widget/cocoa/nsLookAndFeel.mm

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsLookAndFeel.h"
   7 #include "nsCocoaFeatures.h"
   8 #include "nsIServiceManager.h"
   9 #include "nsNativeThemeColors.h"
  10 #include "nsStyleConsts.h"
  11 #include "nsCocoaFeatures.h"
  12 #include "gfxFont.h"
  13 #include "gfxFontConstants.h"
  14 #include "mozilla/gfx/2D.h"
  15
  16 #import <Cocoa/Cocoa.h>
  17
  18 // This must be included last:
  19 #include "nsObjCExceptions.h"
  20
  21 enum {
  22   mozNSScrollerStyleLegacy       = 0,
  23   mozNSScrollerStyleOverlay      = 1
  24 };
  25 typedef NSInteger mozNSScrollerStyle;
  26
  27 @interface NSScroller(AvailableSinceLion)
  28 + (mozNSScrollerStyle)preferredScrollerStyle;
  29 @end
  30
  31 nsLookAndFeel::nsLookAndFeel() : nsXPLookAndFeel()
  32 {
  33 }
  34
  35 nsLookAndFeel::~nsLookAndFeel()
  36 {
  37 }
  38
  39 static nscolor GetColorFromNSColor(NSColor* aColor)
  40 {
  41   NSColor* deviceColor = [aColor colorUsingColorSpaceName:NSDeviceRGBColorSpace];
  42   return NS_RGB((unsigned int)([deviceColor redComponent] * 255.0),
  43                 (unsigned int)([deviceColor greenComponent] * 255.0),
  44                 (unsigned int)([deviceColor blueComponent] * 255.0));
  45 }
  46
  47 nsresult
  48 nsLookAndFeel::NativeGetColor(ColorID aID, nscolor &aColor)
  49 {
  50   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
  51
  52   nsresult res = NS_OK;
  53
  54   switch (aID) {
  55     case eColorID_WindowBackground:
  56       aColor = NS_RGB(0xff,0xff,0xff);
  57       break;
  58     case eColorID_WindowForeground:
  59       aColor = NS_RGB(0x00,0x00,0x00);
  60       break;
  61     case eColorID_WidgetBackground:
  62       aColor = NS_RGB(0xdd,0xdd,0xdd);
  63       break;
  64     case eColorID_WidgetForeground:
  65       aColor = NS_RGB(0x00,0x00,0x00);
  66       break;
  67     case eColorID_WidgetSelectBackground:
  68       aColor = NS_RGB(0x80,0x80,0x80);
  69       break;
  70     case eColorID_WidgetSelectForeground:
  71       aColor = NS_RGB(0x00,0x00,0x80);
  72       break;
  73     case eColorID_Widget3DHighlight:
  74       aColor = NS_RGB(0xa0,0xa0,0xa0);
  75       break;
  76     case eColorID_Widget3DShadow:
  77       aColor = NS_RGB(0x40,0x40,0x40);
  78       break;
  79     case eColorID_TextBackground:
  80       aColor = NS_RGB(0xff,0xff,0xff);
  81       break;
  82     case eColorID_TextForeground:
  83       aColor = NS_RGB(0x00,0x00,0x00);
  84       break;
  85     case eColorID_TextSelectBackground:
  86       aColor = GetColorFromNSColor([NSColor selectedTextBackgroundColor]);
  87       break;
  88     case eColorID_highlight: // CSS2 color
  89       aColor = GetColorFromNSColor([NSColor alternateSelectedControlColor]);
  90       break;
  91     case eColorID__moz_menuhover:
  92       aColor = GetColorFromNSColor([NSColor alternateSelectedControlColor]);
  93       break;
  94     case eColorID_TextSelectForeground:
  95       GetColor(eColorID_TextSelectBackground, aColor);
  96       if (aColor == 0x000000)
  97         aColor = NS_RGB(0xff,0xff,0xff);
  98       else
  99         aColor = NS_DONT_CHANGE_COLOR;
 100       break;
 101     case eColorID_highlighttext:  // CSS2 color
 102     case eColorID__moz_menuhovertext:
 103       aColor = GetColorFromNSColor([NSColor alternateSelectedControlTextColor]);
 104       break;
 105     case eColorID_IMESelectedRawTextBackground:
 106     case eColorID_IMESelectedConvertedTextBackground:
 107     case eColorID_IMERawInputBackground:
 108     case eColorID_IMEConvertedTextBackground:
 109       aColor = NS_TRANSPARENT;
 110       break;
 111     case eColorID_IMESelectedRawTextForeground:
 112     case eColorID_IMESelectedConvertedTextForeground:
 113     case eColorID_IMERawInputForeground:
 114     case eColorID_IMEConvertedTextForeground:
 115       aColor = NS_SAME_AS_FOREGROUND_COLOR;
 116       break;
 117     case eColorID_IMERawInputUnderline:
 118     case eColorID_IMEConvertedTextUnderline:
 119       aColor = NS_40PERCENT_FOREGROUND_COLOR;
 120       break;
 121     case eColorID_IMESelectedRawTextUnderline:
 122     case eColorID_IMESelectedConvertedTextUnderline:
 123       aColor = NS_SAME_AS_FOREGROUND_COLOR;
 124       break;
 125     case eColorID_SpellCheckerUnderline:
 126       aColor = NS_RGB(0xff, 0, 0);
 127       break;
 128
 129       //
 130       // css2 system colors http://www.w3.org/TR/REC-CSS2/ui.html#system-colors
 131       //
 132       // It's really hard to effectively map these to the Appearance Manager properly,
 133       // since they are modeled word for word after the win32 system colors and don't have any
 134       // real counterparts in the Mac world. I'm sure we'll be tweaking these for
 135       // years to come.
 136       //
 137       // Thanks to mpt26@student.canterbury.ac.nz for the hardcoded values that form the defaults
 138       //  if querying the Appearance Manager fails ;)
 139       //
 140     case eColorID__moz_mac_buttonactivetext:
 141     case eColorID__moz_mac_defaultbuttontext:
 142       if (nsCocoaFeatures::OnYosemiteOrLater()) {
 143         aColor = NS_RGB(0xFF,0xFF,0xFF);
 144         break;
 145       }
 146       // Otherwise fall through and return the regular button text:
 147
 148     case eColorID_buttontext:
 149     case eColorID__moz_buttonhovertext:
 150       aColor = GetColorFromNSColor([NSColor controlTextColor]);
 151       break;
 152     case eColorID_captiontext:
 153     case eColorID_menutext:
 154     case eColorID_infotext:
 155     case eColorID__moz_menubartext:
 156       aColor = GetColorFromNSColor([NSColor textColor]);
 157       break;
 158     case eColorID_windowtext:
 159       aColor = GetColorFromNSColor([NSColor windowFrameTextColor]);
 160       break;
 161     case eColorID_activecaption:
 162       aColor = GetColorFromNSColor([NSColor gridColor]);
 163       break;
 164     case eColorID_activeborder:
 165       aColor = NS_RGB(0x00,0x00,0x00);
 166       break;
 167      case eColorID_appworkspace:
 168       aColor = NS_RGB(0xFF,0xFF,0xFF);
 169       break;
 170     case eColorID_background:
 171       aColor = NS_RGB(0x63,0x63,0xCE);
 172       break;
 173     case eColorID_buttonface:
 174     case eColorID__moz_buttonhoverface:
 175       aColor = NS_RGB(0xF0,0xF0,0xF0);
 176       break;
 177     case eColorID_buttonhighlight:
 178       aColor = NS_RGB(0xFF,0xFF,0xFF);
 179       break;
 180     case eColorID_buttonshadow:
 181       aColor = NS_RGB(0xDC,0xDC,0xDC);
 182       break;
 183     case eColorID_graytext:
 184       aColor = GetColorFromNSColor([NSColor disabledControlTextColor]);
 185       break;
 186     case eColorID_inactiveborder:
 187       aColor = GetColorFromNSColor([NSColor controlBackgroundColor]);
 188       break;
 189     case eColorID_inactivecaption:
 190       aColor = GetColorFromNSColor([NSColor controlBackgroundColor]);
 191       break;
 192     case eColorID_inactivecaptiontext:
 193       aColor = NS_RGB(0x45,0x45,0x45);
 194       break;
 195     case eColorID_scrollbar:
 196       aColor = GetColorFromNSColor([NSColor scrollBarColor]);
 197       break;
 198     case eColorID_threeddarkshadow:
 199       aColor = NS_RGB(0xDC,0xDC,0xDC);
 200       break;
 201     case eColorID_threedshadow:
 202       aColor = NS_RGB(0xE0,0xE0,0xE0);
 203       break;
 204     case eColorID_threedface:
 205       aColor = NS_RGB(0xF0,0xF0,0xF0);
 206       break;
 207     case eColorID_threedhighlight:
 208       aColor = GetColorFromNSColor([NSColor highlightColor]);
 209       break;
 210     case eColorID_threedlightshadow:
 211       aColor = NS_RGB(0xDA,0xDA,0xDA);
 212       break;
 213     case eColorID_menu:
 214       aColor = GetColorFromNSColor([NSColor alternateSelectedControlTextColor]);
 215       break;
 216     case eColorID_infobackground:
 217       aColor = NS_RGB(0xFF,0xFF,0xC7);
 218       break;
 219     case eColorID_windowframe:
 220       aColor = GetColorFromNSColor([NSColor gridColor]);
 221       break;
 222     case eColorID_window:
 223     case eColorID__moz_field:
 224     case eColorID__moz_combobox:
 225       aColor = NS_RGB(0xff,0xff,0xff);
 226       break;
 227     case eColorID__moz_fieldtext:
 228     case eColorID__moz_comboboxtext:
 229       aColor = GetColorFromNSColor([NSColor controlTextColor]);
 230       break;
 231     case eColorID__moz_dialog:
 232       aColor = GetColorFromNSColor([NSColor controlHighlightColor]);
 233       break;
 234     case eColorID__moz_dialogtext:
 235     case eColorID__moz_cellhighlighttext:
 236     case eColorID__moz_html_cellhighlighttext:
 237       aColor = GetColorFromNSColor([NSColor controlTextColor]);
 238       break;
 239     case eColorID__moz_dragtargetzone:
 240       aColor = GetColorFromNSColor([NSColor selectedControlColor]);
 241       break;
 242     case eColorID__moz_mac_chrome_active:
 243     case eColorID__moz_mac_chrome_inactive: {
 244       int grey = NativeGreyColorAsInt(toolbarFillGrey, (aID == eColorID__moz_mac_chrome_active));
 245       aColor = NS_RGB(grey, grey, grey);
 246     }
 247       break;
 248     case eColorID__moz_mac_focusring:
 249       aColor = GetColorFromNSColor([NSColor keyboardFocusIndicatorColor]);
 250       break;
 251     case eColorID__moz_mac_menushadow:
 252       aColor = NS_RGB(0xA3,0xA3,0xA3);
 253       break;
 254     case eColorID__moz_mac_menutextdisable:
 255       aColor = NS_RGB(0x98,0x98,0x98);
 256       break;
 257     case eColorID__moz_mac_menutextselect:
 258       aColor = GetColorFromNSColor([NSColor selectedMenuItemTextColor]);
 259       break;
 260     case eColorID__moz_mac_disabledtoolbartext:
 261       aColor = GetColorFromNSColor([NSColor disabledControlTextColor]);
 262       break;
 263     case eColorID__moz_mac_menuselect:
 264       aColor = GetColorFromNSColor([NSColor alternateSelectedControlColor]);
 265       break;
 266     case eColorID__moz_buttondefault:
 267       aColor = NS_RGB(0xDC,0xDC,0xDC);
 268       break;
 269     case eColorID__moz_cellhighlight:
 270     case eColorID__moz_html_cellhighlight:
 271     case eColorID__moz_mac_secondaryhighlight:
 272       // For inactive list selection
 273       aColor = GetColorFromNSColor([NSColor secondarySelectedControlColor]);
 274       break;
 275     case eColorID__moz_eventreerow:
 276       // Background color of even list rows.
 277       aColor = GetColorFromNSColor([[NSColor controlAlternatingRowBackgroundColors] objectAtIndex:0]);
 278       break;
 279     case eColorID__moz_oddtreerow:
 280       // Background color of odd list rows.
 281       aColor = GetColorFromNSColor([[NSColor controlAlternatingRowBackgroundColors] objectAtIndex:1]);
 282       break;
 283     case eColorID__moz_nativehyperlinktext:
 284       // There appears to be no available system defined color. HARDCODING to the appropriate color.
 285       aColor = NS_RGB(0x14,0x4F,0xAE);
 286       break;
 287     default:
 288       NS_WARNING("Someone asked nsILookAndFeel for a color I don't know about");
 289       aColor = NS_RGB(0xff,0xff,0xff);
 290       res = NS_ERROR_FAILURE;
 291       break;
 292     }
 293
 294   return res;
 295
 296   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 297 }
 298
 299 nsresult
 300 nsLookAndFeel::GetIntImpl(IntID aID, int32_t &aResult)
 301 {
 302   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
 303
 304   nsresult res = nsXPLookAndFeel::GetIntImpl(aID, aResult);
 305   if (NS_SUCCEEDED(res))
 306     return res;
 307   res = NS_OK;
 308
 309   switch (aID) {
 310     case eIntID_CaretBlinkTime:
 311       aResult = 567;
 312       break;
 313     case eIntID_CaretWidth:
 314       aResult = 1;
 315       break;
 316     case eIntID_ShowCaretDuringSelection:
 317       aResult = 0;
 318       break;
 319     case eIntID_SelectTextfieldsOnKeyFocus:
 320       // Select textfield content when focused by kbd
 321       // used by EventStateManager::sTextfieldSelectModel
 322       aResult = 1;
 323       break;
 324     case eIntID_SubmenuDelay:
 325       aResult = 200;
 326       break;
 327     case eIntID_TooltipDelay:
 328       aResult = 500;
 329       break;
 330     case eIntID_MenusCanOverlapOSBar:
 331       // xul popups are not allowed to overlap the menubar.
 332       aResult = 0;
 333       break;
 334     case eIntID_SkipNavigatingDisabledMenuItem:
 335       aResult = 1;
 336       break;
 337     case eIntID_DragThresholdX:
 338     case eIntID_DragThresholdY:
 339       aResult = 4;
 340       break;
 341     case eIntID_ScrollArrowStyle:
 342       if (nsCocoaFeatures::OnLionOrLater()) {
 343         // OS X Lion's scrollbars have no arrows
 344         aResult = eScrollArrow_None;
 345       } else {
 346         NSString *buttonPlacement = [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleScrollBarVariant"];
 347         if ([buttonPlacement isEqualToString:@"Single"]) {
 348           aResult = eScrollArrowStyle_Single;
 349         } else if ([buttonPlacement isEqualToString:@"DoubleMin"]) {
 350           aResult = eScrollArrowStyle_BothAtTop;
 351         } else if ([buttonPlacement isEqualToString:@"DoubleBoth"]) {
 352           aResult = eScrollArrowStyle_BothAtEachEnd;
 353         } else {
 354           aResult = eScrollArrowStyle_BothAtBottom; // The default is BothAtBottom.
 355         }
 356       }
 357       break;
 358     case eIntID_ScrollSliderStyle:
 359       aResult = eScrollThumbStyle_Proportional;
 360       break;
 361     case eIntID_UseOverlayScrollbars:
 362       aResult = SystemWantsOverlayScrollbars() ? 1 : 0;
 363       break;
 364     case eIntID_AllowOverlayScrollbarsOverlap:
 365       aResult = AllowOverlayScrollbarsOverlap() ? 1 : 0;
 366       break;
 367     case eIntID_ScrollbarDisplayOnMouseMove:
 368       aResult = 0;
 369       break;
 370     case eIntID_ScrollbarFadeBeginDelay:
 371       aResult = 450;
 372       break;
 373     case eIntID_ScrollbarFadeDuration:
 374       aResult = 200;
 375       break;
 376     case eIntID_TreeOpenDelay:
 377       aResult = 1000;
 378       break;
 379     case eIntID_TreeCloseDelay:
 380       aResult = 1000;
 381       break;
 382     case eIntID_TreeLazyScrollDelay:
 383       aResult = 150;
 384       break;
 385     case eIntID_TreeScrollDelay:
 386       aResult = 100;
 387       break;
 388     case eIntID_TreeScrollLinesMax:
 389       aResult = 3;
 390       break;
 391     case eIntID_DWMCompositor:
 392     case eIntID_WindowsClassic:
 393     case eIntID_WindowsDefaultTheme:
 394     case eIntID_TouchEnabled:
 395     case eIntID_WindowsThemeIdentifier:
 396     case eIntID_OperatingSystemVersionIdentifier:
 397       aResult = 0;
 398       res = NS_ERROR_NOT_IMPLEMENTED;
 399       break;
 400     case eIntID_MacGraphiteTheme:
 401       aResult = [NSColor currentControlTint] == NSGraphiteControlTint;
 402       break;
 403     case eIntID_MacLionTheme:
 404       aResult = nsCocoaFeatures::OnLionOrLater();
 405       break;
 406     case eIntID_MacYosemiteTheme:
 407       aResult = nsCocoaFeatures::OnYosemiteOrLater();
 408       break;
 409     case eIntID_AlertNotificationOrigin:
 410       aResult = NS_ALERT_TOP;
 411       break;
 412     case eIntID_TabFocusModel:
 413     {
 414       // we should probably cache this
 415       CFPropertyListRef fullKeyboardAccessProperty;
 416       fullKeyboardAccessProperty = ::CFPreferencesCopyValue(CFSTR("AppleKeyboardUIMode"),
 417                                                             kCFPreferencesAnyApplication,
 418                                                             kCFPreferencesCurrentUser,
 419                                                             kCFPreferencesAnyHost);
 420       aResult = 1;    // default to just textboxes
 421       if (fullKeyboardAccessProperty) {
 422         int32_t fullKeyboardAccessPrefVal;
 423         if (::CFNumberGetValue((CFNumberRef) fullKeyboardAccessProperty, kCFNumberIntType, &fullKeyboardAccessPrefVal)) {
 424           // the second bit means  "Full keyboard access" is on
 425           if (fullKeyboardAccessPrefVal & (1 << 1))
 426             aResult = 7; // everything that can be focused
 427         }
 428         ::CFRelease(fullKeyboardAccessProperty);
 429       }
 430     }
 431       break;
 432     case eIntID_ScrollToClick:
 433     {
 434       aResult = [[NSUserDefaults standardUserDefaults] boolForKey:@"AppleScrollerPagingBehavior"];
 435     }
 436       break;
 437     case eIntID_ChosenMenuItemsShouldBlink:
 438       aResult = 1;
 439       break;
 440     case eIntID_IMERawInputUnderlineStyle:
 441     case eIntID_IMEConvertedTextUnderlineStyle:
 442     case eIntID_IMESelectedRawTextUnderlineStyle:
 443     case eIntID_IMESelectedConvertedTextUnderline:
 444       aResult = NS_STYLE_TEXT_DECORATION_STYLE_SOLID;
 445       break;
 446     case eIntID_SpellCheckerUnderlineStyle:
 447       aResult = NS_STYLE_TEXT_DECORATION_STYLE_DOTTED;
 448       break;
 449     case eIntID_ScrollbarButtonAutoRepeatBehavior:
 450       aResult = 0;
 451       break;
 452     case eIntID_SwipeAnimationEnabled:
 453       aResult = 0;
 454       if ([NSEvent respondsToSelector:@selector(
 455             isSwipeTrackingFromScrollEventsEnabled)]) {
 456         aResult = [NSEvent isSwipeTrackingFromScrollEventsEnabled] ? 1 : 0;
 457       }
 458       break;
 459     case eIntID_ColorPickerAvailable:
 460       aResult = 1;
 461       break;
 462     default:
 463       aResult = 0;
 464       res = NS_ERROR_FAILURE;
 465   }
 466   return res;
 467
 468   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 469 }
 470
 471 nsresult
 472 nsLookAndFeel::GetFloatImpl(FloatID aID, float &aResult)
 473 {
 474   nsresult res = nsXPLookAndFeel::GetFloatImpl(aID, aResult);
 475   if (NS_SUCCEEDED(res))
 476     return res;
 477   res = NS_OK;
 478
 479   switch (aID) {
 480     case eFloatID_IMEUnderlineRelativeSize:
 481       aResult = 2.0f;
 482       break;
 483     case eFloatID_SpellCheckerUnderlineRelativeSize:
 484       aResult = 2.0f;
 485       break;
 486     default:
 487       aResult = -1.0;
 488       res = NS_ERROR_FAILURE;
 489   }
 490
 491   return res;
 492 }
 493
 494 bool nsLookAndFeel::UseOverlayScrollbars()
 495 {
 496   return GetInt(eIntID_UseOverlayScrollbars) != 0;
 497 }
 498
 499 bool nsLookAndFeel::SystemWantsOverlayScrollbars()
 500 {
 501   return ([NSScroller respondsToSelector:@selector(preferredScrollerStyle)] &&
 502           [NSScroller preferredScrollerStyle] == mozNSScrollerStyleOverlay);
 503 }
 504
 505 bool nsLookAndFeel::AllowOverlayScrollbarsOverlap()
 506 {
 507   return (UseOverlayScrollbars() && nsCocoaFeatures::OnMountainLionOrLater());
 508 }
 509
 510 // copied from gfxQuartzFontCache.mm, maybe should go in a Cocoa utils
 511 // file somewhere
 512 static void GetStringForNSString(const NSString *aSrc, nsAString& aDest)
 513 {
 514     aDest.SetLength([aSrc length]);
 515     [aSrc getCharacters:reinterpret_cast<unichar*>(aDest.BeginWriting())];
 516 }
 517
 518 bool
 519 nsLookAndFeel::GetFontImpl(FontID aID, nsString &aFontName,
 520                            gfxFontStyle &aFontStyle,
 521                            float aDevPixPerCSSPixel)
 522 {
 523     NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
 524
 525     // hack for now
 526     if (aID == eFont_Window || aID == eFont_Document) {
 527         aFontStyle.style      = NS_FONT_STYLE_NORMAL;
 528         aFontStyle.weight     = NS_FONT_WEIGHT_NORMAL;
 529         aFontStyle.stretch    = NS_FONT_STRETCH_NORMAL;
 530         aFontStyle.size       = 14 * aDevPixPerCSSPixel;
 531         aFontStyle.systemFont = true;
 532
 533         aFontName.AssignLiteral("sans-serif");
 534         return true;
 535     }
 536
 537 /* possibilities, see NSFont Class Reference:
 538     [NSFont boldSystemFontOfSize:     0.0]
 539     [NSFont controlContentFontOfSize: 0.0]
 540     [NSFont labelFontOfSize:          0.0]
 541     [NSFont menuBarFontOfSize:        0.0]
 542     [NSFont menuFontOfSize:           0.0]
 543     [NSFont messageFontOfSize:        0.0]
 544     [NSFont paletteFontOfSize:        0.0]
 545     [NSFont systemFontOfSize:         0.0]
 546     [NSFont titleBarFontOfSize:       0.0]
 547     [NSFont toolTipsFontOfSize:       0.0]
 548     [NSFont userFixedPitchFontOfSize: 0.0]
 549     [NSFont userFontOfSize:           0.0]
 550     [NSFont systemFontOfSize:         [NSFont smallSystemFontSize]]
 551     [NSFont boldSystemFontOfSize:     [NSFont smallSystemFontSize]]
 552 */
 553
 554     NSFont *font = nullptr;
 555     switch (aID) {
 556         // css2
 557         case eFont_Caption:
 558             font = [NSFont systemFontOfSize:0.0];
 559             break;
 560         case eFont_Icon: // used in urlbar; tried labelFont, but too small
 561             font = [NSFont controlContentFontOfSize:0.0];
 562             break;
 563         case eFont_Menu:
 564             font = [NSFont systemFontOfSize:0.0];
 565             break;
 566         case eFont_MessageBox:
 567             font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 568             break;
 569         case eFont_SmallCaption:
 570             font = [NSFont boldSystemFontOfSize:[NSFont smallSystemFontSize]];
 571             break;
 572         case eFont_StatusBar:
 573             font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 574             break;
 575         // css3
 576         //case eFont_Window:     = 'sans-serif'
 577         //case eFont_Document:   = 'sans-serif'
 578         case eFont_Workspace:
 579             font = [NSFont controlContentFontOfSize:0.0];
 580             break;
 581         case eFont_Desktop:
 582             font = [NSFont controlContentFontOfSize:0.0];
 583             break;
 584         case eFont_Info:
 585             font = [NSFont controlContentFontOfSize:0.0];
 586             break;
 587         case eFont_Dialog:
 588             font = [NSFont systemFontOfSize:0.0];
 589             break;
 590         case eFont_Button:
 591             font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 592             break;
 593         case eFont_PullDownMenu:
 594             font = [NSFont menuBarFontOfSize:0.0];
 595             break;
 596         case eFont_List:
 597             font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 598             break;
 599         case eFont_Field:
 600             font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 601             break;
 602         // moz
 603         case eFont_Tooltips:
 604             font = [NSFont toolTipsFontOfSize:0.0];
 605             break;
 606         case eFont_Widget:
 607             font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 608             break;
 609         default:
 610             break;
 611     }
 612
 613     if (!font) {
 614         NS_WARNING("failed to find a system font!");
 615         return false;
 616     }
 617
 618     NSFontSymbolicTraits traits = [[font fontDescriptor] symbolicTraits];
 619     aFontStyle.style =
 620         (traits & NSFontItalicTrait) ?  NS_FONT_STYLE_ITALIC : NS_FONT_STYLE_NORMAL;
 621     aFontStyle.weight =
 622         (traits & NSFontBoldTrait) ? NS_FONT_WEIGHT_BOLD : NS_FONT_WEIGHT_NORMAL;
 623     aFontStyle.stretch =
 624         (traits & NSFontExpandedTrait) ?
 625             NS_FONT_STRETCH_EXPANDED : (traits & NSFontCondensedTrait) ?
 626                 NS_FONT_STRETCH_CONDENSED : NS_FONT_STRETCH_NORMAL;
 627     // convert size from css pixels to device pixels
 628     aFontStyle.size = [font pointSize] * aDevPixPerCSSPixel;
 629     aFontStyle.systemFont = true;
 630
 631     GetStringForNSString([font familyName], aFontName);
 632     return true;
 633
 634     NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(false);
 635 }