src/widget.c

   1 /* The emacs frame widget.
   2    Copyright (C) 1992-1993, 2000-2013 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or
   9 (at your option) any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Emacs 19 face widget ported by Fred Pierresteguy */
  20
  21 /* This file has been censored by the Communications Decency Act.
  22    That law was passed under the guise of a ban on pornography, but
  23    it bans far more than that.  This file did not contain pornography,
  24    but it was censored nonetheless.
  25
  26    For information on US government censorship of the Internet, and
  27    what you can do to bring back freedom of the press, see the web
  28    site http://www.vtw.org/
  29    */
  30
  31 #include <config.h>
  32 #include <stdio.h>
  33
  34 #include "lisp.h"
  35 #include "xterm.h"
  36
  37 #include "keyboard.h"
  38 #include "frame.h"
  39 #include "window.h"
  40
  41 #include "dispextern.h"
  42 #include "blockinput.h"
  43
  44 #include <X11/StringDefs.h>
  45 #include <X11/IntrinsicP.h>
  46 #include <X11/cursorfont.h>
  47 #include "widgetprv.h"
  48 #include <X11/ObjectP.h>
  49 #include <X11/Shell.h>
  50 #include <X11/ShellP.h>
  51 #include "../lwlib/lwlib.h"
  52
  53 #include "character.h"
  54 #include "font.h"
  55
  56 /* This sucks: this is the first default that x-faces.el tries.  This won't
  57    be used unless neither the "Emacs.EmacsFrame" resource nor the
  58    "Emacs.EmacsFrame" resource is set; the frame
  59    may have the wrong default size if this font doesn't exist, but some other
  60    font that x-faces.el does.  The workaround is to specify some font in the
  61    resource database; I don't know a solution other than duplicating the font-
  62    searching code from x-faces.el in this file.
  63
  64    This also means that if "Emacs.EmacsFrame" is specified as a non-
  65    existent font, then Xt is going to substitute "XtDefaultFont" for it,
  66    which is a different size than this one.  The solution for this is to
  67    make x-faces.el try to use XtDefaultFont.  The problem with that is that
  68    XtDefaultFont is almost certainly variable-width.
  69
  70    #### Perhaps we could have this code explicitly set XtDefaultFont to this?
  71  */
  72 #define DEFAULT_FACE_FONT "-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-*"
  73
  74
  75 static void EmacsFrameInitialize (Widget request, Widget new, ArgList dum1, Cardinal *dum2);
  76 static void EmacsFrameDestroy (Widget widget);
  77 static void EmacsFrameRealize (Widget widget, XtValueMask *mask, XSetWindowAttributes *attrs);
  78 static void EmacsFrameResize (Widget widget);
  79 static Boolean EmacsFrameSetValues (Widget cur_widget, Widget req_widget, Widget new_widget, ArgList dum1, Cardinal *dum2);
  80 static XtGeometryResult EmacsFrameQueryGeometry (Widget widget, XtWidgetGeometry *request, XtWidgetGeometry *result);
  81
  82
  83 #undef XtOffset
  84 #define XtOffset(p_type,field) \
  85         ((Cardinal) (((char *) (&(((p_type)0)->field))) - ((char *)0)))
  86 #define offset(field) XtOffset (EmacsFrame, emacs_frame.field)
  87
  88 static XtResource resources[] = {
  89   {XtNgeometry, XtCGeometry, XtRString, sizeof (String),
  90      offset (geometry), XtRString, (XtPointer) 0},
  91   {XtNiconic, XtCIconic, XtRBoolean, sizeof (Boolean),
  92      offset (iconic), XtRImmediate, (XtPointer) False},
  93
  94   {XtNemacsFrame, XtCEmacsFrame, XtRPointer, sizeof (XtPointer),
  95      offset (frame), XtRImmediate, 0},
  96
  97   {XtNminibuffer, XtCMinibuffer, XtRInt, sizeof (int),
  98      offset (minibuffer), XtRImmediate, (XtPointer)0},
  99   {XtNunsplittable, XtCUnsplittable, XtRBoolean, sizeof (Boolean),
 100      offset (unsplittable), XtRImmediate, (XtPointer)0},
 101   {XtNinternalBorderWidth, XtCInternalBorderWidth, XtRInt, sizeof (int),
 102      offset (internal_border_width), XtRImmediate, (XtPointer)4},
 103   {XtNinterline, XtCInterline, XtRInt, sizeof (int),
 104      offset (interline), XtRImmediate, (XtPointer)0},
 105   {XtNfont,  XtCFont, XtRFontStruct, sizeof (struct font *),
 106      offset (font),XtRString, DEFAULT_FACE_FONT},
 107   {XtNforeground, XtCForeground, XtRPixel, sizeof (Pixel),
 108      offset (foreground_pixel), XtRString, "XtDefaultForeground"},
 109   {XtNcursorColor, XtCForeground, XtRPixel, sizeof (Pixel),
 110      offset (cursor_color), XtRString, "XtDefaultForeground"},
 111   {XtNbarCursor, XtCBarCursor, XtRBoolean, sizeof (Boolean),
 112      offset (bar_cursor), XtRImmediate, (XtPointer)0},
 113   {XtNvisualBell, XtCVisualBell, XtRBoolean, sizeof (Boolean),
 114      offset (visual_bell), XtRImmediate, (XtPointer)0},
 115   {XtNbellVolume, XtCBellVolume, XtRInt, sizeof (int),
 116      offset (bell_volume), XtRImmediate, (XtPointer)0},
 117 };
 118
 119 #undef offset
 120
 121 /*
 122 static XtActionsRec
 123 emacsFrameActionsTable [] = {
 124   {"keypress",  key_press},
 125   {"focus_in",  emacs_frame_focus_handler},
 126   {"focus_out", emacs_frame_focus_handler},
 127 };
 128
 129 static char
 130 emacsFrameTranslations [] = "\
 131 <KeyPress>: keypress()\n\
 132 <FocusIn>:  focus_in()\n\
 133 <FocusOut>: focus_out()\n\
 134 ";
 135 */
 136
 137 static EmacsFrameClassRec emacsFrameClassRec = {
 138     { /* core fields */
 139     /* superclass               */      &widgetClassRec,
 140     /* class_name               */      "EmacsFrame",
 141     /* widget_size              */      sizeof (EmacsFrameRec),
 142     /* class_initialize         */      0,
 143     /* class_part_initialize    */      0,
 144     /* class_inited             */      FALSE,
 145     /* initialize               */      EmacsFrameInitialize,
 146     /* initialize_hook          */      0,
 147     /* realize                  */      EmacsFrameRealize,
 148     /* actions                  */      0, /*emacsFrameActionsTable*/
 149     /* num_actions              */      0, /*XtNumber (emacsFrameActionsTable)*/
 150     /* resources                */      resources,
 151     /* resource_count           */      XtNumber (resources),
 152     /* xrm_class                */      NULLQUARK,
 153     /* compress_motion          */      TRUE,
 154     /* compress_exposure        */      TRUE,
 155     /* compress_enterleave      */      TRUE,
 156     /* visible_interest         */      FALSE,
 157     /* destroy                  */      EmacsFrameDestroy,
 158     /* resize                   */      EmacsFrameResize,
 159     /* expose                   */      XtInheritExpose,
 160     /* set_values               */      EmacsFrameSetValues,
 161     /* set_values_hook          */      0,
 162     /* set_values_almost        */      XtInheritSetValuesAlmost,
 163     /* get_values_hook          */      0,
 164     /* accept_focus             */      XtInheritAcceptFocus,
 165     /* version                  */      XtVersion,
 166     /* callback_private         */      0,
 167     /* tm_table                 */      0, /*emacsFrameTranslations*/
 168     /* query_geometry           */      EmacsFrameQueryGeometry,
 169     /* display_accelerator      */      XtInheritDisplayAccelerator,
 170     /* extension                */      0
 171     }
 172 };
 173
 174 WidgetClass emacsFrameClass = (WidgetClass) &emacsFrameClassRec;
 175
 176 static void
 177 get_default_char_pixel_size (EmacsFrame ew, int *pixel_width, int *pixel_height)
 178 {
 179   struct frame* f = ew->emacs_frame.frame;
 180   *pixel_width = FRAME_COLUMN_WIDTH (f);
 181   *pixel_height = FRAME_LINE_HEIGHT (f);
 182 }
 183
 184 static void
 185 pixel_to_char_size (EmacsFrame ew, Dimension pixel_width, Dimension pixel_height, int *char_width, int *char_height)
 186 {
 187   struct frame* f = ew->emacs_frame.frame;
 188   *char_width = FRAME_PIXEL_WIDTH_TO_TEXT_COLS (f, (int) pixel_width);
 189   *char_height = FRAME_PIXEL_HEIGHT_TO_TEXT_LINES (f, (int) pixel_height);
 190 }
 191
 192 static void
 193 char_to_pixel_size (EmacsFrame ew, int char_width, int char_height, Dimension *pixel_width, Dimension *pixel_height)
 194 {
 195   struct frame* f = ew->emacs_frame.frame;
 196   *pixel_width = FRAME_TEXT_COLS_TO_PIXEL_WIDTH (f, char_width);
 197   *pixel_height = FRAME_TEXT_LINES_TO_PIXEL_HEIGHT (f, char_height);
 198 }
 199
 200 static void
 201 round_size_to_char (EmacsFrame ew, Dimension in_width, Dimension in_height, Dimension *out_width, Dimension *out_height)
 202 {
 203   int char_width;
 204   int char_height;
 205   pixel_to_char_size (ew, in_width, in_height, &char_width, &char_height);
 206   char_to_pixel_size (ew, char_width, char_height, out_width, out_height);
 207 }
 208
 209 static Widget
 210 get_wm_shell (Widget w)
 211 {
 212   Widget wmshell;
 213
 214   for (wmshell = XtParent (w);
 215        wmshell && !XtIsWMShell (wmshell);
 216        wmshell = XtParent (wmshell));
 217
 218   return wmshell;
 219 }
 220
 221 #if 0 /* Currently not used.  */
 222
 223 static void
 224 mark_shell_size_user_specified (Widget wmshell)
 225 {
 226   if (! XtIsWMShell (wmshell)) emacs_abort ();
 227   /* This is kind of sleazy, but I can't see how else to tell it to make it
 228      mark the WM_SIZE_HINTS size as user specified when appropriate. */
 229   ((WMShellWidget) wmshell)->wm.size_hints.flags |= USSize;
 230 }
 231
 232 #endif
 233
 234
 235 /* Can't have static frame locals because of some broken compilers.
 236    Normally, initializing a variable like this doesn't work in emacs,
 237    but it's ok in this file because it must come after lastfile (and
 238    thus have its data not go into text space) because Xt needs to
 239    write to initialized data objects too.
 240  */
 241 #if 0
 242 static Boolean first_frame_p = True;
 243 #endif
 244
 245 static void
 246 set_frame_size (EmacsFrame ew)
 247 {
 248   /* The widget hierarchy is
 249
 250         argv[0]                 emacsShell      pane    Frame-NAME
 251         ApplicationShell        EmacsShell      Paned   EmacsFrame
 252
 253      We accept geometry specs in this order:
 254
 255         *Frame-NAME.geometry
 256         *EmacsFrame.geometry
 257         Emacs.geometry
 258
 259      Other possibilities for widget hierarchies might be
 260
 261         argv[0]                 frame           pane    Frame-NAME
 262         ApplicationShell        EmacsShell      Paned   EmacsFrame
 263      or
 264         argv[0]                 Frame-NAME      pane    Frame-NAME
 265         ApplicationShell        EmacsShell      Paned   EmacsFrame
 266      or
 267         argv[0]                 Frame-NAME      pane    emacsTextPane
 268         ApplicationShell        EmacsFrame      Paned   EmacsTextPane
 269
 270      With the current setup, the text-display-area is the part which is
 271      an emacs "frame", since that's the only part managed by emacs proper
 272      (the menubar and the parent of the menubar and all that sort of thing
 273      are managed by lwlib.)
 274
 275      The EmacsShell widget is simply a replacement for the Shell widget
 276      which is able to deal with using an externally-supplied window instead
 277      of always creating its own.  It is not actually emacs specific, and
 278      should possibly have class "Shell" instead of "EmacsShell" to simplify
 279      the resources.
 280
 281    */
 282
 283   /* Hairily merged geometry */
 284   unsigned int w = FRAME_COLS (ew->emacs_frame.frame);
 285   unsigned int h = FRAME_LINES (ew->emacs_frame.frame);
 286
 287   Widget wmshell = get_wm_shell ((Widget) ew);
 288   /* Each Emacs shell is now independent and top-level.  */
 289
 290   if (! XtIsSubclass (wmshell, shellWidgetClass)) emacs_abort ();
 291
 292   /* We don't need this for the moment. The geometry is computed in
 293      xfns.c.  */
 294 #if 0
 295   /* If the EmacsFrame doesn't have a geometry but the shell does,
 296      treat that as the geometry of the frame.  (Is this bogus?
 297      I'm not sure.) */
 298   if (ew->emacs_frame.geometry == 0)
 299     XtVaGetValues (wmshell, XtNgeometry, &ew->emacs_frame.geometry, NULL);
 300
 301   /* If the Shell is iconic, then the EmacsFrame is iconic.  (Is
 302      this bogus? I'm not sure.) */
 303   if (!ew->emacs_frame.iconic)
 304     XtVaGetValues (wmshell, XtNiconic, &ew->emacs_frame.iconic, NULL);
 305
 306
 307   {
 308     char *geom = 0;
 309     XtVaGetValues (app_shell, XtNgeometry, &geom, NULL);
 310     if (geom)
 311       app_flags = XParseGeometry (geom, &app_x, &app_y, &app_w, &app_h);
 312   }
 313
 314   if (ew->emacs_frame.geometry)
 315     frame_flags = XParseGeometry (ew->emacs_frame.geometry,
 316                                    &frame_x, &frame_y,
 317                                    &frame_w, &frame_h);
 318
 319   if (first_frame_p)
 320     {
 321       /* If this is the first frame created:
 322          ====================================
 323
 324          - Use the ApplicationShell's size/position, if specified.
 325            (This is "Emacs.geometry", or the "-geometry" command line arg.)
 326          - Else use the EmacsFrame's size/position.
 327            (This is "*Frame-NAME.geometry")
 328
 329          - If the AppShell is iconic, the frame should be iconic.
 330
 331          AppShell comes first so that -geometry always applies to the first
 332          frame created, even if there is an "every frame" entry in the
 333          resource database.
 334        */
 335       if (app_flags & (XValue | YValue))
 336         {
 337           x = app_x; y = app_y;
 338           flags |= (app_flags & (XValue | YValue | XNegative | YNegative));
 339         }
 340       else if (frame_flags & (XValue | YValue))
 341         {
 342           x = frame_x; y = frame_y;
 343           flags |= (frame_flags & (XValue | YValue | XNegative | YNegative));
 344         }
 345
 346       if (app_flags & (WidthValue | HeightValue))
 347         {
 348           w = app_w; h = app_h;
 349           flags |= (app_flags & (WidthValue | HeightValue));
 350         }
 351       else if (frame_flags & (WidthValue | HeightValue))
 352         {
 353           w = frame_w; h = frame_h;
 354           flags |= (frame_flags & (WidthValue | HeightValue));
 355         }
 356
 357       /* If the AppShell is iconic, then the EmacsFrame is iconic. */
 358       if (!ew->emacs_frame.iconic)
 359         XtVaGetValues (app_shell, XtNiconic, &ew->emacs_frame.iconic, NULL);
 360
 361       first_frame_p = False;
 362     }
 363   else
 364     {
 365       /* If this is not the first frame created:
 366          ========================================
 367
 368          - use the EmacsFrame's size/position if specified
 369          - Otherwise, use the ApplicationShell's size, but not position.
 370
 371          So that means that one can specify the position of the first frame
 372          with "Emacs.geometry" or `-geometry'; but can only specify the
 373          position of subsequent frames with "*Frame-NAME.geometry".
 374
 375          AppShell comes second so that -geometry does not apply to subsequent
 376          frames when there is an "every frame" entry in the resource db,
 377          but does apply to the first frame.
 378        */
 379       if (frame_flags & (XValue | YValue))
 380         {
 381           x = frame_x; y = frame_y;
 382           flags |= (frame_flags & (XValue | YValue | XNegative | YNegative));
 383         }
 384
 385       if (frame_flags & (WidthValue | HeightValue))
 386         {
 387           w = frame_w; h = frame_h;
 388           flags |= (frame_flags & (WidthValue | HeightValue));
 389         }
 390       else if (app_flags & (WidthValue | HeightValue))
 391         {
 392           w = app_w;
 393           h = app_h;
 394           flags |= (app_flags & (WidthValue | HeightValue));
 395         }
 396     }
 397 #endif /* 0 */
 398   {
 399     struct frame *f = ew->emacs_frame.frame;
 400     Dimension pixel_width, pixel_height;
 401
 402     /* Take into account the size of the scrollbar.  Always use the
 403        number of columns occupied by the scroll bar here otherwise we
 404        might end up with a frame width that is not a multiple of the
 405        frame's character width which is bad for vertically split
 406        windows.  */
 407     f->scroll_bar_actual_width
 408       = FRAME_SCROLL_BAR_COLS (f) * FRAME_COLUMN_WIDTH (f);
 409
 410     compute_fringe_widths (f, 0);
 411
 412 #if 0 /* This can run Lisp code, and it is dangerous to give
 413          out the frame to Lisp code before it officially exists.
 414          This is handled in Fx_create_frame so not needed here.  */
 415     change_frame_size (f, h, w, 1, 0, 0);
 416 #endif
 417     char_to_pixel_size (ew, w, h, &pixel_width, &pixel_height);
 418     ew->core.width = pixel_width;
 419     ew->core.height = pixel_height;
 420
 421 #if 0 /* xfns.c takes care of this now.  */
 422     /* If a position was specified, assign it to the shell widget.
 423        (Else WM won't do anything with it.)
 424      */
 425     if (flags & (XValue | YValue))
 426       {
 427         /* the tricky things with the sign is to make sure that
 428            -0 is printed -0. */
 429         sprintf (shell_position, "=%c%d%c%d",
 430                  flags & XNegative ? '-' : '+', x < 0 ? -x : x,
 431                  flags & YNegative ? '-' : '+', y < 0 ? -y : y);
 432         XtVaSetValues (wmshell, XtNgeometry, xstrdup (shell_position), NULL);
 433       }
 434     else if (flags & (WidthValue | HeightValue))
 435       {
 436         sprintf (shell_position, "=%dx%d", pixel_width, pixel_height);
 437         XtVaSetValues (wmshell, XtNgeometry, xstrdup (shell_position), NULL);
 438       }
 439
 440     /* If the geometry spec we're using has W/H components, mark the size
 441        in the WM_SIZE_HINTS as user specified. */
 442     if (flags & (WidthValue | HeightValue))
 443       mark_shell_size_user_specified (wmshell);
 444
 445     /* Also assign the iconic status of the frame to the Shell, so that
 446        the WM sees it. */
 447     XtVaSetValues (wmshell, XtNiconic, ew->emacs_frame.iconic, NULL);
 448 #endif /* 0 */
 449   }
 450 }
 451
 452 static void
 453 update_wm_hints (EmacsFrame ew)
 454 {
 455   Widget wmshell = get_wm_shell ((Widget)ew);
 456   int cw;
 457   int ch;
 458   Dimension rounded_width;
 459   Dimension rounded_height;
 460   int char_width;
 461   int char_height;
 462   int base_width;
 463   int base_height;
 464   int min_rows = 0, min_cols = 0;
 465
 466   /* This happens when the frame is just created.  */
 467   if (! wmshell) return;
 468
 469 #if 0
 470   check_frame_size (ew->emacs_frame.frame, &min_rows, &min_cols);
 471 #endif
 472
 473   pixel_to_char_size (ew, ew->core.width, ew->core.height,
 474                       &char_width, &char_height);
 475   char_to_pixel_size (ew, char_width, char_height,
 476                       &rounded_width, &rounded_height);
 477   get_default_char_pixel_size (ew, &cw, &ch);
 478
 479   base_width = (wmshell->core.width - ew->core.width
 480                 + (rounded_width - (char_width * cw)));
 481   base_height = (wmshell->core.height - ew->core.height
 482                 + (rounded_height - (char_height * ch)));
 483
 484   /* This is kind of sleazy, but I can't see how else to tell it to
 485      make it mark the WM_SIZE_HINTS size as user specified.
 486    */
 487 /*  ((WMShellWidget) wmshell)->wm.size_hints.flags |= USSize;*/
 488
 489   XtVaSetValues (wmshell,
 490                  XtNbaseWidth, (XtArgVal) base_width,
 491                  XtNbaseHeight, (XtArgVal) base_height,
 492                  XtNwidthInc, (XtArgVal) cw,
 493                  XtNheightInc, (XtArgVal) ch,
 494                  XtNminWidth, (XtArgVal) (base_width + min_cols * cw),
 495                  XtNminHeight, (XtArgVal) (base_height + min_rows * ch),
 496                  NULL);
 497 }
 498
 499 void
 500 widget_update_wm_size_hints (Widget widget)
 501 {
 502   EmacsFrame ew = (EmacsFrame)widget;
 503   update_wm_hints (ew);
 504 }
 505
 506
 507 #if 0
 508
 509 static void
 510 create_frame_gcs (EmacsFrame ew)
 511 {
 512   struct frame *s = ew->emacs_frame.frame;
 513
 514   s->output_data.x->normal_gc
 515     = XCreateGC (XtDisplay (ew), RootWindowOfScreen (XtScreen (ew)), 0, 0);
 516   s->output_data.x->reverse_gc
 517     = XCreateGC (XtDisplay (ew), RootWindowOfScreen (XtScreen (ew)), 0, 0);
 518   s->output_data.x->cursor_gc
 519     = XCreateGC (XtDisplay (ew), RootWindowOfScreen (XtScreen (ew)), 0, 0);
 520   s->output_data.x->black_relief.gc = 0;
 521   s->output_data.x->white_relief.gc = 0;
 522 }
 523
 524 #endif /* 0 */
 525
 526 static char setup_frame_cursor_bits[] =
 527 {
 528   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 529   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 530   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 531   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 532 };
 533
 534 static void
 535 setup_frame_gcs (EmacsFrame ew)
 536 {
 537   XGCValues gc_values;
 538   struct frame* s = ew->emacs_frame.frame;
 539   Pixmap blank_stipple, blank_tile;
 540   unsigned long valuemask = (GCForeground | GCBackground | GCGraphicsExposures
 541                              | GCStipple | GCTile);
 542   Lisp_Object font;
 543
 544   XSETFONT (font, ew->emacs_frame.font);
 545   font = Ffont_xlfd_name (font, Qnil);
 546   if (STRINGP (font))
 547     {
 548       XFontStruct *xfont = XLoadQueryFont (FRAME_X_DISPLAY_INFO (s)->display,
 549                                            SSDATA (font));
 550       if (xfont)
 551         {
 552           gc_values.font = xfont->fid;
 553           valuemask |= GCFont;
 554         }
 555     }
 556
 557   /* We have to initialize all of our GCs to have a stipple/tile, otherwise
 558      XGetGCValues returns uninitialized data when we query the stipple
 559      (instead of None or something sensible) and it makes things hard.
 560
 561      This should be fixed for real by not querying the GCs but instead having
 562      some GC-based cache instead of the current face-based cache which doesn't
 563      effectively cache all of the GC settings we need to use.
 564    */
 565
 566   blank_stipple
 567     = XCreateBitmapFromData (XtDisplay (ew),
 568                              RootWindowOfScreen (XtScreen (ew)),
 569                              setup_frame_cursor_bits, 2, 2);
 570
 571   /* use fg = 0, bg = 1 below, but it's irrelevant since this pixmap should
 572      never actually get used as a background tile!
 573    */
 574   blank_tile
 575     = XCreatePixmapFromBitmapData (XtDisplay (ew),
 576                                    RootWindowOfScreen (XtScreen (ew)),
 577                                    setup_frame_cursor_bits, 2, 2,
 578                                    0, 1, ew->core.depth);
 579
 580   /* Normal video */
 581   gc_values.foreground = ew->emacs_frame.foreground_pixel;
 582   gc_values.background = ew->core.background_pixel;
 583   gc_values.graphics_exposures = False;
 584   gc_values.stipple = blank_stipple;
 585   gc_values.tile = blank_tile;
 586   XChangeGC (XtDisplay (ew), s->output_data.x->normal_gc,
 587              valuemask, &gc_values);
 588
 589   /* Reverse video style. */
 590   gc_values.foreground = ew->core.background_pixel;
 591   gc_values.background = ew->emacs_frame.foreground_pixel;
 592   gc_values.graphics_exposures = False;
 593   gc_values.stipple = blank_stipple;
 594   gc_values.tile = blank_tile;
 595   XChangeGC (XtDisplay (ew), s->output_data.x->reverse_gc,
 596              valuemask, &gc_values);
 597
 598   /* Cursor has to have an empty stipple. */
 599   gc_values.foreground = ew->core.background_pixel;
 600   gc_values.background = ew->emacs_frame.cursor_color;
 601   gc_values.graphics_exposures = False;
 602   gc_values.tile = blank_tile;
 603   gc_values.stipple
 604     = XCreateBitmapFromData (XtDisplay (ew),
 605                              RootWindowOfScreen (XtScreen (ew)),
 606                              setup_frame_cursor_bits, 16, 16);
 607   XChangeGC (XtDisplay (ew), s->output_data.x->cursor_gc,
 608              valuemask, &gc_values);
 609 }
 610
 611 static void
 612 update_various_frame_slots (EmacsFrame ew)
 613 {
 614   struct frame *f = ew->emacs_frame.frame;
 615   struct x_output *x = f->output_data.x;
 616   FRAME_PIXEL_HEIGHT (f) = ew->core.height + x->menubar_height;
 617   FRAME_PIXEL_WIDTH (f) = ew->core.width;
 618   f->internal_border_width = ew->emacs_frame.internal_border_width;
 619
 620 }
 621
 622 static void
 623 update_from_various_frame_slots (EmacsFrame ew)
 624 {
 625   struct frame *f = ew->emacs_frame.frame;
 626   struct x_output *x = f->output_data.x;
 627   ew->core.height = FRAME_PIXEL_HEIGHT (f) - x->menubar_height;
 628   ew->core.width = FRAME_PIXEL_WIDTH (f);
 629   ew->core.background_pixel = FRAME_BACKGROUND_PIXEL (f);
 630   ew->emacs_frame.internal_border_width = f->internal_border_width;
 631   ew->emacs_frame.font = x->font;
 632   ew->emacs_frame.foreground_pixel = FRAME_FOREGROUND_PIXEL (f);
 633   ew->emacs_frame.cursor_color = x->cursor_pixel;
 634   ew->core.border_pixel = x->border_pixel;
 635 }
 636
 637 static void
 638 EmacsFrameInitialize (Widget request, Widget new, ArgList dum1, Cardinal *dum2)
 639 {
 640   EmacsFrame ew = (EmacsFrame)new;
 641
 642   if (!ew->emacs_frame.frame)
 643     {
 644       fprintf (stderr,
 645                "can't create an emacs frame widget without a frame\n");
 646       exit (1);
 647     }
 648
 649   update_from_various_frame_slots (ew);
 650   set_frame_size (ew);
 651 }
 652
 653 static void
 654 resize_cb (Widget widget,
 655            XtPointer closure,
 656            XEvent* event,
 657            Boolean* continue_to_dispatch)
 658 {
 659   EmacsFrameResize (widget);
 660 }
 661
 662
 663 static void
 664 EmacsFrameRealize (Widget widget, XtValueMask *mask, XSetWindowAttributes *attrs)
 665 {
 666   EmacsFrame ew = (EmacsFrame)widget;
 667
 668   /* This used to contain SubstructureRedirectMask, but this turns out
 669      to be a problem with XIM on Solaris, and events from that mask
 670      don't seem to be used.  Let's check that.  */
 671   attrs->event_mask = (STANDARD_EVENT_SET
 672                        | PropertyChangeMask
 673                        | SubstructureNotifyMask);
 674   *mask |= CWEventMask;
 675   XtCreateWindow (widget, InputOutput, (Visual *)CopyFromParent, *mask,
 676                   attrs);
 677   /* Some ConfigureNotify events does not end up in EmacsFrameResize so
 678      make sure we get them all.  Seen with xfcwm4 for example.  */
 679   XtAddRawEventHandler (widget, StructureNotifyMask, False, resize_cb, NULL);
 680   update_wm_hints (ew);
 681 }
 682
 683 static void
 684 EmacsFrameDestroy (Widget widget)
 685 {
 686   EmacsFrame ew = (EmacsFrame) widget;
 687   struct frame* s = ew->emacs_frame.frame;
 688
 689   if (! s) emacs_abort ();
 690   if (! s->output_data.x) emacs_abort ();
 691
 692   block_input ();
 693   x_free_gcs (s);
 694   if (s->output_data.x->white_relief.gc)
 695     XFreeGC (XtDisplay (widget), s->output_data.x->white_relief.gc);
 696   if (s->output_data.x->black_relief.gc)
 697     XFreeGC (XtDisplay (widget), s->output_data.x->black_relief.gc);
 698   unblock_input ();
 699 }
 700
 701 static void
 702 EmacsFrameResize (Widget widget)
 703 {
 704   EmacsFrame ew = (EmacsFrame)widget;
 705   struct frame *f = ew->emacs_frame.frame;
 706   struct x_output *x = f->output_data.x;
 707   int columns;
 708   int rows;
 709
 710   pixel_to_char_size (ew, ew->core.width, ew->core.height, &columns, &rows);
 711   if (columns != FRAME_COLS (f)
 712       || rows != FRAME_LINES (f)
 713       || ew->core.width != FRAME_PIXEL_WIDTH (f)
 714       || ew->core.height + x->menubar_height != FRAME_PIXEL_HEIGHT (f))
 715     {
 716       change_frame_size (f, rows, columns, 0, 1, 0);
 717       update_wm_hints (ew);
 718       update_various_frame_slots (ew);
 719
 720       cancel_mouse_face (f);
 721     }
 722 }
 723
 724 static Boolean
 725 EmacsFrameSetValues (Widget cur_widget, Widget req_widget, Widget new_widget, ArgList dum1, Cardinal *dum2)
 726 {
 727   EmacsFrame cur = (EmacsFrame)cur_widget;
 728   EmacsFrame new = (EmacsFrame)new_widget;
 729
 730   Boolean needs_a_refresh = False;
 731   Boolean has_to_recompute_size;
 732   Boolean has_to_recompute_gcs;
 733   Boolean has_to_update_hints;
 734
 735   int char_width, char_height;
 736   Dimension pixel_width;
 737   Dimension pixel_height;
 738
 739   /* AFAIK, this function is never called. -- Jan D, Oct 2009.  */
 740   has_to_recompute_gcs = (cur->emacs_frame.font != new->emacs_frame.font
 741                           || (cur->emacs_frame.foreground_pixel
 742                               != new->emacs_frame.foreground_pixel)
 743                           || (cur->core.background_pixel
 744                               != new->core.background_pixel)
 745                           );
 746
 747   has_to_recompute_size = (cur->emacs_frame.font != new->emacs_frame.font
 748                            && cur->core.width == new->core.width
 749                            && cur->core.height == new->core.height);
 750
 751   has_to_update_hints = (cur->emacs_frame.font != new->emacs_frame.font);
 752
 753   if (has_to_recompute_gcs)
 754     {
 755       setup_frame_gcs (new);
 756       needs_a_refresh = True;
 757     }
 758
 759   if (has_to_recompute_size)
 760     {
 761       pixel_width = new->core.width;
 762       pixel_height = new->core.height;
 763       pixel_to_char_size (new, pixel_width, pixel_height, &char_width,
 764                           &char_height);
 765       char_to_pixel_size (new, char_width, char_height, &pixel_width,
 766                           &pixel_height);
 767       new->core.width = pixel_width;
 768       new->core.height = pixel_height;
 769
 770       change_frame_size (new->emacs_frame.frame, char_height, char_width,
 771                           1, 0, 0);
 772       needs_a_refresh = True;
 773     }
 774
 775   if (has_to_update_hints)
 776     update_wm_hints (new);
 777
 778   update_various_frame_slots (new);
 779
 780   /* #### This doesn't work, I haven't been able to find ANY kludge that
 781      will let (x-create-frame '((iconic . t))) work.  It seems that changes
 782      to wm_shell's iconic slot have no effect after it has been realized,
 783      and calling XIconifyWindow doesn't work either (even though the window
 784      has been created.)  Perhaps there is some property we could smash
 785      directly, but I'm sick of this for now.
 786    */
 787   if (cur->emacs_frame.iconic != new->emacs_frame.iconic)
 788     {
 789       Widget wmshell = get_wm_shell ((Widget) cur);
 790       XtVaSetValues (wmshell, XtNiconic,
 791                      (XtArgVal) new->emacs_frame.iconic, NULL);
 792     }
 793
 794   return needs_a_refresh;
 795 }
 796
 797 static XtGeometryResult
 798 EmacsFrameQueryGeometry (Widget widget, XtWidgetGeometry *request, XtWidgetGeometry *result)
 799 {
 800   EmacsFrame ew = (EmacsFrame)widget;
 801
 802   int mask = request->request_mode;
 803   Dimension ok_width, ok_height;
 804
 805   if (mask & (CWWidth | CWHeight))
 806     {
 807       round_size_to_char (ew,
 808                           (mask & CWWidth) ? request->width : ew->core.width,
 809                           ((mask & CWHeight) ? request->height
 810                            : ew->core.height),
 811                           &ok_width, &ok_height);
 812       if ((mask & CWWidth) && (ok_width != request->width))
 813         {
 814           result->request_mode |= CWWidth;
 815           result->width = ok_width;
 816         }
 817       if ((mask & CWHeight) && (ok_height != request->height))
 818         {
 819           result->request_mode |= CWHeight;
 820           result->height = ok_height;
 821         }
 822     }
 823   return result->request_mode ? XtGeometryAlmost : XtGeometryYes;
 824 }
 825
 826 /* Special entry points */
 827 void
 828 EmacsFrameSetCharSize (Widget widget, int columns, int rows)
 829 {
 830   EmacsFrame ew = (EmacsFrame) widget;
 831   struct frame *f = ew->emacs_frame.frame;
 832
 833   x_set_window_size (f, 0, columns, rows);
 834 }
 835
 836 \f
 837 void
 838 widget_store_internal_border (Widget widget)
 839 {
 840   EmacsFrame ew = (EmacsFrame) widget;
 841   FRAME_PTR f = ew->emacs_frame.frame;
 842
 843   ew->emacs_frame.internal_border_width = f->internal_border_width;
 844 }