage normal;
  55   PP_ResourceImage highlighted;
  56   PP_ResourceImage pressed;
  57 };
  58
  59 namespace {
  60
  61 // Uncomment following #define to enable thumbnails.
  62 // #define ENABLE_THUMBNAILS
  63
  64 const uint32 kToolbarSplashTimeoutMs = 6000;
  65 const uint32 kMessageTextColor = 0xFF575757;
  66 const uint32 kMessageTextSize = 22;
  67 const uint32 kProgressFadeTimeoutMs = 250;
  68 const uint32 kProgressDelayTimeoutMs = 1000;
  69 const uint32 kAutoScrollTimeoutMs = 50;
  70 const double kAutoScrollFactor = 0.2;
  71
  72 // Javascript methods.
  73 const char kJSAccessibility[] = "accessibility";
  74 const char kJSDocumentLoadComplete[] = "documentLoadComplete";
  75 const char kJSGetHeight[] = "getHeight";
  76 const char kJSGetHorizontalScrollbarThickness[] =
  77     "getHorizontalScrollbarThickness";
  78 const char kJSGetPageLocationNormalized[] = "getPageLocationNormalized";
  79 const char kJSGetVerticalScrollbarThickness[] = "getVerticalScrollbarThickness";
  80 const char kJSGetWidth[] = "getWidth";
  81 const char kJSGetZoomLevel[] = "getZoomLevel";
  82 const char kJSGoToPage[] = "goToPage";
  83 const char kJSGrayscale[] = "grayscale";
  84 const char kJSLoadPreviewPage[] = "loadPreviewPage";
  85 const char kJSOnLoad[] = "onload";
  86 const char kJSOnPluginSizeChanged[] = "onPluginSizeChanged";
  87 const char kJSOnScroll[] = "onScroll";
  88 const char kJSPageXOffset[] = "pageXOffset";
  89 const char kJSPageYOffset[] = "pageYOffset";
  90 const char kJSPrintPreviewPageCount[] = "printPreviewPageCount";
  91 const char kJSReload[] = "reload";
  92 const char kJSRemovePrintButton[] = "removePrintButton";
  93 const char kJSResetPrintPreviewUrl[] = "resetPrintPreviewUrl";
  94 const char kJSSendKeyEvent[] = "sendKeyEvent";
  95 const char kJSSetPageNumbers[] = "setPageNumbers";
  96 const char kJSSetPageXOffset[] = "setPageXOffset";
  97 const char kJSSetPageYOffset[] = "setPageYOffset";
  98 const char kJSSetZoomLevel[] = "setZoomLevel";
  99 const char kJSZoomFitToHeight[] = "fitToHeight";
 100 const char kJSZoomFitToWidth[] = "fitToWidth";
 101 const char kJSZoomIn[] = "zoomIn";
 102 const char kJSZoomOut[] = "zoomOut";
 103
 104 // URL reference parameters.
 105 // For more possible parameters, see RFC 3778 and the "PDF Open Parameters"
 106 // document from Adobe.
 107 const char kDelimiters[] = "#&";
 108 const char kNamedDest[] = "nameddest";
 109 const char kPage[] = "page";
 110
 111 const char kChromePrint[] = "chrome://print/";
 112
 113 // Dictionary Value key names for the document accessibility info
 114 const char kAccessibleNumberOfPages[] = "numberOfPages";
 115 const char kAccessibleLoaded[] = "loaded";
 116 const char kAccessibleCopyable[] = "copyable";
 117
 118 const ToolbarButtonInfo kPDFToolbarButtons[] = {
 119   { kFitToPageButtonId, Button::BUTTON_STATE,
 120       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 121       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 122       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 123   { kFitToWidthButtonId, Button::BUTTON_STATE,
 124       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 125       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 126       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 127   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 128       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 129       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 130       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 131   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 132       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
 133       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
 134       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
 135   { kSaveButtonId, Button::BUTTON_CLICKABLE,
 136       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
 137       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
 138       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
 139   { kPrintButtonId, Button::BUTTON_CLICKABLE,
 140       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT,
 141       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_HOVER,
 142       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_PRESSED },
 143 };
 144
 145 const ToolbarButtonInfo kPDFNoPrintToolbarButtons[] = {
 146   { kFitToPageButtonId, Button::BUTTON_STATE,
 147       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 148       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 149       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 150   { kFitToWidthButtonId, Button::BUTTON_STATE,
 151       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 152       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 153       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 154   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 155       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 156       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 157       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 158   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 159       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
 160       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
 161       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
 162   { kSaveButtonId, Button::BUTTON_CLICKABLE,
 163       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
 164       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
 165       PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
 166   { kPrintButtonId, Button::BUTTON_CLICKABLE,
 167       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
 168       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
 169       PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED }
 170 };
 171
 172 const ToolbarButtonInfo kPrintPreviewToolbarButtons[] = {
 173   { kFitToPageButtonId, Button::BUTTON_STATE,
 174       PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
 175       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
 176       PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
 177   { kFitToWidthButtonId, Button::BUTTON_STATE,
 178       PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
 179       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
 180       PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
 181   { kZoomOutButtonId, Button::BUTTON_CLICKABLE,
 182       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
 183       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
 184       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
 185   { kZoomInButtonId, Button::BUTTON_CLICKABLE,
 186       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END,
 187       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_HOVER,
 188       PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_PRESSED },
 189 };
 190
 191 static const char kPPPPdfInterface[] = PPP_PDF_INTERFACE_1;
 192
 193 PP_Var GetLinkAtPosition(PP_Instance instance, PP_Point point) {
 194   pp::Var var;
 195   void* object =
 196       pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
 197   if (object)
 198     var = static_cast<Instance*>(object)->GetLinkAtPosition(pp::Point(point));
 199   return var.Detach();
 200 }
 201
 202 void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
 203   void* object =
 204       pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
 205   if (object) {
 206     Instance* obj_instance = static_cast<Instance*>(object);
 207     switch (type) {
 208       case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW:
 209         obj_instance->RotateClockwise();
 210         break;
 211       case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW:
 212         obj_instance->RotateCounterclockwise();
 213         break;
 214     }
 215   }
 216 }
 217
 218 const PPP_Pdf ppp_private = {
 219   &GetLinkAtPosition,
 220   &Transform
 221 };
 222
 223 int ExtractPrintPreviewPageIndex(const std::string& src_url) {
 224   // Sample |src_url| format: chrome://print/id/page_index/print.pdf
 225   std::vector<std::string> url_substr;
 226   base::SplitString(src_url.substr(strlen(kChromePrint)), '/', &url_substr);
 227   if (url_substr.size() != 3)
 228     return -1;
 229
 230   if (url_substr[2] != "print.pdf")
 231     return -1;
 232
 233   int page_index = 0;
 234   if (!base::StringToInt(url_substr[1], &page_index))
 235     return -1;
 236   return page_index;
 237 }
 238
 239 bool IsPrintPreviewUrl(const std::string& url) {
 240   return url.substr(0, strlen(kChromePrint)) == kChromePrint;
 241 }
 242
 243 void ScalePoint(float scale, pp::Point* point) {
 244   point->set_x(static_cast<int>(point->x() * scale));
 245   point->set_y(static_cast<int>(point->y() * scale));
 246 }
 247
 248 void ScaleRect(float scale, pp::Rect* rect) {
 249   int left = static_cast<int>(floorf(rect->x() * scale));
 250   int top = static_cast<int>(floorf(rect->y() * scale));
 251   int right = static_cast<int>(ceilf((rect->x() + rect->width()) * scale));
 252   int bottom = static_cast<int>(ceilf((rect->y() + rect->height()) * scale));
 253   rect->SetRect(left, top, right - left, bottom - top);
 254 }
 255
 256 template<class T>
 257 T ClipToRange(T value, T lower_boundary, T upper_boundary) {
 258   DCHECK(lower_boundary <= upper_boundary);
 259   return std::max<T>(lower_boundary, std::min<T>(value, upper_boundary));
 260 }
 261
 262 }  // namespace
 263
 264 Instance::Instance(PP_Instance instance)
 265     : pp::InstancePrivate(instance),
 266       pp::Find_Private(this),
 267       pp::Printing_Dev(this),
 268       pp::Selection_Dev(this),
 269       pp::WidgetClient_Dev(this),
 270       pp::Zoom_Dev(this),
 271       cursor_(PP_CURSORTYPE_POINTER),
 272       timer_pending_(false),
 273       current_timer_id_(0),
 274       zoom_(1.0),
 275       device_scale_(1.0),
 276       printing_enabled_(true),
 277       hidpi_enabled_(false),
 278       full_(IsFullFrame()),
 279       zoom_mode_(full_ ? ZOOM_AUTO : ZOOM_SCALE),
 280       did_call_start_loading_(false),
 281       is_autoscroll_(false),
 282       scrollbar_thickness_(-1),
 283       scrollbar_reserved_thickness_(-1),
 284       current_tb_info_(NULL),
 285       current_tb_info_size_(0),
 286       paint_manager_(this, this, true),
 287       delayed_progress_timer_id_(0),
 288       first_paint_(true),
 289       painted_first_page_(false),
 290       show_page_indicator_(false),
 291       document_load_state_(LOAD_STATE_LOADING),
 292       preview_document_load_state_(LOAD_STATE_COMPLETE),
 293       told_browser_about_unsupported_feature_(false),
 294       print_preview_page_count_(0) {
 295   loader_factory_.Initialize(this);
 296   timer_factory_.Initialize(this);
 297   form_factory_.Initialize(this);
 298   print_callback_factory_.Initialize(this);
 299   engine_.reset(PDFEngine::Create(this));
 300   pp::Module::Get()->AddPluginInterface(kPPPPdfInterface, &ppp_private);
 301   AddPerInstanceObject(kPPPPdfInterface, this);
 302
 303   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
 304   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_WHEEL);
 305   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
 306   RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_TOUCH);
 307 }
 308
 309 Instance::~Instance() {
 310   RemovePerInstanceObject(kPPPPdfInterface, this);
 311 }
 312
 313 bool Instance::Init(uint32_t argc, const char* argn[], const char* argv[]) {
 314   // For now, we hide HiDPI support behind a flag.
 315   if (pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_HIDPI))
 316     hidpi_enabled_ = true;
 317
 318   printing_enabled_ = pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_PRINTING);
 319   if (printing_enabled_) {
 320     CreateToolbar(kPDFToolbarButtons, arraysize(kPDFToolbarButtons));
 321   } else {
 322     CreateToolbar(kPDFNoPrintToolbarButtons,
 323                   arraysize(kPDFNoPrintToolbarButtons));
 324   }
 325
 326   CreateProgressBar();
 327
 328   // Load autoscroll anchor image.
 329   autoscroll_anchor_ =
 330       CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
 331
 332 #ifdef ENABLE_THUMBNAILS
 333   CreateThumbnails();
 334 #endif
 335   const char* url = NULL;
 336   for (uint32_t i = 0; i < argc; ++i) {
 337     if (strcmp(argn[i], "src") == 0) {
 338       url = argv[i];
 339       break;
 340     }
 341   }
 342
 343   if (!url)
 344     return false;
 345
 346   CreatePageIndicator(IsPrintPreviewUrl(url));
 347
 348   if (!full_) {
 349     // For PDFs embedded in a frame, we don't get the data automatically like we
 350     // do for full-frame loads.  Start loading the data manually.
 351     LoadUrl(url);
 352   }
 353
 354   ZoomLimitsChanged(kMinZoom, kMaxZoom);
 355
 356   text_input_.reset(new pp::TextInput_Dev(this));
 357
 358   url_ = url;
 359   return engine_->New(url);
 360 }
 361
 362 bool Instance::HandleDocumentLoad(const pp::URLLoader& loader) {
 363   delayed_progress_timer_id_ = ScheduleTimer(kProgressBarId,
 364                                              kProgressDelayTimeoutMs);
 365   return engine_->HandleDocumentLoad(loader);
 366 }
 367
 368 bool Instance::HandleInputEvent(const pp::InputEvent& event) {
 369   // To simplify things, convert the event into device coordinates if it is
 370   // a mouse event.
 371   pp::InputEvent event_device_res(event);
 372   {
 373     pp::MouseInputEvent mouse_event(event);
 374     if (!mouse_event.is_null()) {
 375       pp::Point point = mouse_event.GetPosition();
 376       pp::Point movement = mouse_event.GetMovement();
 377       ScalePoint(device_scale_, &point);
 378       ScalePoint(device_scale_, &movement);
 379       mouse_event = pp::MouseInputEvent(
 380           this,
 381           event.GetType(),
 382           event.GetTimeStamp(),
 383           event.GetModifiers(),
 384           mouse_event.GetButton(),
 385           point,
 386           mouse_event.GetClickCount(),
 387           movement);
 388       event_device_res = mouse_event;
 389     }
 390   }
 391
 392   // Check if we need to go to autoscroll mode.
 393   if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
 394      (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN)) {
 395     pp::MouseInputEvent mouse_event(event_device_res);
 396     pp::Point pos = mouse_event.GetPosition();
 397     EnableAutoscroll(pos);
 398     UpdateCursor(CalculateAutoscroll(pos));
 399     return true;
 400   } else {
 401     // Quit autoscrolling on any other event.
 402     DisableAutoscroll();
 403   }
 404
 405 #ifdef ENABLE_THUMBNAILS
 406   if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE)
 407     thumbnails_.SlideOut();
 408
 409   if (thumbnails_.HandleEvent(event_device_res))
 410     return true;
 411 #endif
 412
 413   if (toolbar_->HandleEvent(event_device_res))
 414     return true;
 415
 416 #ifdef ENABLE_THUMBNAILS
 417   if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE) {
 418     pp::MouseInputEvent mouse_event(event);
 419     pp::Point pt = mouse_event.GetPosition();
 420     pp::Rect v_scrollbar_rc;
 421     v_scrollbar_->GetLocation(&v_scrollbar_rc);
 422     // There is a bug (https://bugs.webkit.org/show_bug.cgi?id=45208)
 423     // in the webkit that makes event.u.mouse.button
 424     // equal to PP_INPUTEVENT_MOUSEBUTTON_LEFT, even when no button is pressed.
 425     // To work around this issue we use modifier for now, and will switch
 426     // to button once the bug is fixed and webkit got merged back to our tree.
 427     if (v_scrollbar_rc.Contains(pt) &&
 428         (event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN)) {
 429       thumbnails_.SlideIn();
 430     }
 431
 432     // When scrollbar is in the scrolling mode we should display thumbnails
 433     // even the mouse is outside the thumbnail and scrollbar areas.
 434     // If mouse is outside plugin area, we are still getting mouse move events
 435     // while scrolling. See bug description for details:
 436     // http://code.google.com/p/chromium/issues/detail?id=56444
 437     if (!v_scrollbar_rc.Contains(pt) && thumbnails_.visible() &&
 438         !(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN) &&
 439         !thumbnails_.rect().Contains(pt)) {
 440       thumbnails_.SlideOut();
 441     }
 442   }
 443 #endif
 444
 445   // Need to pass the event to the engine first, since if we're over an edit
 446   // control we want it to get keyboard events (like space) instead of the
 447   // scrollbar.
 448   // TODO: will have to offset the mouse coordinates once we support bidi and
 449   // there could be scrollbars on the left.
 450   pp::InputEvent offset_event(event_device_res);
 451   bool try_engine_first = true;
 452   switch (offset_event.GetType()) {
 453     case PP_INPUTEVENT_TYPE_MOUSEDOWN:
 454     case PP_INPUTEVENT_TYPE_MOUSEUP:
 455     case PP_INPUTEVENT_TYPE_MOUSEMOVE:
 456     case PP_INPUTEVENT_TYPE_MOUSEENTER:
 457     case PP_INPUTEVENT_TYPE_MOUSELEAVE: {
 458       pp::MouseInputEvent mouse_event(event_device_res);
 459       pp::MouseInputEvent mouse_event_dip(event);
 460       pp::Point point = mouse_event.GetPosition();
 461       point.set_x(point.x() - available_area_.x());
 462       offset_event = pp::MouseInputEvent(
 463           this,
 464           event.GetType(),
 465           event.GetTimeStamp(),
 466           event.GetModifiers(),
 467           mouse_event.GetButton(),
 468           point,
 469           mouse_event.GetClickCount(),
 470           mouse_event.GetMovement());
 471       if (!engine_->IsSelecting()) {
 472         if (!IsOverlayScrollbar() &&
 473             !available_area_.Contains(mouse_event.GetPosition())) {
 474           try_engine_first = false;
 475         } else if (IsOverlayScrollbar()) {
 476           pp::Rect temp;
 477           if ((v_scrollbar_.get() && v_scrollbar_->GetLocation(&temp) &&
 478               temp.Contains(mouse_event_dip.GetPosition())) ||
 479               (h_scrollbar_.get() && h_scrollbar_->GetLocation(&temp) &&
 480               temp.Contains(mouse_event_dip.GetPosition()))) {
 481             try_engine_first = false;
 482           }
 483         }
 484       }
 485       break;
 486     }
 487     default:
 488       break;
 489   }
 490   if (try_engine_first && engine_->HandleEvent(offset_event))
 491     return true;
 492
 493   // Left/Right arrows should scroll to the beginning of the Prev/Next page if
 494   // there is no horizontal scroll bar.
 495   // If fit-to-height, PgDown/PgUp should scroll to the beginning of the
 496   // Prev/Next page.
 497   if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN) {
 498     pp::KeyboardInputEvent keyboard_event(event);
 499     bool page_down =
 500         (!h_scrollbar_.get() &&
 501             keyboard_event.GetKeyCode() == ui::VKEY_RIGHT) ||
 502         (zoom_mode_ == ZOOM_FIT_TO_PAGE &&
 503             keyboard_event.GetKeyCode() == ui::VKEY_NEXT);
 504     bool page_up =
 505         (!h_scrollbar_.get() &&
 506             keyboard_event.GetKeyCode() == ui::VKEY_LEFT) ||
 507         (zoom_mode_ == ZOOM_FIT_TO_PAGE &&
 508             keyboard_event.GetKeyCode() == ui::VKEY_PRIOR);
 509
 510     if (page_down) {
 511       int page = engine_->GetFirstVisiblePage();
 512       // Engine calculates visible page including delimiter to the page size.
 513       // We need to check here if the page itself is completely out of view and
 514       // scroll to the next one in that case.
 515       if (engine_->GetPageRect(page).bottom() * zoom_ <=
 516           v_scrollbar_->GetValue())
 517         page++;
 518       ScrollToPage(page + 1);
 519       UpdateCursor(PP_CURSORTYPE_POINTER);
 520       return true;
 521     } else if (page_up) {
 522       int page = engine_->GetFirstVisiblePage();
 523       if (engine_->GetPageRect(page).y() * zoom_ >= v_scrollbar_->GetValue())
 524         page--;
 525       ScrollToPage(page);
 526       UpdateCursor(PP_CURSORTYPE_POINTER);
 527       return true;
 528     }
 529   }
 530
 531   if (v_scrollbar_.get() && v_scrollbar_->HandleEvent(event)) {
 532     UpdateCursor(PP_CURSORTYPE_POINTER);
 533     return true;
 534   }
 535
 536   if (h_scrollbar_.get() && h_scrollbar_->HandleEvent(event)) {
 537     UpdateCursor(PP_CURSORTYPE_POINTER);
 538     return true;
 539   }
 540
 541   if (timer_pending_ &&
 542       (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEUP ||
 543        event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE)) {
 544     timer_factory_.CancelAll();
 545     timer_pending_ = false;
 546   } else if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
 547              engine_->IsSelecting()) {
 548     bool set_timer = false;
 549     pp::MouseInputEvent mouse_event(event);
 550     if (v_scrollbar_.get() &&
 551         (mouse_event.GetPosition().y() <= 0 ||
 552          mouse_event.GetPosition().y() >= (plugin_dip_size_.height() - 1))) {
 553       v_scrollbar_->ScrollBy(
 554           PP_SCROLLBY_LINE, mouse_event.GetPosition().y() >= 0 ? 1: -1);
 555       set_timer = true;
 556     }
 557     if (h_scrollbar_.get() &&
 558         (mouse_event.GetPosition().x() <= 0 ||
 559          mouse_event.GetPosition().x() >= (plugin_dip_size_.width() - 1))) {
 560       h_scrollbar_->ScrollBy(PP_SCROLLBY_LINE,
 561           mouse_event.GetPosition().x() >= 0 ? 1: -1);
 562       set_timer = true;
 563     }
 564
 565     if (set_timer) {
 566       last_mouse_event_ = pp::MouseInputEvent(event);
 567
 568       pp::CompletionCallback callback =
 569           timer_factory_.NewCallback(&Instance::OnTimerFired);
 570       pp::Module::Get()->core()->CallOnMainThread(kDragTimerMs, callback);
 571       timer_pending_ = true;
 572     }
 573   }
 574
 575   if (event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN &&
 576       event.GetModifiers() & kDefaultKeyModifier) {
 577     pp::KeyboardInputEvent keyboard_event(event);
 578     switch (keyboard_event.GetKeyCode()) {
 579       case 'A':
 580         engine_->SelectAll();
 581         return true;
 582     }
 583   }
 584
 585   // Return true for unhandled clicks so the plugin takes focus.
 586   return (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN);
 587 }
 588
 589 void Instance::DidChangeView(const pp::View& view) {
 590   pp::Rect view_rect(view.GetRect());
 591   float device_scale = 1.0f;
 592   float old_device_scale = device_scale_;
 593   if (hidpi_enabled_)
 594     device_scale = view.GetDeviceScale();
 595   pp::Size view_device_size(view_rect.width() * device_scale,
 596                             view_rect.height() * device_scale);
 597   if (view_device_size == plugin_size_ && device_scale == device_scale_)
 598     return;  // We don't care about the position, only the size.
 599
 600   image_data_ = pp::ImageData();
 601   device_scale_ = device_scale;
 602   plugin_dip_size_ = view_rect.size();
 603   plugin_size_ = view_device_size;
 604
 605   paint_manager_.SetSize(view_device_size, device_scale_);
 606
 607   image_data_ = pp::ImageData(this,
 608                               PP_IMAGEDATAFORMAT_BGRA_PREMUL,
 609                               plugin_size_,
 610                               false);
 611   if (image_data_.is_null()) {
 612     DCHECK(plugin_size_.IsEmpty());
 613     return;
 614   }
 615
 616   // View dimensions changed, disable autoscroll (if it was enabled).
 617   DisableAutoscroll();
 618
 619   OnGeometryChanged(zoom_, old_device_scale);
 620 }
 621
 622 pp::Var Instance::GetInstanceObject() {
 623   if (instance_object_.is_undefined()) {
 624     PDFScriptableObject* object = new PDFScriptableObject(this);
 625     // The pp::Var takes ownership of object here.
 626     instance_object_ = pp::VarPrivate(this, object);
 627   }
 628
 629   return instance_object_;
 630 }
 631
 632 pp::Var Instance::GetLinkAtPosition(const pp::Point& point) {
 633   pp::Point offset_point(point);
 634   ScalePoint(device_scale_, &offset_point);
 635   offset_point.set_x(offset_point.x() - available_area_.x());
 636   return engine_->GetLinkAtPosition(offset_point);
 637 }
 638
 639 pp::Var Instance::GetSelectedText(bool html) {
 640   if (html || !engine_->HasPermission(PDFEngine::PERMISSION_COPY))
 641     return pp::Var();
 642   return engine_->GetSelectedText();
 643 }
 644
 645 void Instance::InvalidateWidget(pp::Widget_Dev widget,
 646                                 const pp::Rect& dirty_rect) {
 647   if (v_scrollbar_.get() && *v_scrollbar_ == widget) {
 648     if (!image_data_.is_null())
 649       v_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
 650   } else if (h_scrollbar_.get() && *h_scrollbar_ == widget) {
 651     if (!image_data_.is_null())
 652       h_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
 653   } else {
 654     // Possible to hit this condition since sometimes the scrollbar codes posts
 655     // a task to do something later, and we could have deleted our reference in
 656     // the meantime.
 657     return;
 658   }
 659
 660   pp::Rect dirty_rect_scaled = dirty_rect;
 661   ScaleRect(device_scale_, &dirty_rect_scaled);
 662   paint_manager_.InvalidateRect(dirty_rect_scaled);
 663 }
 664
 665 void Instance::ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
 666                                      uint32_t value) {
 667   value = GetScaled(value);
 668   if (v_scrollbar_.get() && *v_scrollbar_ == scrollbar) {
 669     engine_->ScrolledToYPosition(value);
 670     pp::Rect rc;
 671     v_scrollbar_->GetLocation(&rc);
 672     int32 doc_height = GetDocumentPixelHeight();
 673     doc_height -= GetScaled(rc.height());
 674 #ifdef ENABLE_THUMBNAILS
 675     if (thumbnails_.visible()) {
 676       thumbnails_.SetPosition(value, doc_height, true);
 677     }
 678 #endif
 679     pp::Point origin(
 680         plugin_size_.width() - page_indicator_.rect().width() -
 681             GetScaled(GetScrollbarReservedThickness()),
 682         page_indicator_.GetYPosition(value, doc_height, plugin_size_.height()));
 683     page_indicator_.MoveTo(origin, page_indicator_.visible());
 684   } else if (h_scrollbar_.get() && *h_scrollbar_ == scrollbar) {
 685     engine_->ScrolledToXPosition(value);
 686   }
 687 }
 688
 689 void Instance::ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
 690                                        bool overlay) {
 691   scrollbar_reserved_thickness_ = overlay ? 0 : scrollbar_thickness_;
 692   OnGeometryChanged(zoom_, device_scale_);
 693 }
 694
 695 uint32_t Instance::QuerySupportedPrintOutputFormats() {
 696   return engine_->QuerySupportedPrintOutputFormats();
 697 }
 698
 699 int32_t Instance::PrintBegin(const PP_PrintSettings_Dev& print_settings) {
 700   // For us num_pages is always equal to the number of pages in the PDF
 701   // document irrespective of the printable area.
 702   int32_t ret = engine_->GetNumberOfPages();
 703   if (!ret)
 704     return 0;
 705
 706   uint32_t supported_formats = engine_->QuerySupportedPrintOutputFormats();
 707   if ((print_settings.format & supported_formats) == 0)
 708     return 0;
 709
 710   print_settings_.is_printing = true;
 711   print_settings_.pepper_print_settings = print_settings;
 712   engine_->PrintBegin();
 713   return ret;
 714 }
 715
 716 pp::Resource Instance::PrintPages(
 717     const PP_PrintPageNumberRange_Dev* page_ranges,
 718     uint32_t page_range_count) {
 719   if (!print_settings_.is_printing)
 720     return pp::Resource();
 721
 722   print_settings_.print_pages_called_ = true;
 723   return engine_->PrintPages(page_ranges, page_range_count,
 724                              print_settings_.pepper_print_settings);
 725 }
 726
 727 void Instance::PrintEnd() {
 728   if (print_settings_.print_pages_called_)
 729     UserMetricsRecordAction("PDF.PrintPage");
 730   print_settings_.Clear();
 731   engine_->PrintEnd();
 732 }
 733
 734 bool Instance::IsPrintScalingDisabled() {
 735   return !engine_->GetPrintScaling();
 736 }
 737
 738 bool Instance::StartFind(const std::string& text, bool case_sensitive) {
 739   engine_->StartFind(text.c_str(), case_sensitive);
 740   return true;
 741 }
 742
 743 void Instance::SelectFindResult(bool forward) {
 744   engine_->SelectFindResult(forward);
 745 }
 746
 747 void Instance::StopFind() {
 748   engine_->StopFind();
 749 }
 750
 751 void Instance::Zoom(double scale, bool text_only) {
 752   UserMetricsRecordAction("PDF.ZoomFromBrowser");
 753   SetZoom(ZOOM_SCALE, scale);
 754 }
 755
 756 void Instance::ZoomChanged(double factor) {
 757   if (full_)
 758     Zoom_Dev::ZoomChanged(factor);
 759 }
 760
 761 void Instance::OnPaint(const std::vector<pp::Rect>& paint_rects,
 762                        std::vector<PaintManager::ReadyRect>* ready,
 763                        std::vector<pp::Rect>* pending) {
 764   if (image_data_.is_null()) {
 765     DCHECK(plugin_size_.IsEmpty());
 766     return;
 767   }
 768   if (first_paint_) {
 769     first_paint_ = false;
 770     pp::Rect rect = pp::Rect(pp::Point(), plugin_size_);
 771     FillRect(rect, kBackgroundColor);
 772     ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
 773     *pending = paint_rects;
 774     return;
 775   }
 776
 777   engine_->PrePaint();
 778
 779   for (size_t i = 0; i < paint_rects.size(); i++) {
 780     // Intersect with plugin area since there could be pending invalidates from
 781     // when the plugin area was larger.
 782     pp::Rect rect =
 783         paint_rects[i].Intersect(pp::Rect(pp::Point(), plugin_size_));
 784     if (rect.IsEmpty())
 785       continue;
 786
 787     pp::Rect pdf_rect = available_area_.Intersect(rect);
 788     if (!pdf_rect.IsEmpty()) {
 789       pdf_rect.Offset(available_area_.x() * -1, 0);
 790
 791       std::vector<pp::Rect> pdf_ready;
 792       std::vector<pp::Rect> pdf_pending;
 793       engine_->Paint(pdf_rect, &image_data_, &pdf_ready, &pdf_pending);
 794       for (size_t j = 0; j < pdf_ready.size(); ++j) {
 795         pdf_ready[j].Offset(available_area_.point());
 796         ready->push_back(
 797             PaintManager::ReadyRect(pdf_ready[j], image_data_, false));
 798       }
 799       for (size_t j = 0; j < pdf_pending.size(); ++j) {
 800         pdf_pending[j].Offset(available_area_.point());
 801         pending->push_back(pdf_pending[j]);
 802       }
 803     }
 804
 805     for (size_t j = 0; j < background_parts_.size(); ++j) {
 806       pp::Rect intersection = background_parts_[j].location.Intersect(rect);
 807       if (!intersection.IsEmpty()) {
 808         FillRect(intersection, background_parts_[j].color);
 809         ready->push_back(
 810             PaintManager::ReadyRect(intersection, image_data_, false));
 811       }
 812     }
 813
 814     if (document_load_state_ == LOAD_STATE_FAILED) {
 815       pp::Point top_center;
 816       top_center.set_x(plugin_size_.width() / 2);
 817       top_center.set_y(plugin_size_.height() / 2);
 818       DrawText(top_center, PP_RESOURCESTRING_PDFLOAD_FAILED);
 819     }
 820
 821 #ifdef ENABLE_THUMBNAILS
 822     thumbnails_.Paint(&image_data_, rect);
 823 #endif
 824   }
 825
 826   engine_->PostPaint();
 827
 828   // Must paint scrollbars after the background parts, in case we have an
 829   // overlay scrollbar that's over the background. We also do this in a separate
 830   // loop because the scrollbar painting logic uses the signal of whether there
 831   // are pending paints or not to figure out if it should draw right away or
 832   // not.
 833   for (size_t i = 0; i < paint_rects.size(); i++) {
 834     PaintIfWidgetIntersects(h_scrollbar_.get(), paint_rects[i], ready, pending);
 835     PaintIfWidgetIntersects(v_scrollbar_.get(), paint_rects[i], ready, pending);
 836   }
 837
 838   if (progress_bar_.visible())
 839     PaintOverlayControl(&progress_bar_, &image_data_, ready);
 840
 841   if (page_indicator_.visible())
 842     PaintOverlayControl(&page_indicator_, &image_data_, ready);
 843
 844   if (toolbar_->current_transparency() != kTransparentAlpha)
 845     PaintOverlayControl(toolbar_.get(), &image_data_, ready);
 846
 847   // Paint autoscroll anchor if needed.
 848   if (is_autoscroll_) {
 849     size_t limit = ready->size();
 850     for (size_t i = 0; i < limit; i++) {
 851       pp::Rect anchor_rect = autoscroll_rect_.Intersect((*ready)[i].rect);
 852       if (!anchor_rect.IsEmpty()) {
 853         pp::Rect draw_rc = pp::Rect(
 854             pp::Point(anchor_rect.x() - autoscroll_rect_.x(),
 855                       anchor_rect.y() - autoscroll_rect_.y()),
 856             anchor_rect.size());
 857         // Paint autoscroll anchor.
 858         AlphaBlend(autoscroll_anchor_, draw_rc,
 859                    &image_data_, anchor_rect.point(), kOpaqueAlpha);
 860       }
 861     }
 862   }
 863 }
 864
 865 void Instance::PaintOverlayControl(
 866     Control* ctrl,
 867     pp::ImageData* image_data,
 868     std::vector<PaintManager::ReadyRect>* ready) {
 869   // Make sure that we only paint overlay controls over an area that's ready,
 870   // i.e. not pending.  Otherwise we'll mark the control rect as ready and
 871   // it'll overwrite the pdf region.
 872   std::list<pp::Rect> ctrl_rects;
 873   for (size_t i = 0; i < ready->size(); i++) {
 874     pp::Rect rc = ctrl->rect().Intersect((*ready)[i].rect);
 875     if (!rc.IsEmpty())
 876       ctrl_rects.push_back(rc);
 877   }
 878
 879   if (!ctrl_rects.empty()) {
 880     ctrl->PaintMultipleRects(image_data, ctrl_rects);
 881
 882     std::list<pp::Rect>::iterator iter;
 883     for (iter = ctrl_rects.begin(); iter != ctrl_rects.end(); ++iter) {
 884       ready->push_back(PaintManager::ReadyRect(*iter, *image_data, false));
 885     }
 886   }
 887 }
 888
 889 void Instance::DidOpen(int32_t result) {
 890   if (result == PP_OK) {
 891     engine_->HandleDocumentLoad(embed_loader_);
 892   } else if (result != PP_ERROR_ABORTED) {  // Can happen in tests.
 893     NOTREACHED();
 894   }
 895 }
 896
 897 void Instance::DidOpenPreview(int32_t result) {
 898   if (result == PP_OK) {
 899     preview_engine_.reset(PDFEngine::Create(new PreviewModeClient(this)));
 900     preview_engine_->HandleDocumentLoad(embed_preview_loader_);
 901   } else {
 902     NOTREACHED();
 903   }
 904 }
 905
 906 void Instance::PaintIfWidgetIntersects(
 907     pp::Widget_Dev* widget,
 908     const pp::Rect& rect,
 909     std::vector<PaintManager::ReadyRect>* ready,
 910     std::vector<pp::Rect>* pending) {
 911   if (!widget)
 912     return;
 913
 914   pp::Rect location;
 915   if (!widget->GetLocation(&location))
 916     return;
 917
 918   ScaleRect(device_scale_, &location);
 919   location = location.Intersect(rect);
 920   if (location.IsEmpty())
 921     return;
 922
 923   if (IsOverlayScrollbar()) {
 924     // If we're using overlay scrollbars, and there are pending paints under the
 925     // scrollbar, don't update the scrollbar instantly. While it would be nice,
 926     // we would need to double buffer the plugin area in order to make this
 927     // work. This is because we'd need to always have a copy of what the pdf
 928     // under the scrollbar looks like, and additionally we couldn't paint the
 929     // pdf under the scrollbar if it's ready until we got the preceding flush.
 930     // So in practice, it would make painting slower and introduce extra buffer
 931     // copies for the general case.
 932     for (size_t i = 0; i < pending->size(); ++i) {
 933       if ((*pending)[i].Intersects(location))
 934         return;
 935     }
 936
 937     // Even if none of the pending paints are under the scrollbar, we never want
 938     // to paint it if it's over the pdf if there are other pending paints.
 939     // Otherwise different parts of the pdf plugin would display at different
 940     // scroll offsets.
 941     if (!pending->empty() && available_area_.Intersects(rect)) {
 942       pending->push_back(location);
 943       return;
 944     }
 945   }
 946
 947   pp::Rect location_dip = location;
 948   ScaleRect(1.0f / device_scale_, &location_dip);
 949
 950   DCHECK(!image_data_.is_null());
 951   widget->Paint(location_dip, &image_data_);
 952
 953   // Re-scale the rectangle from DIPs to device pixels, so we ensure that we
 954   // don't miss any pixels due to rounding outwards in ScaleRect.
 955   location = location_dip;
 956   ScaleRect(device_scale_, &location);
 957
 958   ready->push_back(PaintManager::ReadyRect(location, image_data_, true));
 959 }
 960
 961 void Instance::OnTimerFired(int32_t) {
 962   HandleInputEvent(last_mouse_event_);
 963 }
 964
 965 void Instance::OnClientTimerFired(int32_t id) {
 966   engine_->OnCallback(id);
 967 }
 968
 969 void Instance::OnControlTimerFired(int32_t,
 970                                    const uint32& control_id,
 971                                    const uint32& timer_id) {
 972   if (control_id == toolbar_->id()) {
 973     toolbar_->OnTimerFired(timer_id);
 974   } else if (control_id == progress_bar_.id()) {
 975     if (timer_id == delayed_progress_timer_id_) {
 976       if (document_load_state_ == LOAD_STATE_LOADING &&
 977           !progress_bar_.visible()) {
 978         progress_bar_.Fade(true, kProgressFadeTimeoutMs);
 979       }
 980       delayed_progress_timer_id_ = 0;
 981     } else {
 982       progress_bar_.OnTimerFired(timer_id);
 983     }
 984   } else if (control_id == kAutoScrollId) {
 985     if (is_autoscroll_) {
 986       if (autoscroll_x_ != 0 && h_scrollbar_.get()) {
 987         h_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_x_);
 988       }
 989       if (autoscroll_y_ != 0 && v_scrollbar_.get()) {
 990         v_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_y_);
 991       }
 992
 993       // Reschedule timer.
 994       ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
 995     }
 996   } else if (control_id == kPageIndicatorId) {
 997     page_indicator_.OnTimerFired(timer_id);
 998   }
 999 #ifdef ENABLE_THUMBNAILS
1000   else if (control_id == thumbnails_.id()) {
1001     thumbnails_.OnTimerFired(timer_id);
1002   }
1003 #endif
1004 }
1005
1006 void Instance::CalculateBackgroundParts() {
1007   background_parts_.clear();
1008   int v_scrollbar_thickness =
1009       GetScaled(v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1010   int h_scrollbar_thickness =
1011       GetScaled(h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1012   int width_without_scrollbar = std::max(
1013       plugin_size_.width() - v_scrollbar_thickness, 0);
1014   int height_without_scrollbar = std::max(
1015       plugin_size_.height() - h_scrollbar_thickness, 0);
1016   int left_width = available_area_.x();
1017   int right_start = available_area_.right();
1018   int right_width = abs(width_without_scrollbar - available_area_.right());
1019   int bottom = std::min(available_area_.bottom(), height_without_scrollbar);
1020
1021   // Add the left, right, and bottom rectangles.  Note: we assume only
1022   // horizontal centering.
1023   BackgroundPart part = {
1024     pp::Rect(0, 0, left_width, bottom),
1025     kBackgroundColor
1026   };
1027   if (!part.location.IsEmpty())
1028     background_parts_.push_back(part);
1029   part.location = pp::Rect(right_start, 0, right_width, bottom);
1030   if (!part.location.IsEmpty())
1031     background_parts_.push_back(part);
1032   part.location = pp::Rect(
1033       0, bottom, width_without_scrollbar, height_without_scrollbar - bottom);
1034   if (!part.location.IsEmpty())
1035     background_parts_.push_back(part);
1036
1037   if (h_scrollbar_thickness
1038 #if defined(OS_MACOSX)
1039       ||
1040 #else
1041       &&
1042 #endif
1043       v_scrollbar_thickness) {
1044     part.color = 0xFFFFFFFF;
1045     part.location = pp::Rect(plugin_size_.width() - v_scrollbar_thickness,
1046                              plugin_size_.height() - h_scrollbar_thickness,
1047                              h_scrollbar_thickness,
1048                              v_scrollbar_thickness);
1049     background_parts_.push_back(part);
1050   }
1051 }
1052
1053 int Instance::GetDocumentPixelWidth() const {
1054   return static_cast<int>(ceil(document_size_.width() * zoom_ * device_scale_));
1055 }
1056
1057 int Instance::GetDocumentPixelHeight() const {
1058   return static_cast<int>(ceil(document_size_.height() *
1059                                zoom_ *
1060                                device_scale_));
1061 }
1062
1063 void Instance::FillRect(const pp::Rect& rect, uint32 color) {
1064   DCHECK(!image_data_.is_null() || rect.IsEmpty());
1065   uint32* buffer_start = static_cast<uint32*>(image_data_.data());
1066   int stride = image_data_.stride();
1067   uint32* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
1068   int height = rect.height();
1069   int width = rect.width();
1070   for (int y = 0; y < height; ++y) {
1071     for (int x = 0; x < width; ++x)
1072       *(ptr + x) = color;
1073     ptr += stride / 4;
1074   }
1075 }
1076
1077 void Instance::DocumentSizeUpdated(const pp::Size& size) {
1078   document_size_ = size;
1079
1080   OnGeometryChanged(zoom_, device_scale_);
1081 }
1082
1083 void Instance::Invalidate(const pp::Rect& rect) {
1084   pp::Rect offset_rect(rect);
1085   offset_rect.Offset(available_area_.point());
1086   paint_manager_.InvalidateRect(offset_rect);
1087 }
1088
1089 void Instance::Scroll(const pp::Point& point) {
1090   pp::Rect scroll_area = available_area_;
1091   if (IsOverlayScrollbar()) {
1092     pp::Rect rc;
1093     if (h_scrollbar_.get()) {
1094       h_scrollbar_->GetLocation(&rc);
1095       ScaleRect(device_scale_, &rc);
1096       if (scroll_area.bottom() > rc.y()) {
1097         scroll_area.set_height(rc.y() - scroll_area.y());
1098         paint_manager_.InvalidateRect(rc);
1099       }
1100     }
1101     if (v_scrollbar_.get()) {
1102       v_scrollbar_->GetLocation(&rc);
1103       ScaleRect(device_scale_, &rc);
1104       if (scroll_area.right() > rc.x()) {
1105         scroll_area.set_width(rc.x() - scroll_area.x());
1106         paint_manager_.InvalidateRect(rc);
1107       }
1108     }
1109   }
1110   paint_manager_.ScrollRect(scroll_area, point);
1111
1112   if (toolbar_->current_transparency() != kTransparentAlpha)
1113     paint_manager_.InvalidateRect(toolbar_->GetControlsRect());
1114
1115   if (progress_bar_.visible())
1116     paint_manager_.InvalidateRect(progress_bar_.rect());
1117
1118   if (is_autoscroll_)
1119     paint_manager_.InvalidateRect(autoscroll_rect_);
1120
1121   if (show_page_indicator_) {
1122     page_indicator_.set_current_page(GetPageNumberToDisplay());
1123     page_indicator_.Splash();
1124   }
1125
1126   if (page_indicator_.visible())
1127     paint_manager_.InvalidateRect(page_indicator_.rect());
1128
1129   if (on_scroll_callback_.is_string())
1130     ExecuteScript(on_scroll_callback_);
1131 }
1132
1133 void Instance::ScrollToX(int position) {
1134   if (!h_scrollbar_.get()) {
1135     NOTREACHED();
1136     return;
1137   }
1138   int position_dip = static_cast<int>(position / device_scale_);
1139   h_scrollbar_->SetValue(position_dip);
1140 }
1141
1142 void Instance::ScrollToY(int position) {
1143   if (!v_scrollbar_.get()) {
1144     NOTREACHED();
1145     return;
1146   }
1147   int position_dip = static_cast<int>(position / device_scale_);
1148   v_scrollbar_->SetValue(ClipToRange(position_dip, 0, valid_v_range_));
1149 }
1150
1151 void Instance::ScrollToPage(int page) {
1152   if (!v_scrollbar_.get())
1153     return;
1154
1155   if (engine_->GetNumberOfPages() == 0)
1156     return;
1157
1158   int index = ClipToRange(page, 0, engine_->GetNumberOfPages() - 1);
1159   pp::Rect rect = engine_->GetPageRect(index);
1160   // If we are trying to scroll pass the last page,
1161   // scroll to the end of the last page.
1162   int position = index < page ? rect.bottom() : rect.y();
1163   ScrollToY(position * zoom_ * device_scale_);
1164 }
1165
1166 void Instance::NavigateTo(const std::string& url, bool open_in_new_tab) {
1167   std::string url_copy(url);
1168
1169   // Empty |url_copy| is ok, and will effectively be a reload.
1170   // Skip the code below so an empty URL does not turn into "http://", which
1171   // will cause GURL to fail a DCHECK.
1172   if (!url_copy.empty()) {
1173     // If there's no scheme, add http.
1174     if (url_copy.find("://") == std::string::npos &&
1175         url_copy.find("mailto:") == std::string::npos) {
1176       url_copy = std::string("http://") + url_copy;
1177     }
1178     // Make sure |url_copy| starts with a valid scheme.
1179     if (url_copy.find("http://") != 0 &&
1180         url_copy.find("https://") != 0 &&
1181         url_copy.find("ftp://") != 0 &&
1182         url_copy.find("mailto:") != 0) {
1183       return;
1184     }
1185     // Make sure |url_copy| is not only a scheme.
1186     if (url_copy == "http://" ||
1187         url_copy == "https://" ||
1188         url_copy == "ftp://" ||
1189         url_copy == "mailto:") {
1190       return;
1191     }
1192   }
1193   if (open_in_new_tab) {
1194     GetWindowObject().Call("open", url_copy);
1195   } else {
1196     GetWindowObject().GetProperty("top").GetProperty("location").
1197         SetProperty("href", url_copy);
1198   }
1199 }
1200
1201 void Instance::UpdateCursor(PP_CursorType_Dev cursor) {
1202   if (cursor == cursor_)
1203     return;
1204   cursor_ = cursor;
1205
1206   const PPB_CursorControl_Dev* cursor_interface =
1207       reinterpret_cast<const PPB_CursorControl_Dev*>(
1208       pp::Module::Get()->GetBrowserInterface(PPB_CURSOR_CONTROL_DEV_INTERFACE));
1209   if (!cursor_interface) {
1210     NOTREACHED();
1211     return;
1212   }
1213
1214   cursor_interface->SetCursor(
1215       pp_instance(), cursor_, pp::ImageData().pp_resource(), NULL);
1216 }
1217
1218 void Instance::UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) {
1219   if (!v_scrollbar_.get())
1220     return;
1221
1222   float inverse_scale = 1.0f / device_scale_;
1223   std::vector<pp::Rect> scaled_tickmarks = tickmarks;
1224   for (size_t i = 0; i < scaled_tickmarks.size(); i++) {
1225     ScaleRect(inverse_scale, &scaled_tickmarks[i]);
1226   }
1227
1228   v_scrollbar_->SetTickMarks(
1229       scaled_tickmarks.empty() ? NULL : &scaled_tickmarks[0], tickmarks.size());
1230 }
1231
1232 void Instance::NotifyNumberOfFindResultsChanged(int total, bool final_result) {
1233   NumberOfFindResultsChanged(total, final_result);
1234 }
1235
1236 void Instance::NotifySelectedFindResultChanged(int current_find_index) {
1237   SelectedFindResultChanged(current_find_index);
1238 }
1239
1240 void Instance::OnEvent(uint32 control_id, uint32 event_id, void* data) {
1241   if (event_id == Button::EVENT_ID_BUTTON_CLICKED ||
1242       event_id == Button::EVENT_ID_BUTTON_STATE_CHANGED) {
1243     switch (control_id) {
1244       case kFitToPageButtonId:
1245         UserMetricsRecordAction("PDF.FitToPageButton");
1246         SetZoom(ZOOM_FIT_TO_PAGE, 0);
1247         ZoomChanged(zoom_);
1248         break;
1249       case kFitToWidthButtonId:
1250         UserMetricsRecordAction("PDF.FitToWidthButton");
1251         SetZoom(ZOOM_FIT_TO_WIDTH, 0);
1252         ZoomChanged(zoom_);
1253         break;
1254       case kZoomOutButtonId:
1255       case kZoomInButtonId:
1256         UserMetricsRecordAction(control_id == kZoomOutButtonId ?
1257             "PDF.ZoomOutButton" : "PDF.ZoomInButton");
1258         SetZoom(ZOOM_SCALE, CalculateZoom(control_id));
1259         ZoomChanged(zoom_);
1260         break;
1261       case kSaveButtonId:
1262         UserMetricsRecordAction("PDF.SaveButton");
1263         SaveAs();
1264         break;
1265       case kPrintButtonId:
1266         UserMetricsRecordAction("PDF.PrintButton");
1267         Print();
1268         break;
1269     }
1270   }
1271   if (control_id == kThumbnailsId &&
1272       event_id == ThumbnailControl::EVENT_ID_THUMBNAIL_SELECTED) {
1273     int page = *static_cast<int*>(data);
1274     pp::Rect page_rc(engine_->GetPageRect(page));
1275     ScrollToY(static_cast<int>(page_rc.y() * zoom_ * device_scale_));
1276   }
1277 }
1278
1279 void Instance::Invalidate(uint32 control_id, const pp::Rect& rc) {
1280   paint_manager_.InvalidateRect(rc);
1281 }
1282
1283 uint32 Instance::ScheduleTimer(uint32 control_id, uint32 timeout_ms) {
1284   current_timer_id_++;
1285   pp::CompletionCallback callback =
1286       timer_factory_.NewCallback(&Instance::OnControlTimerFired,
1287                                  control_id,
1288                                  current_timer_id_);
1289   pp::Module::Get()->core()->CallOnMainThread(timeout_ms, callback);
1290   return current_timer_id_;
1291 }
1292
1293 void Instance::SetEventCapture(uint32 control_id, bool set_capture) {
1294   // TODO(gene): set event capture here.
1295 }
1296
1297 void Instance::SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type) {
1298   UpdateCursor(cursor_type);
1299 }
1300
1301 pp::Instance* Instance::GetInstance() {
1302   return this;
1303 }
1304
1305 void Instance::GetDocumentPassword(
1306     pp::CompletionCallbackWithOutput<pp::Var> callback) {
1307   std::string message(GetLocalizedString(PP_RESOURCESTRING_PDFGETPASSWORD));
1308   pp::Var result = pp::PDF::ModalPromptForPassword(this, message);
1309   *callback.output() = result.pp_var();
1310   callback.Run(PP_OK);
1311 }
1312
1313 void Instance::Alert(const std::string& message) {
1314   GetWindowObject().Call("alert", message);
1315 }
1316
1317 bool Instance::Confirm(const std::string& message) {
1318   pp::Var result = GetWindowObject().Call("confirm", message);
1319   return result.is_bool() ? result.AsBool() : false;
1320 }
1321
1322 std::string Instance::Prompt(const std::string& question,
1323                              const std::string& default_answer) {
1324   pp::Var result = GetWindowObject().Call("prompt", question, default_answer);
1325   return result.is_string() ? result.AsString() : std::string();
1326 }
1327
1328 std::string Instance::GetURL() {
1329   return url_;
1330 }
1331
1332 void Instance::Email(const std::string& to,
1333                      const std::string& cc,
1334                      const std::string& bcc,
1335                      const std::string& subject,
1336                      const std::string& body) {
1337   std::string javascript =
1338       "var href = 'mailto:" + net::EscapeUrlEncodedData(to, false) +
1339       "?cc=" + net::EscapeUrlEncodedData(cc, false) +
1340       "&bcc=" + net::EscapeUrlEncodedData(bcc, false) +
1341       "&subject=" + net::EscapeUrlEncodedData(subject, false) +
1342       "&body=" + net::EscapeUrlEncodedData(body, false) +
1343       "';var temp = window.open(href, '_blank', " +
1344       "'width=1,height=1');if(temp) temp.close();";
1345   ExecuteScript(javascript);
1346 }
1347
1348 void Instance::Print() {
1349   if (!printing_enabled_ ||
1350       (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
1351        !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY))) {
1352     return;
1353   }
1354
1355   pp::CompletionCallback callback =
1356       print_callback_factory_.NewCallback(&Instance::OnPrint);
1357   pp::Module::Get()->core()->CallOnMainThread(0, callback);
1358 }
1359
1360 void Instance::OnPrint(int32_t) {
1361   pp::PDF::Print(this);
1362 }
1363
1364 void Instance::SaveAs() {
1365   pp::PDF::SaveAs(this);
1366 }
1367
1368 void Instance::SubmitForm(const std::string& url,
1369                           const void* data,
1370                           int length) {
1371   pp::URLRequestInfo request(this);
1372   request.SetURL(url);
1373   request.SetMethod("POST");
1374   request.AppendDataToBody(reinterpret_cast<const char*>(data), length);
1375
1376   pp::CompletionCallback callback =
1377       form_factory_.NewCallback(&Instance::FormDidOpen);
1378   form_loader_ = CreateURLLoaderInternal();
1379   int rv = form_loader_.Open(request, callback);
1380   if (rv != PP_OK_COMPLETIONPENDING)
1381     callback.Run(rv);
1382 }
1383
1384 void Instance::FormDidOpen(int32_t result) {
1385   // TODO: inform the user of success/failure.
1386   if (result != PP_OK) {
1387     NOTREACHED();
1388   }
1389 }
1390
1391 std::string Instance::ShowFileSelectionDialog() {
1392   // Seems like very low priority to implement, since the pdf has no way to get
1393   // the file data anyways.  Javascript doesn't let you do this synchronously.
1394   NOTREACHED();
1395   return std::string();
1396 }
1397
1398 pp::URLLoader Instance::CreateURLLoader() {
1399   if (full_) {
1400     if (!did_call_start_loading_) {
1401       did_call_start_loading_ = true;
1402       pp::PDF::DidStartLoading(this);
1403     }
1404
1405     // Disable save and print until the document is fully loaded, since they
1406     // would generate an incomplete document.  Need to do this each time we
1407     // call DidStartLoading since that resets the content restrictions.
1408     pp::PDF::SetContentRestriction(this, CONTENT_RESTRICTION_SAVE |
1409                                    CONTENT_RESTRICTION_PRINT);
1410   }
1411
1412   return CreateURLLoaderInternal();
1413 }
1414
1415 void Instance::ScheduleCallback(int id, int delay_in_ms) {
1416   pp::CompletionCallback callback =
1417       timer_factory_.NewCallback(&Instance::OnClientTimerFired);
1418   pp::Module::Get()->core()->CallOnMainThread(delay_in_ms, callback, id);
1419 }
1420
1421 void Instance::SearchString(const base::char16* string,
1422                             const base::char16* term,
1423                             bool case_sensitive,
1424                             std::vector<SearchStringResult>* results) {
1425   if (!pp::PDF::IsAvailable()) {
1426     NOTREACHED();
1427     return;
1428   }
1429
1430   PP_PrivateFindResult* pp_results;
1431   int count = 0;
1432   pp::PDF::SearchString(
1433       this,
1434       reinterpret_cast<const unsigned short*>(string),
1435       reinterpret_cast<const unsigned short*>(term),
1436       case_sensitive,
1437       &pp_results,
1438       &count);
1439
1440   results->resize(count);
1441   for (int i = 0; i < count; ++i) {
1442     (*results)[i].start_index = pp_results[i].start_index;
1443     (*results)[i].length = pp_results[i].length;
1444   }
1445
1446   pp::Memory_Dev memory;
1447   memory.MemFree(pp_results);
1448 }
1449
1450 void Instance::DocumentPaintOccurred() {
1451   if (painted_first_page_)
1452     return;
1453
1454   painted_first_page_ = true;
1455   UpdateToolbarPosition(false);
1456   toolbar_->Splash(kToolbarSplashTimeoutMs);
1457
1458   if (engine_->GetNumberOfPages() > 1)
1459     show_page_indicator_ = true;
1460   else
1461     show_page_indicator_ = false;
1462
1463   if (v_scrollbar_.get() && show_page_indicator_) {
1464     page_indicator_.set_current_page(GetPageNumberToDisplay());
1465     page_indicator_.Splash(kToolbarSplashTimeoutMs,
1466                            kPageIndicatorInitialFadeTimeoutMs);
1467   }
1468 }
1469
1470 void Instance::DocumentLoadComplete(int page_count) {
1471   // Clear focus state for OSK.
1472   FormTextFieldFocusChange(false);
1473
1474   // Update progress control.
1475   if (progress_bar_.visible())
1476     progress_bar_.Fade(false, kProgressFadeTimeoutMs);
1477
1478   DCHECK(document_load_state_ == LOAD_STATE_LOADING);
1479   document_load_state_ = LOAD_STATE_COMPLETE;
1480   UserMetricsRecordAction("PDF.LoadSuccess");
1481   if (on_load_callback_.is_string())
1482     ExecuteScript(on_load_callback_);
1483   // Note: If we are in print preview mode on_load_callback_ might call
1484   // ScrollTo{X|Y}() and we don't want to scroll again and override it.
1485   // #page=N is not supported in Print Preview.
1486   if (!IsPrintPreview()) {
1487     int initial_page = GetInitialPage(url_);
1488     if (initial_page >= 0)
1489       ScrollToPage(initial_page);
1490   }
1491
1492   if (!full_)
1493     return;
1494   if (!pp::PDF::IsAvailable())
1495     return;
1496
1497   if (did_call_start_loading_) {
1498     pp::PDF::DidStopLoading(this);
1499     did_call_start_loading_ = false;
1500   }
1501
1502   int content_restrictions =
1503       CONTENT_RESTRICTION_CUT | CONTENT_RESTRICTION_PASTE;
1504   if (!engine_->HasPermission(PDFEngine::PERMISSION_COPY))
1505     content_restrictions |= CONTENT_RESTRICTION_COPY;
1506
1507   if (!engine_->HasPermission(PDFEngine::PERMISSION_PRINT_LOW_QUALITY) &&
1508       !engine_->HasPermission(PDFEngine::PERMISSION_PRINT_HIGH_QUALITY)) {
1509     printing_enabled_ = false;
1510     if (current_tb_info_ == kPDFToolbarButtons) {
1511       // Remove Print button.
1512       CreateToolbar(kPDFNoPrintToolbarButtons,
1513                     arraysize(kPDFNoPrintToolbarButtons));
1514       UpdateToolbarPosition(false);
1515       Invalidate(pp::Rect(plugin_size_));
1516     }
1517   }
1518
1519   pp::PDF::SetContentRestriction(this, content_restrictions);
1520
1521   pp::PDF::HistogramPDFPageCount(this, page_count);
1522 }
1523
1524 void Instance::RotateClockwise() {
1525   engine_->RotateClockwise();
1526 }
1527
1528 void Instance::RotateCounterclockwise() {
1529   engine_->RotateCounterclockwise();
1530 }
1531
1532 void Instance::PreviewDocumentLoadComplete() {
1533   if (preview_document_load_state_ != LOAD_STATE_LOADING ||
1534       preview_pages_info_.empty()) {
1535     return;
1536   }
1537
1538   preview_document_load_state_ = LOAD_STATE_COMPLETE;
1539
1540   int dest_page_index = preview_pages_info_.front().second;
1541   int src_page_index =
1542       ExtractPrintPreviewPageIndex(preview_pages_info_.front().first);
1543   if (src_page_index > 0 &&  dest_page_index > -1 && preview_engine_.get())
1544     engine_->AppendPage(preview_engine_.get(), dest_page_index);
1545
1546   preview_pages_info_.pop();
1547   // |print_preview_page_count_| is not updated yet. Do not load any
1548   // other preview pages till we get this information.
1549   if (print_preview_page_count_ == 0)
1550     return;
1551
1552   if (preview_pages_info_.size())
1553     LoadAvailablePreviewPage();
1554 }
1555
1556 void Instance::DocumentLoadFailed() {
1557   DCHECK(document_load_state_ == LOAD_STATE_LOADING);
1558   UserMetricsRecordAction("PDF.LoadFailure");
1559
1560   // Hide progress control.
1561   progress_bar_.Fade(false, kProgressFadeTimeoutMs);
1562
1563   if (did_call_start_loading_) {
1564     pp::PDF::DidStopLoading(this);
1565     did_call_start_loading_ = false;
1566   }
1567
1568   document_load_state_ = LOAD_STATE_FAILED;
1569   paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
1570 }
1571
1572 void Instance::PreviewDocumentLoadFailed() {
1573   UserMetricsRecordAction("PDF.PreviewDocumentLoadFailure");
1574   if (preview_document_load_state_ != LOAD_STATE_LOADING ||
1575       preview_pages_info_.empty()) {
1576     return;
1577   }
1578
1579   preview_document_load_state_ = LOAD_STATE_FAILED;
1580   preview_pages_info_.pop();
1581
1582   if (preview_pages_info_.size())
1583     LoadAvailablePreviewPage();
1584 }
1585
1586 pp::Instance* Instance::GetPluginInstance() {
1587   return GetInstance();
1588 }
1589
1590 void Instance::DocumentHasUnsupportedFeature(const std::string& feature) {
1591   std::string metric("PDF_Unsupported_");
1592   metric += feature;
1593   if (!unsupported_features_reported_.count(metric)) {
1594     unsupported_features_reported_.insert(metric);
1595     UserMetricsRecordAction(metric);
1596   }
1597
1598   // Since we use an info bar, only do this for full frame plugins..
1599   if (!full_)
1600     return;
1601
1602   if (told_browser_about_unsupported_feature_)
1603     return;
1604   told_browser_about_unsupported_feature_ = true;
1605
1606   pp::PDF::HasUnsupportedFeature(this);
1607 }
1608
1609 void Instance::DocumentLoadProgress(uint32 available, uint32 doc_size) {
1610   double progress = 0.0;
1611   if (doc_size == 0) {
1612     // Document size is unknown. Use heuristics.
1613     // We'll make progress logarithmic from 0 to 100M.
1614     static const double kFactor = log(100000000.0) / 100.0;
1615     if (available > 0) {
1616       progress = log(static_cast<double>(available)) / kFactor;
1617       if (progress > 100.0)
1618         progress = 100.0;
1619     }
1620   } else {
1621     progress = 100.0 * static_cast<double>(available) / doc_size;
1622   }
1623   progress_bar_.SetProgress(progress);
1624 }
1625
1626 void Instance::FormTextFieldFocusChange(bool in_focus) {
1627   if (!text_input_.get())
1628     return;
1629   if (in_focus)
1630     text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_TEXT);
1631   else
1632     text_input_->SetTextInputType(PP_TEXTINPUT_TYPE_DEV_NONE);
1633 }
1634
1635 // Called by PDFScriptableObject.
1636 bool Instance::HasScriptableMethod(const pp::Var& method, pp::Var* exception) {
1637   std::string method_str = method.AsString();
1638   return (method_str == kJSAccessibility ||
1639           method_str == kJSDocumentLoadComplete ||
1640           method_str == kJSGetHeight ||
1641           method_str == kJSGetHorizontalScrollbarThickness ||
1642           method_str == kJSGetPageLocationNormalized ||
1643           method_str == kJSGetVerticalScrollbarThickness ||
1644           method_str == kJSGetWidth ||
1645           method_str == kJSGetZoomLevel ||
1646           method_str == kJSGoToPage ||
1647           method_str == kJSGrayscale ||
1648           method_str == kJSLoadPreviewPage ||
1649           method_str == kJSOnLoad ||
1650           method_str == kJSOnPluginSizeChanged ||
1651           method_str == kJSOnScroll ||
1652           method_str == kJSPageXOffset ||
1653           method_str == kJSPageYOffset ||
1654           method_str == kJSPrintPreviewPageCount ||
1655           method_str == kJSReload ||
1656           method_str == kJSRemovePrintButton ||
1657           method_str == kJSResetPrintPreviewUrl ||
1658           method_str == kJSSendKeyEvent ||
1659           method_str == kJSSetPageNumbers ||
1660           method_str == kJSSetPageXOffset ||
1661           method_str == kJSSetPageYOffset ||
1662           method_str == kJSSetZoomLevel ||
1663           method_str == kJSZoomFitToHeight ||
1664           method_str == kJSZoomFitToWidth ||
1665           method_str == kJSZoomIn ||
1666           method_str == kJSZoomOut);
1667 }
1668
1669 pp::Var Instance::CallScriptableMethod(const pp::Var& method,
1670                                        const std::vector<pp::Var>& args,
1671                                        pp::Var* exception) {
1672   std::string method_str = method.AsString();
1673   if (method_str == kJSGrayscale) {
1674     if (args.size() == 1 && args[0].is_bool()) {
1675       engine_->SetGrayscale(args[0].AsBool());
1676       // Redraw
1677       paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
1678 #ifdef ENABLE_THUMBNAILS
1679       if (thumbnails_.visible())
1680         thumbnails_.Show(true, true);
1681 #endif
1682       return pp::Var(true);
1683     }
1684     return pp::Var(false);
1685   }
1686   if (method_str == kJSOnLoad) {
1687     if (args.size() == 1 && args[0].is_string()) {
1688       on_load_callback_ = args[0];
1689       return pp::Var(true);
1690     }
1691     return pp::Var(false);
1692   }
1693   if (method_str == kJSOnScroll) {
1694     if (args.size() == 1 && args[0].is_string()) {
1695       on_scroll_callback_ = args[0];
1696       return pp::Var(true);
1697     }
1698     return pp::Var(false);
1699   }
1700   if (method_str == kJSOnPluginSizeChanged) {
1701     if (args.size() == 1 && args[0].is_string()) {
1702       on_plugin_size_changed_callback_ = args[0];
1703       return pp::Var(true);
1704     }
1705     return pp::Var(false);
1706   }
1707   if (method_str == kJSReload) {
1708     document_load_state_ = LOAD_STATE_LOADING;
1709     if (!full_)
1710       LoadUrl(url_);
1711     preview_engine_.reset();
1712     print_preview_page_count_ = 0;
1713     engine_.reset(PDFEngine::Create(this));
1714     engine_->New(url_.c_str());
1715 #ifdef ENABLE_THUMBNAILS
1716     thumbnails_.ResetEngine(engine_.get());
1717 #endif
1718     return pp::Var();
1719   }
1720   if (method_str == kJSResetPrintPreviewUrl) {
1721     if (args.size() == 1 && args[0].is_string()) {
1722       url_ = args[0].AsString();
1723       preview_pages_info_ = std::queue<PreviewPageInfo>();
1724       preview_document_load_state_ = LOAD_STATE_COMPLETE;
1725     }
1726     return pp::Var();
1727   }
1728   if (method_str == kJSZoomFitToHeight) {
1729     SetZoom(ZOOM_FIT_TO_PAGE, 0);
1730     return pp::Var();
1731   }
1732   if (method_str == kJSZoomFitToWidth) {
1733     SetZoom(ZOOM_FIT_TO_WIDTH, 0);
1734     return pp::Var();
1735   }
1736   if (method_str == kJSZoomIn) {
1737     SetZoom(ZOOM_SCALE, CalculateZoom(kZoomInButtonId));
1738     return pp::Var();
1739   }
1740   if (method_str == kJSZoomOut) {
1741     SetZoom(ZOOM_SCALE, CalculateZoom(kZoomOutButtonId));
1742     return pp::Var();
1743   }
1744   if (method_str == kJSSetZoomLevel) {
1745     if (args.size() == 1 && args[0].is_double())
1746       SetZoom(ZOOM_SCALE, args[0].AsDouble());
1747     return pp::Var();
1748   }
1749   if (method_str == kJSGetZoomLevel) {
1750     return pp::Var(zoom_);
1751   }
1752   if (method_str == kJSGetHeight) {
1753     return pp::Var(plugin_size_.height());
1754   }
1755   if (method_str == kJSGetWidth) {
1756     return pp::Var(plugin_size_.width());
1757   }
1758   if (method_str == kJSGetHorizontalScrollbarThickness) {
1759     return pp::Var(
1760           h_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1761   }
1762   if (method_str == kJSGetVerticalScrollbarThickness) {
1763     return pp::Var(
1764           v_scrollbar_.get() ? GetScrollbarReservedThickness() : 0);
1765   }
1766   if (method_str == kJSDocumentLoadComplete) {
1767     return pp::Var((document_load_state_ != LOAD_STATE_LOADING));
1768   }
1769   if (method_str == kJSPageYOffset) {
1770     return pp::Var(static_cast<int32_t>(
1771         v_scrollbar_.get() ? v_scrollbar_->GetValue() : 0));
1772   }
1773   if (method_str == kJSSetPageYOffset) {
1774     if (args.size() == 1 && args[0].is_number() && v_scrollbar_.get())
1775       ScrollToY(GetScaled(args[0].AsInt()));
1776     return pp::Var();
1777   }
1778   if (method_str == kJSPageXOffset) {
1779     return pp::Var(static_cast<int32_t>(
1780         h_scrollbar_.get() ? h_scrollbar_->GetValue() : 0));
1781   }
1782   if (method_str == kJSSetPageXOffset) {
1783     if (args.size() == 1 && args[0].is_number() && h_scrollbar_.get())
1784       ScrollToX(GetScaled(args[0].AsInt()));
1785     return pp::Var();
1786   }
1787   if (method_str == kJSRemovePrintButton) {
1788     CreateToolbar(kPrintPreviewToolbarButtons,
1789                   arraysize(kPrintPreviewToolbarButtons));
1790     UpdateToolbarPosition(false);
1791     Invalidate(pp::Rect(plugin_size_));
1792     return pp::Var();
1793   }
1794   if (method_str == kJSGoToPage) {
1795     if (args.size() == 1 && args[0].is_string()) {
1796       ScrollToPage(atoi(args[0].AsString().c_str()));
1797     }
1798     return pp::Var();
1799   }
1800   if (method_str == kJSAccessibility) {
1801     if (args.size() == 0) {
1802       base::DictionaryValue node;
1803       node.SetInteger(kAccessibleNumberOfPages, engine_->GetNumberOfPages());
1804       node.SetBoolean(kAccessibleLoaded,
1805                       document_load_state_ != LOAD_STATE_LOADING);
1806       bool has_permissions =
1807           engine_->HasPermission(PDFEngine::PERMISSION_COPY) ||
1808           engine_->HasPermission(PDFEngine::PERMISSION_COPY_ACCESSIBLE);
1809       node.SetBoolean(kAccessibleCopyable, has_permissions);
1810       std::string json;
1811       base::JSONWriter::Write(&node, &json);
1812       return pp::Var(json);
1813     } else if (args[0].is_number()) {
1814       return pp::Var(engine_->GetPageAsJSON(args[0].AsInt()));
1815     }
1816   }
1817   if (method_str == kJSPrintPreviewPageCount) {
1818     if (args.size() == 1 && args[0].is_number())
1819       SetPrintPreviewMode(args[0].AsInt());
1820     return pp::Var();
1821   }
1822   if (method_str == kJSLoadPreviewPage) {
1823     if (args.size() == 2 && args[0].is_string() && args[1].is_number())
1824       ProcessPreviewPageInfo(args[0].AsString(), args[1].AsInt());
1825     return pp::Var();
1826   }
1827   if (method_str == kJSGetPageLocationNormalized) {
1828     const size_t kMaxLength = 30;
1829     char location_info[kMaxLength];
1830     int page_idx = engine_->GetMostVisiblePage();
1831     if (page_idx < 0)
1832       return pp::Var(std::string());
1833     pp::Rect rect = engine_->GetPageContentsRect(page_idx);
1834     int v_scrollbar_reserved_thickness =
1835         v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
1836
1837     rect.set_x(rect.x() + ((plugin_size_.width() -
1838         v_scrollbar_reserved_thickness - available_area_.width()) / 2));
1839     base::snprintf(location_info,
1840                    kMaxLength,
1841                    "%0.4f;%0.4f;%0.4f;%0.4f;",
1842                    rect.x() / static_cast<float>(plugin_size_.width()),
1843                    rect.y() / static_cast<float>(plugin_size_.height()),
1844                    rect.width() / static_cast<float>(plugin_size_.width()),
1845                    rect.height()/ static_cast<float>(plugin_size_.height()));
1846     return pp::Var(std::string(location_info));
1847   }
1848   if (method_str == kJSSetPageNumbers) {
1849     if (args.size() != 1 || !args[0].is_string())
1850       return pp::Var();
1851     const int num_pages_signed = engine_->GetNumberOfPages();
1852     if (num_pages_signed <= 0)
1853       return pp::Var();
1854     scoped_ptr<base::ListValue> page_ranges(static_cast<base::ListValue*>(
1855         base::JSONReader::Read(args[0].AsString(), false)));
1856     const size_t num_pages = static_cast<size_t>(num_pages_signed);
1857     if (!page_ranges.get() || page_ranges->GetSize() != num_pages)
1858       return pp::Var();
1859
1860     std::vector<int> print_preview_page_numbers;
1861     for (size_t index = 0; index < num_pages; ++index) {
1862       int page_number = 0;  // |page_number| is 1-based.
1863       if (!page_ranges->GetInteger(index, &page_number) || page_number < 1)
1864         return pp::Var();
1865       print_preview_page_numbers.push_back(page_number);
1866     }
1867     print_preview_page_numbers_ = print_preview_page_numbers;
1868     page_indicator_.set_current_page(GetPageNumberToDisplay());
1869     return pp::Var();
1870   }
1871   // This is here to work around https://bugs.webkit.org/show_bug.cgi?id=16735.
1872   // In JS, creating a synthetic keyboard event and dispatching it always
1873   // result in a keycode of 0.
1874   if (method_str == kJSSendKeyEvent) {
1875     if (args.size() == 1 && args[0].is_number()) {
1876       pp::KeyboardInputEvent event(
1877           this,                        // instance
1878           PP_INPUTEVENT_TYPE_KEYDOWN,  // HandleInputEvent only care about this.
1879           0,                           // timestamp, not used for kbd events.
1880           0,                           // no modifiers.
1881           args[0].AsInt(),             // keycode.
1882           pp::Var());                  // no char text needed.
1883       HandleInputEvent(event);
1884     }
1885   }
1886   return pp::Var();
1887 }
1888
1889 void Instance::OnGeometryChanged(double old_zoom, float old_device_scale) {
1890   bool force_no_horizontal_scrollbar = false;
1891   int scrollbar_thickness = GetScrollbarThickness();
1892
1893   if (old_device_scale != device_scale_) {
1894     // Change in device scale forces us to recreate resources
1895     ConfigureNumberImageGenerator();
1896
1897     CreateToolbar(current_tb_info_, current_tb_info_size_);
1898     // Load autoscroll anchor image.
1899     autoscroll_anchor_ =
1900         CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
1901
1902     ConfigurePageIndicator();
1903     ConfigureProgressBar();
1904
1905     pp::Point scroll_position = engine_->GetScrollPosition();
1906     ScalePoint(device_scale_ / old_device_scale, &scroll_position);
1907     engine_->SetScrollPosition(scroll_position);
1908   }
1909
1910   UpdateZoomScale();
1911   if (zoom_ != old_zoom || device_scale_ != old_device_scale)
1912     engine_->ZoomUpdated(zoom_ * device_scale_);
1913   if (zoom_ != old_zoom)
1914     ZoomChanged(zoom_);
1915
1916   available_area_ = pp::Rect(plugin_size_);
1917   if (GetDocumentPixelHeight() > plugin_size_.height()) {
1918     CreateVerticalScrollbar();
1919   } else {
1920     DestroyVerticalScrollbar();
1921   }
1922
1923   int v_scrollbar_reserved_thickness =
1924       v_scrollbar_.get() ? GetScaled(GetScrollbarReservedThickness()) : 0;
1925
1926   if (!force_no_horizontal_scrollbar &&
1927       GetDocumentPixelWidth() >
1928       (plugin_size_.width() - v_scrollbar_reserved_thickness)) {
1929     CreateHorizontalScrollbar();
1930
1931     // Adding the horizontal scrollbar now might cause us to need vertical
1932     // scrollbars.
1933     if (GetDocumentPixelHeight() >
1934         plugin_size_.height() - GetScaled(GetScrollbarReservedThickness())) {
1935       CreateVerticalScrollbar();
1936     }
1937
1938   } else {
1939     DestroyHorizontalScrollbar();
1940   }
1941
1942 #ifdef ENABLE_THUMBNAILS
1943   int thumbnails_pos = 0, thumbnails_total = 0;
1944 #endif
1945   if (v_scrollbar_.get()) {
1946     v_scrollbar_->SetScale(device_scale_);
1947     available_area_.set_width(
1948       std::max(0, plugin_size_.width() - v_scrollbar_reserved_thickness));
1949
1950 #ifdef ENABLE_THUMBNAILS
1951     int height = plugin_size_.height();
1952 #endif
1953     int height_dip = plugin_dip_size_.height();
1954
1955 #if defined(OS_MACOSX)
1956     // Before Lion, Mac always had the resize at the bottom. After that, it
1957     // never did.
1958     if ((base::mac::IsOSSnowLeopard() && full_) ||
1959         (base::mac::IsOSLionOrLater() && h_scrollbar_.get())) {
1960 #else
1961     if (h_scrollbar_.get()) {
1962 #endif  // defined(OS_MACOSX)
1963 #ifdef ENABLE_THUMBNAILS
1964       height -= GetScaled(GetScrollbarThickness());
1965 #endif
1966       height_dip -= GetScrollbarThickness();
1967     }
1968 #ifdef ENABLE_THUMBNAILS
1969     int32 doc_height = GetDocumentPixelHeight();
1970 #endif
1971     int32 doc_height_dip =
1972         static_cast<int32>(GetDocumentPixelHeight() / device_scale_);
1973 #if defined(OS_MACOSX)
1974     // On the Mac we always allow room for the resize button (whose width is
1975     // the same as that of the scrollbar) in full mode. However, if there is no
1976     // no horizontal scrollbar, the end of the scrollbar will scroll past the
1977     // end of the document. This is because the scrollbar assumes that its own
1978     // height (in the case of a vscroll bar) is the same as the height of the
1979     // viewport. Since the viewport is actually larger, we compensate by
1980     // adjusting the document height. Similar logic applies below for the
1981     // horizontal scrollbar.
1982     // For example, if the document size is 1000, and the viewport size is 200,
1983     // then the scrollbar position at the end will be 800. In this case the
1984     // viewport is actally 215 (assuming 15 as the scrollbar width) but the
1985     // scrollbar thinks it is 200. We want the scrollbar position at the end to
1986     // be 785. Making the document size 985 achieves this.
1987     if (full_ && !h_scrollbar_.get()) {
1988 #ifdef ENABLE_THUMBNAILS
1989       doc_height -= GetScaled(GetScrollbarThickness());
1990 #endif
1991       doc_height_dip -= GetScrollbarThickness();
1992     }
1993 #endif  // defined(OS_MACOSX)
1994
1995     int32 position;
1996     position = v_scrollbar_->GetValue();
1997     position = static_cast<int>(position * zoom_ / old_zoom);
1998     valid_v_range_ = doc_height_dip - height_dip;
1999     if (position > valid_v_range_)
2000       position = valid_v_range_;
2001
2002     v_scrollbar_->SetValue(position);
2003
2004     PP_Rect loc;
2005     loc.point.x = static_cast<int>(available_area_.right() / device_scale_);
2006     if (IsOverlayScrollbar())
2007       loc.point.x -= scrollbar_thickness;
2008     loc.point.y = 0;
2009     loc.size.width = scrollbar_thickness;
2010     loc.size.height = height_dip;
2011     v_scrollbar_->SetLocation(loc);
2012     v_scrollbar_->SetDocumentSize(doc_height_dip);
2013
2014 #ifdef ENABLE_THUMBNAILS
2015     thumbnails_pos = position;
2016     thumbnails_total = doc_height - height;
2017 #endif
2018   }
2019
2020   if (h_scrollbar_.get()) {
2021     h_scrollbar_->SetScale(device_scale_);
2022     available_area_.set_height(
2023         std::max(0, plugin_size_.height() -
2024                     GetScaled(GetScrollbarReservedThickness())));
2025
2026     int width_dip = plugin_dip_size_.width();
2027
2028     // See note above.
2029 #if defined(OS_MACOSX)
2030     if ((base::mac::IsOSSnowLeopard() && full_) ||
2031         (base::mac::IsOSLionOrLater() && v_scrollbar_.get())) {
2032 #else
2033     if (v_scrollbar_.get()) {
2034 #endif
2035       width_dip -= GetScrollbarThickness();
2036     }
2037     int32 doc_width_dip =
2038         static_cast<int32>(GetDocumentPixelWidth() / device_scale_);
2039 #if defined(OS_MACOSX)
2040     // See comment in the above if (v_scrollbar_.get()) block.
2041     if (full_ && !v_scrollbar_.get())
2042       doc_width_dip -= GetScrollbarThickness();
2043 #endif  // defined(OS_MACOSX)
2044
2045     int32 position;
2046     position = h_scrollbar_->GetValue();
2047     position = static_cast<int>(position * zoom_ / old_zoom);
2048     position = std::min(position, doc_width_dip - width_dip);
2049
2050     h_scrollbar_->SetValue(position);
2051
2052     PP_Rect loc;
2053     loc.point.x = 0;
2054     loc.point.y = static_cast<int>(available_area_.bottom() / device_scale_);
2055     if (IsOverlayScrollbar())
2056       loc.point.y -= scrollbar_thickness;
2057     loc.size.width = width_dip;
2058     loc.size.height = scrollbar_thickness;
2059     h_scrollbar_->SetLocation(loc);
2060     h_scrollbar_->SetDocumentSize(doc_width_dip);
2061   }
2062
2063   int doc_width = GetDocumentPixelWidth();
2064   if (doc_width < available_area_.width()) {
2065     available_area_.Offset((available_area_.width() - doc_width) / 2, 0);
2066     available_area_.set_width(doc_width);
2067   }
2068   int doc_height = GetDocumentPixelHeight();
2069   if (doc_height < available_area_.height()) {
2070     available_area_.set_height(doc_height);
2071   }
2072
2073   // We'll invalidate the entire plugin anyways.
2074   UpdateToolbarPosition(false);
2075   UpdateProgressBarPosition(false);
2076   UpdatePageIndicatorPosition(false);
2077
2078 #ifdef ENABLE_THUMBNAILS
2079   // Update thumbnail control position.
2080   thumbnails_.SetPosition(thumbnails_pos, thumbnails_total, false);
2081   pp::Rect thumbnails_rc(plugin_size_.width() - GetScaled(kThumbnailsWidth), 0,
2082     GetScaled(kThumbnailsWidth), plugin_size_.height());
2083   if (v_scrollbar_.get())
2084     thumbnails_rc.Offset(-v_scrollbar_reserved_thickness, 0);
2085   if (h_scrollbar_.get())
2086     thumbnails_rc.Inset(0, 0, 0, v_scrollbar_reserved_thickness);
2087   thumbnails_.SetRect(thumbnails_rc, false);
2088 #endif
2089
2090   CalculateBackgroundParts();
2091   engine_->PageOffsetUpdated(available_area_.point());
2092   engine_->PluginSizeUpdated(available_area_.size());
2093
2094   if (!document_size_.GetArea())
2095     return;
2096   paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
2097
2098   if (on_plugin_size_changed_callback_.is_string())
2099     ExecuteScript(on_plugin_size_changed_callback_);
2100 }
2101
2102 void Instance::CreateHorizontalScrollbar() {
2103   if (h_scrollbar_.get())
2104     return;
2105
2106   h_scrollbar_.reset(new pp::Scrollbar_Dev(this, false));
2107 }
2108
2109 void Instance::CreateVerticalScrollbar() {
2110   if (v_scrollbar_.get())
2111     return;
2112
2113   v_scrollbar_.reset(new pp::Scrollbar_Dev(this, true));
2114 }
2115
2116 void Instance::DestroyHorizontalScrollbar() {
2117   if (!h_scrollbar_.get())
2118     return;
2119   if (h_scrollbar_->GetValue())
2120     engine_->ScrolledToXPosition(0);
2121   h_scrollbar_.reset();
2122 }
2123
2124 void Instance::DestroyVerticalScrollbar() {
2125   if (!v_scrollbar_.get())
2126     return;
2127   if (v_scrollbar_->GetValue())
2128     engine_->ScrolledToYPosition(0);
2129   v_scrollbar_.reset();
2130   page_indicator_.Show(false, true);
2131 }
2132
2133 int Instance::GetScrollbarThickness() {
2134   if (scrollbar_thickness_ == -1) {
2135     pp::Scrollbar_Dev temp_scrollbar(this, false);
2136     scrollbar_thickness_ = temp_scrollbar.GetThickness();
2137     scrollbar_reserved_thickness_ =
2138       temp_scrollbar.IsOverlay() ? 0 : scrollbar_thickness_;
2139   }
2140
2141   return scrollbar_thickness_;
2142 }
2143
2144 int Instance::GetScrollbarReservedThickness() {
2145   GetScrollbarThickness();
2146   return scrollbar_reserved_thickness_;
2147 }
2148
2149 bool Instance::IsOverlayScrollbar() {
2150   return GetScrollbarReservedThickness() == 0;
2151 }
2152
2153 void Instance::CreateToolbar(const ToolbarButtonInfo* tb_info, size_t size) {
2154   toolbar_.reset(new FadingControls());
2155
2156   DCHECK(tb_info);
2157   DCHECK(size >= 0);
2158
2159   // Remember the current toolbar information in case we need to recreate the
2160   // images later.
2161   current_tb_info_ = tb_info;
2162   current_tb_info_size_ = size;
2163
2164   int max_height = 0;
2165   pp::Point origin(kToolbarFadingOffsetLeft, kToolbarFadingOffsetTop);
2166   ScalePoint(device_scale_, &origin);
2167
2168   std::list<Button*> buttons;
2169   for (size_t i = 0; i < size; i++) {
2170     Button* btn = new Button;
2171     pp::ImageData normal_face =
2172         CreateResourceImage(tb_info[i].normal);
2173     btn->CreateButton(tb_info[i].id,
2174                       origin,
2175                       true,
2176                       toolbar_.get(),
2177                       tb_info[i].style,
2178                       normal_face,
2179                       CreateResourceImage(tb_info[i].highlighted),
2180                       CreateResourceImage(tb_info[i].pressed));
2181     buttons.push_back(btn);
2182
2183     origin += pp::Point(normal_face.size().width(), 0);
2184     max_height = std::max(max_height, normal_face.size().height());
2185   }
2186
2187   pp::Rect rc_toolbar(0, 0,
2188       origin.x() + GetToolbarRightOffset(),
2189       origin.y() + max_height + GetToolbarBottomOffset());
2190   toolbar_->CreateFadingControls(
2191       kToolbarId, rc_toolbar, false, this, kTransparentAlpha);
2192
2193   std::list<Button*>::iterator iter;
2194   for (iter = buttons.begin(); iter != buttons.end(); ++iter) {
2195     toolbar_->AddControl(*iter);
2196   }
2197 }
2198
2199 int Instance::GetToolbarRightOffset() {
2200   int scrollbar_thickness = GetScrollbarThickness();
2201   return GetScaled(kToolbarFadingOffsetRight) + 2 * scrollbar_thickness;
2202 }
2203
2204 int Instance::GetToolbarBottomOffset() {
2205   int scrollbar_thickness = GetScrollbarThickness();
2206   return GetScaled(kToolbarFadingOffsetBottom) + scrollbar_thickness;
2207 }
2208
2209 std::vector<pp::ImageData> Instance::GetThumbnailResources() {
2210   std::vector<pp::ImageData> num_images(10);
2211   num_images[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_0);
2212   num_images[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_1);
2213   num_images[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_2);
2214   num_images[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_3);
2215   num_images[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_4);
2216   num_images[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_5);
2217   num_images[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_6);
2218   num_images[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_7);
2219   num_images[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_8);
2220   num_images[9] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_9);
2221   return num_images;
2222 }
2223
2224 std::vector<pp::ImageData> Instance::GetProgressBarResources(
2225     pp::ImageData* background) {
2226   std::vector<pp::ImageData> result(9);
2227   result[0] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_0);
2228   result[1] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_1);
2229   result[2] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_2);
2230   result[3] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_3);
2231   result[4] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_4);
2232   result[5] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_5);
2233   result[6] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_6);
2234   result[7] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_7);
2235   result[8] = CreateResourceImage(PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_8);
2236   *background = CreateResourceImage(
2237       PP_RESOURCEIMAGE_PDF_PROGRESS_BAR_BACKGROUND);
2238   return result;
2239 }
2240
2241 void Instance::CreatePageIndicator(bool always_visible) {
2242   page_indicator_.CreatePageIndicator(kPageIndicatorId, false, this,
2243       number_image_generator(), always_visible);
2244   ConfigurePageIndicator();
2245 }
2246
2247 void Instance::ConfigurePageIndicator() {
2248   pp::ImageData background =
2249       CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAGE_INDICATOR_BACKGROUND);
2250   page_indicator_.Configure(pp::Point(), background);
2251 }
2252
2253 void Instance::CreateProgressBar() {
2254   pp::ImageData background;
2255   std::vector<pp::ImageData> images = GetProgressBarResources(&background);
2256   std::string text = GetLocalizedString(PP_RESOURCESTRING_PDFPROGRESSLOADING);
2257   progress_bar_.CreateProgressControl(kProgressBarId, false, this, 0.0,
2258       device_scale_, images, background, text);
2259 }
2260
2261 void Instance::ConfigureProgressBar() {
2262   pp::ImageData background;
2263   std::vector<pp::ImageData> images = GetProgressBarResources(&background);
2264   progress_bar_.Reconfigure(background, images, device_scale_);
2265 }
2266
2267 void Instance::CreateThumbnails() {
2268   thumbnails_.CreateThumbnailControl(
2269       kThumbnailsId, pp::Rect(), false, this, engine_.get(),
2270       number_image_generator());
2271 }
2272
2273 void Instance::LoadUrl(const std::string& url) {
2274   LoadUrlInternal(url, &embed_loader_, &Instance::DidOpen);
2275 }
2276
2277 void Instance::LoadPreviewUrl(const std::string& url) {
2278   LoadUrlInternal(url, &embed_preview_loader_, &Instance::DidOpenPreview);
2279 }
2280
2281 void Instance::LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
2282                                void (Instance::* method)(int32_t)) {
2283   pp::URLRequestInfo request(this);
2284   request.SetURL(url);
2285   request.SetMethod("GET");
2286
2287   *loader = CreateURLLoaderInternal();
2288   pp::CompletionCallback callback = loader_factory_.NewCallback(method);
2289   int rv = loader->Open(request, callback);
2290   if (rv != PP_OK_COMPLETIONPENDING)
2291     callback.Run(rv);
2292 }
2293
2294 pp::URLLoader Instance::CreateURLLoaderInternal() {
2295   pp::URLLoader loader(this);
2296
2297   const PPB_URLLoaderTrusted* trusted_interface =
2298       reinterpret_cast<const PPB_URLLoaderTrusted*>(
2299           pp::Module::Get()->GetBrowserInterface(
2300               PPB_URLLOADERTRUSTED_INTERFACE));
2301   if (trusted_interface)
2302     trusted_interface->GrantUniversalAccess(loader.pp_resource());
2303   return loader;
2304 }
2305
2306 int Instance::GetInitialPage(const std::string& url) {
2307 #if defined(OS_NACL)
2308   return -1;
2309 #else
2310   size_t found_idx = url.find('#');
2311   if (found_idx == std::string::npos)
2312     return -1;
2313
2314   const std::string& ref = url.substr(found_idx + 1);
2315   std::vector<std::string> fragments;
2316   Tokenize(ref, kDelimiters, &fragments);
2317
2318   // Page number to return, zero-based.
2319   int page = -1;
2320
2321   // Handle the case of http://foo.com/bar#NAMEDDEST. This is not explicitly
2322   // mentioned except by example in the Adobe "PDF Open Parameters" document.
2323   if ((fragments.size() == 1) && (fragments[0].find('=') == std::string::npos))
2324     return engine_->GetNamedDestinationPage(fragments[0]);
2325
2326   for (size_t i = 0; i < fragments.size(); ++i) {
2327     std::vector<std::string> key_value;
2328     base::SplitString(fragments[i], '=', &key_value);
2329     if (key_value.size() != 2)
2330       continue;
2331     const std::string& key = key_value[0];
2332     const std::string& value = key_value[1];
2333
2334     if (base::strcasecmp(kPage, key.c_str()) == 0) {
2335       // |page_value| is 1-based.
2336       int page_value = -1;
2337       if (base::StringToInt(value, &page_value) && page_value > 0)
2338         page = page_value - 1;
2339       continue;
2340     }
2341     if (base::strcasecmp(kNamedDest, key.c_str()) == 0) {
2342       // |page_value| is 0-based.
2343       int page_value = engine_->GetNamedDestinationPage(value);
2344       if (page_value >= 0)
2345         page = page_value;
2346       continue;
2347     }
2348   }
2349   return page;
2350 #endif
2351 }
2352
2353 void Instance::UpdateToolbarPosition(bool invalidate) {
2354   pp::Rect ctrl_rc = toolbar_->GetControlsRect();
2355   int min_toolbar_width = ctrl_rc.width() + GetToolbarRightOffset() +
2356       GetScaled(kToolbarFadingOffsetLeft);
2357   int min_toolbar_height = ctrl_rc.width() + GetToolbarBottomOffset() +
2358       GetScaled(kToolbarFadingOffsetBottom);
2359
2360   // Update toolbar position
2361   if (plugin_size_.width() < min_toolbar_width ||
2362       plugin_size_.height() < min_toolbar_height) {
2363     // Disable toolbar if it does not fit on the screen.
2364     toolbar_->Show(false, invalidate);
2365   } else {
2366     pp::Point offset(
2367         plugin_size_.width() - GetToolbarRightOffset() - ctrl_rc.right(),
2368         plugin_size_.height() - GetToolbarBottomOffset() - ctrl_rc.bottom());
2369     toolbar_->MoveBy(offset, invalidate);
2370
2371     int toolbar_width = std::max(plugin_size_.width() / 2, min_toolbar_width);
2372     toolbar_->ExpandLeft(toolbar_width - toolbar_->rect().width());
2373     toolbar_->Show(painted_first_page_, invalidate);
2374   }
2375 }
2376
2377 void Instance::UpdateProgressBarPosition(bool invalidate) {
2378   // TODO(gene): verify we don't overlap with toolbar.
2379   int scrollbar_thickness = GetScrollbarThickness();
2380   pp::Point progress_origin(
2381       scrollbar_thickness + GetScaled(kProgressOffsetLeft),
2382       plugin_size_.height() - progress_bar_.rect().height() -
2383           scrollbar_thickness - GetScaled(kProgressOffsetBottom));
2384   progress_bar_.MoveTo(progress_origin, invalidate);
2385 }
2386
2387 void Instance::UpdatePageIndicatorPosition(bool invalidate) {
2388   int32 doc_height = static_cast<int>(document_size_.height() * zoom_);
2389   pp::Point origin(
2390       plugin_size_.width() - page_indicator_.rect().width() -
2391           GetScaled(GetScrollbarReservedThickness()),
2392       page_indicator_.GetYPosition(engine_->GetVerticalScrollbarYPosition(),
2393                                    doc_height, plugin_size_.height()));
2394   page_indicator_.MoveTo(origin, invalidate);
2395 }
2396
2397 void Instance::SetZoom(ZoomMode zoom_mode, double scale) {
2398   double old_zoom = zoom_;
2399
2400   zoom_mode_ = zoom_mode;
2401   if (zoom_mode_ == ZOOM_SCALE)
2402     zoom_ = scale;
2403   UpdateZoomScale();
2404
2405   engine_->ZoomUpdated(zoom_ * device_scale_);
2406   OnGeometryChanged(old_zoom, device_scale_);
2407
2408   // If fit-to-height, snap to the beginning of the most visible page.
2409   if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
2410     ScrollToPage(engine_->GetMostVisiblePage());
2411   }
2412
2413   // Update sticky buttons to the current zoom style.
2414   Button* ftp_btn = static_cast<Button*>(
2415       toolbar_->GetControl(kFitToPageButtonId));
2416   Button* ftw_btn = static_cast<Button*>(
2417       toolbar_->GetControl(kFitToWidthButtonId));
2418   switch (zoom_mode_) {
2419     case ZOOM_FIT_TO_PAGE:
2420       ftp_btn->SetPressedState(true);
2421       ftw_btn->SetPressedState(false);
2422       break;
2423     case ZOOM_FIT_TO_WIDTH:
2424       ftw_btn->SetPressedState(true);
2425       ftp_btn->SetPressedState(false);
2426       break;
2427     default:
2428       ftw_btn->SetPressedState(false);
2429       ftp_btn->SetPressedState(false);
2430   }
2431 }
2432
2433 void Instance::UpdateZoomScale() {
2434   switch (zoom_mode_) {
2435     case ZOOM_SCALE:
2436       break;  // Keep current scale.
2437     case ZOOM_FIT_TO_PAGE: {
2438       int page_num = engine_->GetFirstVisiblePage();
2439       if (page_num == -1)
2440         break;
2441       pp::Rect rc = engine_->GetPageRect(page_num);
2442       if (!rc.height())
2443         break;
2444       // Calculate fit to width zoom level.
2445       double ftw_zoom = static_cast<double>(plugin_dip_size_.width() -
2446           GetScrollbarReservedThickness()) / document_size_.width();
2447       // Calculate fit to height zoom level. If document will not fit
2448       // horizontally, adjust zoom level to allow space for horizontal
2449       // scrollbar.
2450       double fth_zoom =
2451           static_cast<double>(plugin_dip_size_.height()) / rc.height();
2452       if (fth_zoom * document_size_.width() >
2453           plugin_dip_size_.width() - GetScrollbarReservedThickness())
2454         fth_zoom = static_cast<double>(plugin_dip_size_.height()
2455             - GetScrollbarReservedThickness()) / rc.height();
2456       zoom_ = std::min(ftw_zoom, fth_zoom);
2457     } break;
2458     case ZOOM_FIT_TO_WIDTH:
2459     case ZOOM_AUTO:
2460       if (!document_size_.width())
2461         break;
2462       zoom_ = static_cast<double>(plugin_dip_size_.width() -
2463           GetScrollbarReservedThickness()) / document_size_.width();
2464       if (zoom_mode_ == ZOOM_AUTO && zoom_ > 1.0)
2465         zoom_ = 1.0;
2466       break;
2467   }
2468   zoom_ = ClipToRange(zoom_, kMinZoom, kMaxZoom);
2469 }
2470
2471 double Instance::CalculateZoom(uint32 control_id) const {
2472   if (control_id == kZoomInButtonId) {
2473     for (size_t i = 0; i < chrome_page_zoom::kPresetZoomFactorsSize; ++i) {
2474       double current_zoom = chrome_page_zoom::kPresetZoomFactors[i];
2475       if (current_zoom - content::kEpsilon > zoom_)
2476         return current_zoom;
2477     }
2478   } else {
2479     for (size_t i = chrome_page_zoom::kPresetZoomFactorsSize; i > 0; --i) {
2480       double current_zoom = chrome_page_zoom::kPresetZoomFactors[i - 1];
2481       if (current_zoom + content::kEpsilon < zoom_)
2482         return current_zoom;
2483     }
2484   }
2485   return zoom_;
2486 }
2487
2488 pp::ImageData Instance::CreateResourceImage(PP_ResourceImage image_id) {
2489   if (hidpi_enabled_)
2490     return pp::PDF::GetResourceImageForScale(this, image_id, device_scale_);
2491
2492   return pp::PDF::GetResourceImage(this, image_id);
2493 }
2494
2495 std::string Instance::GetLocalizedString(PP_ResourceString id) {
2496   pp::Var rv(pp::PDF::GetLocalizedString(this, id));
2497   if (!rv.is_string())
2498     return std::string();
2499
2500   return rv.AsString();
2501 }
2502
2503 void Instance::DrawText(const pp::Point& top_center, PP_ResourceString id) {
2504   std::string str(GetLocalizedString(id));
2505
2506   pp::FontDescription_Dev description;
2507   description.set_family(PP_FONTFAMILY_SANSSERIF);
2508   description.set_size(kMessageTextSize * device_scale_);
2509   pp::Font_Dev font(this, description);
2510   int length = font.MeasureSimpleText(str);
2511   pp::Point point(top_center);
2512   point.set_x(point.x() - length / 2);
2513   DCHECK(!image_data_.is_null());
2514   font.DrawSimpleText(&image_data_, str, point, kMessageTextColor);
2515 }
2516
2517 void Instance::SetPrintPreviewMode(int page_count) {
2518   if (!IsPrintPreview() || page_count <= 0) {
2519     print_preview_page_count_ = 0;
2520     return;
2521   }
2522
2523   print_preview_page_count_ = page_count;
2524   ScrollToPage(0);
2525   engine_->AppendBlankPages(print_preview_page_count_);
2526   if (preview_pages_info_.size() > 0)
2527     LoadAvailablePreviewPage();
2528 }
2529
2530 bool Instance::IsPrintPreview() {
2531   return IsPrintPreviewUrl(url_);
2532 }
2533
2534 int Instance::GetPageNumberToDisplay() {
2535   int page = engine_->GetMostVisiblePage();
2536   if (IsPrintPreview() && !print_preview_page_numbers_.empty()) {
2537     page = ClipToRange<int>(page, 0, print_preview_page_numbers_.size() - 1);
2538     return print_preview_page_numbers_[page];
2539   }
2540   return page + 1;
2541 }
2542
2543 void Instance::ProcessPreviewPageInfo(const std::string& url,
2544                                       int dst_page_index) {
2545   if (!IsPrintPreview() || print_preview_page_count_ < 0)
2546     return;
2547
2548   int src_page_index = ExtractPrintPreviewPageIndex(url);
2549   if (src_page_index < 1)
2550     return;
2551
2552   preview_pages_info_.push(std::make_pair(url, dst_page_index));
2553   LoadAvailablePreviewPage();
2554 }
2555
2556 void Instance::LoadAvailablePreviewPage() {
2557   if (preview_pages_info_.size() <= 0)
2558     return;
2559
2560   std::string url = preview_pages_info_.front().first;
2561   int dst_page_index = preview_pages_info_.front().second;
2562   int src_page_index = ExtractPrintPreviewPageIndex(url);
2563   if (src_page_index < 1 ||
2564       dst_page_index >= print_preview_page_count_ ||
2565       preview_document_load_state_ == LOAD_STATE_LOADING) {
2566     return;
2567   }
2568
2569   preview_document_load_state_ = LOAD_STATE_LOADING;
2570   LoadPreviewUrl(url);
2571 }
2572
2573 void Instance::EnableAutoscroll(const pp::Point& origin) {
2574   if (is_autoscroll_)
2575     return;
2576
2577   pp::Size client_size = plugin_size_;
2578   if (v_scrollbar_.get())
2579     client_size.Enlarge(-GetScrollbarThickness(), 0);
2580   if (h_scrollbar_.get())
2581     client_size.Enlarge(0, -GetScrollbarThickness());
2582
2583   // Do not allow autoscroll if client area is too small.
2584   if (autoscroll_anchor_.size().width() > client_size.width() ||
2585       autoscroll_anchor_.size().height() > client_size.height())
2586     return;
2587
2588   autoscroll_rect_ = pp::Rect(
2589       pp::Point(origin.x() - autoscroll_anchor_.size().width() / 2,
2590                 origin.y() - autoscroll_anchor_.size().height() / 2),
2591       autoscroll_anchor_.size());
2592
2593   // Make sure autoscroll anchor is in the client area.
2594   if (autoscroll_rect_.right() > client_size.width()) {
2595     autoscroll_rect_.set_x(
2596         client_size.width() - autoscroll_anchor_.size().width());
2597   }
2598   if (autoscroll_rect_.bottom() > client_size.height()) {
2599     autoscroll_rect_.set_y(
2600         client_size.height() - autoscroll_anchor_.size().height());
2601   }
2602
2603   if (autoscroll_rect_.x() < 0)
2604     autoscroll_rect_.set_x(0);
2605   if (autoscroll_rect_.y() < 0)
2606     autoscroll_rect_.set_y(0);
2607
2608   is_autoscroll_ = true;
2609   Invalidate(kAutoScrollId, autoscroll_rect_);
2610
2611   ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);
2612 }
2613
2614 void Instance::DisableAutoscroll() {
2615   if (is_autoscroll_) {
2616     is_autoscroll_ = false;
2617     Invalidate(kAutoScrollId, autoscroll_rect_);
2618   }
2619 }
2620
2621 PP_CursorType_Dev Instance::CalculateAutoscroll(const pp::Point& mouse_pos) {
2622   // Scroll only if mouse pointer is outside of the anchor area.
2623   if (autoscroll_rect_.Contains(mouse_pos)) {
2624     autoscroll_x_ = 0;
2625     autoscroll_y_ = 0;
2626     return PP_CURSORTYPE_MIDDLEPANNING;
2627   }
2628
2629   // Relative position to the center of anchor area.
2630   pp::Point rel_pos = mouse_pos - autoscroll_rect_.CenterPoint();
2631
2632   // Calculate angle from the X axis. Angle is in range from -pi to pi.
2633   double angle = atan2(static_cast<double>(rel_pos.y()),
2634                        static_cast<double>(rel_pos.x()));
2635
2636   autoscroll_x_ = rel_pos.x() * kAutoScrollFactor;
2637   autoscroll_y_ = rel_pos.y() * kAutoScrollFactor;
2638
2639   // Angle is from -pi to pi. Screen Y is increasing toward bottom,
2640   // so negative angle represent north direction.
2641   if (angle < - (M_PI * 7.0 / 8.0)) {
2642     // going west
2643     return PP_CURSORTYPE_WESTPANNING;
2644   } else if (angle < - (M_PI * 5.0 / 8.0)) {
2645     // going north-west
2646     return PP_CURSORTYPE_NORTHWESTPANNING;
2647   } else if (angle < - (M_PI * 3.0 / 8.0)) {
2648     // going north.
2649     return PP_CURSORTYPE_NORTHPANNING;
2650   } else if (angle < - (M_PI * 1.0 / 8.0)) {
2651     // going north-east
2652     return PP_CURSORTYPE_NORTHEASTPANNING;
2653   } else if (angle < M_PI * 1.0 / 8.0) {
2654     // going east.
2655     return PP_CURSORTYPE_EASTPANNING;
2656   } else if (angle < M_PI * 3.0 / 8.0) {
2657     // going south-east
2658     return PP_CURSORTYPE_SOUTHEASTPANNING;
2659   } else if (angle < M_PI * 5.0 / 8.0) {
2660     // going south.
2661     return PP_CURSORTYPE_SOUTHPANNING;
2662   } else if (angle < M_PI * 7.0 / 8.0) {
2663     // going south-west
2664     return PP_CURSORTYPE_SOUTHWESTPANNING;
2665   }
2666
2667   // went around the circle, going west again
2668   return PP_CURSORTYPE_WESTPANNING;
2669 }
2670
2671 void Instance::ConfigureNumberImageGenerator() {
2672   std::vector<pp::ImageData> num_images = GetThumbnailResources();
2673   pp::ImageData number_background = CreateResourceImage(
2674       PP_RESOURCEIMAGE_PDF_BUTTON_THUMBNAIL_NUM_BACKGROUND);
2675   number_image_generator_->Configure(number_background,
2676                                      num_images,
2677                                      device_scale_);
2678 }
2679
2680 NumberImageGenerator* Instance::number_image_generator() {
2681   if (!number_image_generator_.get()) {
2682     number_image_generator_.reset(new NumberImageGenerator(this));
2683     ConfigureNumberImageGenerator();
2684   }
2685   return number_image_generator_.get();
2686 }
2687
2688 int Instance::GetScaled(int x) const {
2689   return static_cast<int>(x * device_scale_);
2690 }
2691
2692 void Instance::UserMetricsRecordAction(const std::string& action) {
2693   pp::PDF::UserMetricsRecordAction(this, pp::Var(action));
2694 }
2695
2696 PDFScriptableObject::PDFScriptableObject(Instance* instance)
2697     : instance_(instance) {
2698 }
2699
2700 PDFScriptableObject::~PDFScriptableObject() {
2701 }
2702
2703 bool PDFScriptableObject::HasMethod(const pp::Var& name, pp::Var* exception) {
2704   return instance_->HasScriptableMethod(name, exception);
2705 }
2706
2707 pp::Var PDFScriptableObject::Call(const pp::Var& method,
2708                                   const std::vector<pp::Var>& args,
2709                                   pp::Var* exception) {
2710   return instance_->CallScriptableMethod(method, args, exception);
2711 }
2712
2713 }  // namespace chrome_pdf