XEmacs / src / gtk-xemacs.c

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
/* gtk-xemacs.c
**
** Description: A widget to encapsulate a XEmacs 'text widget'
**
** Created by: William M. Perry
** Copyright (c) 2000 William M. Perry <wmperry@gnu.org>
** Copyright (C) 2010 Ben Wing.
**
** This file is part of XEmacs.
**
** XEmacs is free software; you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by the
** Free Software Foundation; either version 2, or (at your option) any
** later version.
**
** XEmacs is distributed in the hope that it will be useful, but WITHOUT
** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
** FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
** for more details.
**
** You should have received a copy of the GNU General Public License
** along with XEmacs; see the file COPYING.  If not, write to
** the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
** Boston, MA 02110-1301, USA.  */

#include <config.h>

#include "lisp.h"

#include "device.h"
#include "faces.h"
#include "glyphs.h"
#include "window.h"

#include "frame-impl.h"
#include "console-gtk-impl.h"
#include "device-impl.h"
#include "gtk-xemacs.h"
#include "fontcolor-gtk.h"

extern Lisp_Object Vmodeline_face;
extern Lisp_Object Vscrollbar_on_left_p;

EXFUN (Fmake_image_instance, 4);

static void gtk_xemacs_class_init	(GtkXEmacsClass *klass);
static void gtk_xemacs_init		(GtkXEmacs *xemacs);
static void gtk_xemacs_size_allocate	(GtkWidget *widget, GtkAllocation *allocaction);
static void gtk_xemacs_draw		(GtkWidget *widget, GdkRectangle *area);
static void gtk_xemacs_paint		(GtkWidget *widget, GdkRectangle *area);
static void gtk_xemacs_size_request	(GtkWidget *widget, GtkRequisition *requisition);
static void gtk_xemacs_realize		(GtkWidget *widget);
static void gtk_xemacs_style_set        (GtkWidget *widget, GtkStyle *previous_style);
static gint gtk_xemacs_expose		(GtkWidget *widget, GdkEventExpose *event);

guint
gtk_xemacs_get_type (void)
{
  static guint xemacs_type = 0;

  if (!xemacs_type)
    {
      static const GtkTypeInfo xemacs_info =
      {
	"GtkXEmacs",
	sizeof (GtkXEmacs),
	sizeof (GtkXEmacsClass),
	(GtkClassInitFunc) gtk_xemacs_class_init,
	(GtkObjectInitFunc) gtk_xemacs_init,
	/* reserved_1 */ NULL,
        /* reserved_2 */ NULL,
        (GtkClassInitFunc) NULL,
      };

      xemacs_type = gtk_type_unique (gtk_fixed_get_type (), &xemacs_info);
    }

  return xemacs_type;
}

static GtkWidgetClass *parent_class;

static void
gtk_xemacs_class_init (GtkXEmacsClass *class_)
{
  GtkWidgetClass *widget_class;

  widget_class = (GtkWidgetClass*) class_;
  parent_class = (GtkWidgetClass *) gtk_type_class (gtk_fixed_get_type ());

  widget_class->size_allocate = gtk_xemacs_size_allocate;
  widget_class->size_request = gtk_xemacs_size_request;
  widget_class->draw = gtk_xemacs_draw;
  widget_class->expose_event = gtk_xemacs_expose;
  widget_class->realize = gtk_xemacs_realize;
  widget_class->button_press_event = emacs_gtk_button_event_handler;
  widget_class->button_release_event = emacs_gtk_button_event_handler;
  widget_class->key_press_event = emacs_gtk_key_event_handler;
  widget_class->key_release_event = emacs_gtk_key_event_handler;
  widget_class->motion_notify_event = emacs_gtk_motion_event_handler;
  widget_class->style_set = gtk_xemacs_style_set;
}

static void
gtk_xemacs_init (GtkXEmacs *xemacs)
{
    GTK_WIDGET_SET_FLAGS (xemacs, GTK_CAN_FOCUS);
}

GtkWidget*
gtk_xemacs_new (struct frame *f)
{
  GtkXEmacs *xemacs;

  xemacs = (GtkXEmacs*) gtk_type_new (gtk_xemacs_get_type ());
  xemacs->f = f;

  return GTK_WIDGET (xemacs);
}

static void
__nuke_background_items (GtkWidget *widget)
{
  /* This bit of voodoo is here to get around the annoying flicker
     when GDK tries to futz with our background pixmap as well as
     XEmacs doing it

     We do NOT set the background of this widget window, that way
     there is NO flickering, etc.  The downside is the XEmacs frame
     appears as 'seethru' when XEmacs is too busy to redraw the
     frame.

     Well, wait, we do... otherwise there sre weird 'seethru' areas
     even when XEmacs does a full redisplay.  Most noticeable in some
     areas of the modeline, or in the right-hand-side of the window
     between the scrollbar ad n the edge of the window.
  */
  if (widget->window)
    {
      gdk_window_set_back_pixmap (widget->window, NULL, 0);
      gdk_window_set_back_pixmap (widget->parent->window, NULL, 0);
      gdk_window_set_background (widget->parent->window,
				 &widget->style->bg[GTK_STATE_NORMAL]);
      gdk_window_set_background (widget->window,
				 &widget->style->bg[GTK_STATE_NORMAL]);
    }
}

extern Lisp_Object xemacs_gtk_convert_color(GdkColor *c, GtkWidget *w);

/* From fontcolor-gtk.c */
extern Lisp_Object __get_gtk_font_truename (GdkFont *gdk_font, int expandp);

#define convert_font(f) __get_gtk_font_truename (f, 0)

#ifdef SMASH_FACE_FALLBACKS
static void
smash_face_fallbacks (struct frame *f, GtkStyle *style)
{
#define FROB(face,prop,slot) do { 							\
				Lisp_Object fallback = Qnil;				\
				Lisp_Object specifier = Fget (face, prop, Qnil);	\
   				struct Lisp_Specifier *sp = NULL;			\
 				if (NILP (specifier)) continue;				\
 				sp = XSPECIFIER (specifier);				\
 				fallback = sp->fallback;				\
 				if (EQ (Fcar (Fcar (Fcar (fallback))), Qgtk))		\
 					fallback = XCDR (fallback);			\
 				if (! NILP (slot))					\
 					fallback = acons (list1 (Qgtk),			\
 								  slot,			\
 								  fallback);		\
 				set_specifier_fallback (specifier, fallback);		\
			     } while (0);
#define FROB_FACE(face,fg_slot,bg_slot) \
do {											\
	FROB (face, Qforeground, xemacs_gtk_convert_color (&style->fg_slot[GTK_STATE_NORMAL], FRAME_GTK_SHELL_WIDGET (f)));	\
	FROB (face, Qbackground, xemacs_gtk_convert_color (&style->bg_slot[GTK_STATE_NORMAL], FRAME_GTK_SHELL_WIDGET (f)));	\
	if (style->rc_style && style->rc_style->bg_pixmap_name[GTK_STATE_NORMAL])	\
	{										\
		FROB (Vdefault_face, Qbackground_pixmap,				\
			Fmake_image_instance (build_cistring (style->rc_style->bg_pixmap_name[GTK_STATE_NORMAL]), \
					  f->device, Qnil, make_int (5)));			\
	}										\
	else										\
	{										\
		FROB (Vdefault_face, Qbackground_pixmap, Qnil);				\
	}										\
} while (0)

  FROB (Vdefault_face, Qfont, convert_font (style->font));
  FROB_FACE (Vdefault_face, fg, bg);
  FROB_FACE (Vgui_element_face, text, mid);

#undef FROB
#undef FROB_FACE
}
#endif /* SMASH_FACE_FALLBACKS */

#ifdef HAVE_SCROLLBARS
static void
smash_scrollbar_specifiers (struct frame *f, GtkStyle *style)
{
  Lisp_Object frame;
  int slider_size = 0;
  int hsize, vsize;
  GtkRangeClass *klass;

  frame = wrap_frame (f);

  klass = (GtkRangeClass *) gtk_type_class (GTK_TYPE_SCROLLBAR);
  slider_size = klass->slider_width;
  hsize = slider_size + (style->klass->ythickness * 2);
  vsize = slider_size + (style->klass->xthickness * 2);

  style = gtk_style_attach (style,
			    GTK_WIDGET (DEVICE_GTK_APP_SHELL (XDEVICE (FRAME_DEVICE (f))))->window);

  Fadd_spec_to_specifier (Vscrollbar_width, make_int (vsize), frame, Qnil, Qnil);
  Fadd_spec_to_specifier (Vscrollbar_height, make_int (hsize), frame, Qnil, Qnil);
}
#endif /* HAVE_SCROLLBARS */

#ifdef HAVE_TOOLBARS
extern Lisp_Object Vtoolbar_shadow_thickness;

static void
smash_toolbar_specifiers(struct frame *f, GtkStyle *style)
{
  Lisp_Object frame;
  GtkStyleClass *klass = (GtkStyleClass *) style->klass;

  frame = wrap_frame (f);

  Fadd_spec_to_specifier (Vtoolbar_shadow_thickness, make_int (klass->xthickness),
			  Qnil, list2 (Qgtk, Qdefault), Qprepend);
}
#endif /* HAVE_TOOLBARS */

static void
gtk_xemacs_realize (GtkWidget *widget)
{
  parent_class->realize (widget);
  gtk_xemacs_style_set (widget, gtk_widget_get_style (widget));
}

static void
gtk_xemacs_style_set (GtkWidget *widget, GtkStyle *previous_style)
{
  GtkStyle *new_style = gtk_widget_get_style (widget);
  GtkXEmacs *x = GTK_XEMACS (widget);

  parent_class->style_set (widget, previous_style);

  if (x->f)
    {
      __nuke_background_items (widget);
#ifdef SMASH_FACE_FALLBACKS
      smash_face_fallbacks (x->f, new_style);
#endif
#ifdef HAVE_SCROLLBARS
      smash_scrollbar_specifiers (x->f, new_style);
#endif
#ifdef HAVE_TOOLBARS
      smash_toolbar_specifiers (x->f, new_style);
#endif
    }
}

static void
gtk_xemacs_size_request (GtkWidget *widget, GtkRequisition *requisition)
{
    GtkXEmacs *x = GTK_XEMACS (widget);
    struct frame *f = GTK_XEMACS_FRAME (x);
    int width, height;

    if (f)
      {
	frame_unit_to_pixel_size (f, FRAME_WIDTH (f), FRAME_HEIGHT (f),
			    &width, &height);
	requisition->width = width;
	requisition->height = height;
      }
    else
      {
	parent_class->size_request (widget, requisition);
      }
}

/* Assign a size and position to the child widgets.  This differs from the
   super class method in that for all widgets except the scrollbars the size
   and position are not caclulated here.  This is because these widgets have
   this function performed for them by the redisplay code (see
   gtk_map_subwindow()). If the superclass method is called then the widgets
   can change size and position as the two pieces of code move the widgets at
   random.
*/
static void
gtk_xemacs_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
{
    GtkXEmacs *x = GTK_XEMACS (widget);
    GtkFixed *fixed = GTK_FIXED (widget);
    struct frame *f = GTK_XEMACS_FRAME (x);
    int columns, rows;
    GList *children;
    guint16 border_width;

    widget->allocation = *allocation;
    if (GTK_WIDGET_REALIZED (widget))
      gdk_window_move_resize (widget->window,
			      allocation->x, 
			      allocation->y,
			      allocation->width, 
			      allocation->height);

    border_width = GTK_CONTAINER (fixed)->border_width;
  
    children = fixed->children;
    while (children)
      {
	GtkFixedChild* child = (GtkFixedChild*) children->data;
	children = children->next;
      
	/*
	  Scrollbars are the only widget that is managed by GTK.  See
	  comments in gtk_create_scrollbar_instance().
	*/
	if (GTK_WIDGET_VISIBLE (child->widget) &&
	    gtk_type_is_a(GTK_OBJECT_TYPE(child->widget), GTK_TYPE_SCROLLBAR))
	  {
	    GtkAllocation child_allocation;
	    GtkRequisition child_requisition;

	    gtk_widget_get_child_requisition (child->widget, &child_requisition);
	    child_allocation.x = child->x + border_width;
	    child_allocation.y = child->y + border_width;
	    child_allocation.width = child_requisition.width;
	    child_allocation.height = child_requisition.height;
	    gtk_widget_size_allocate (child->widget, &child_allocation);
	  }
      }

    if (f)
      {
	f->pixwidth = allocation->width;
	f->pixheight = allocation->height;

	pixel_to_frame_unit_size (f,
			    allocation->width,
			    allocation->height, &columns, &rows);

	change_frame_size (f, columns, rows, 1);
      }
}

static void
gtk_xemacs_paint (GtkWidget *widget, GdkRectangle *area)
{
    GtkXEmacs *x = GTK_XEMACS (widget);
    struct frame *f = GTK_XEMACS_FRAME (x);

    if (GTK_WIDGET_DRAWABLE (widget))
      redisplay_redraw_exposed_area (f, area->x, area->y, area->width,
				     area->height);
}

static void
gtk_xemacs_draw (GtkWidget *widget, GdkRectangle *area)
{
    GtkFixed *fixed = GTK_FIXED (widget);
    GtkFixedChild *child;
    GdkRectangle child_area;
    GList *children;

    /* I need to manually iterate over the children instead of just
       chaining to parent_class->draw() because it calls
       gtk_fixed_paint() directly, which clears the background window,
       which causes A LOT of flashing. */

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      gtk_xemacs_paint (widget, area);

      children = fixed->children;

      while (children)
	{
	  child = (GtkFixedChild*) children->data;
	  children = children->next;
	  /* #### This is what causes the scrollbar flickering!
	     Evidently the scrollbars pretty much take care of drawing
	     themselves in most cases.  Then we come along and tell them
	     to redraw again!

	     But if we just leave it out, then they do not get drawn
	     correctly the first time!

	     Scrollbar flickering has been greatly helped by the
	     optimizations in scrollbar-gtk.c /
	     gtk_update_scrollbar_instance_status (), so this is not that
	     big a deal anymore.
	  */
	  if (gtk_widget_intersect (child->widget, area, &child_area))
	    {
	      gtk_widget_draw (child->widget, &child_area);
	    }
	}
    }
}

static gint
gtk_xemacs_expose (GtkWidget *widget, GdkEventExpose *event)
{
    GtkXEmacs *x = GTK_XEMACS (widget);
    struct frame *f = GTK_XEMACS_FRAME (x);
    GdkRectangle *a = &event->area;

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      /* This takes care of drawing the scrollbars, etc */
      parent_class->expose_event (widget, event);

      /* Now draw the actual frame data */
      if (!check_for_ignored_expose (f, a->x, a->y, a->width, a->height) &&
	  !find_matching_subwindow (f, a->x, a->y, a->width, a->height))
	redisplay_redraw_exposed_area (f, a->x, a->y, a->width, a->height);
      return (TRUE);
    }

  return FALSE;
}

Lisp_Object
xemacs_gtk_convert_color(GdkColor *c, GtkWidget *UNUSED (w))
{
  char color_buf[255];

  sprintf (color_buf, "#%04x%04x%04x", c->red, c->green, c->blue);

  return (build_cistring (color_buf));
}
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.