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3f930d20 | 1 | /* Definitions and headers for communication with X protocol. |
4e027793 | 2 | Copyright (C) 1989, 1993 Free Software Foundation, Inc. |
3f930d20 JB |
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 | |
4e027793 | 8 | the Free Software Foundation; either version 2, or (at your option) |
3f930d20 JB |
9 | 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; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #ifdef HAVE_X11 | |
21 | #include <X11/Xlib.h> | |
22 | #include <X11/cursorfont.h> | |
23 | #include <X11/Xutil.h> | |
24 | #include <X11/keysym.h> | |
25 | #include <X11/Xatom.h> | |
26 | #include <X11/Xresource.h> | |
27 | #else | |
28 | #include <X/Xlib.h> | |
29 | #endif /* HAVE_X11 */ | |
30 | ||
31 | /* Define a queue for X-events. One such queue is used for mouse clicks. | |
32 | Another is used for expose events. */ | |
33 | ||
34 | #define EVENT_BUFFER_SIZE 64 | |
35 | ||
3f930d20 JB |
36 | /* Max and Min sizes in character columns. */ |
37 | #define MINWIDTH 10 | |
38 | #define MINHEIGHT 10 | |
39 | #define MAXWIDTH 300 | |
40 | #define MAXHEIGHT 80 | |
41 | ||
42 | #ifdef HAVE_X11 | |
ef15f270 | 43 | |
d2729198 JB |
44 | /* HAVE_X11R4 is defined if we have the features of X11R4. It should |
45 | be defined when we're using X11R5, since X11R5 has the features of | |
46 | X11R4. If, in the future, we find we need more of these flags | |
47 | (HAVE_X11R5, for example), code should always be written to test | |
48 | the most recent flag first: | |
49 | ||
50 | #ifdef HAVE_X11R5 | |
51 | ... | |
52 | #elif HAVE_X11R4 | |
53 | ... | |
54 | #elif HAVE_X11 | |
55 | ... | |
56 | #endif | |
57 | ||
58 | If you ever find yourself writing a "#ifdef HAVE_FOO" clause that | |
59 | looks a lot like another one, consider moving the text into a macro | |
60 | whose definition is configuration-dependent, but whose usage is | |
61 | universal - like the stuff in systime.h. | |
62 | ||
63 | It turns out that we can auto-detect whether we're being compiled | |
ef15f270 JB |
64 | with X11R3 or X11R4 by looking for the flag macros for R4 structure |
65 | members that R3 doesn't have. */ | |
66 | #ifdef PBaseSize | |
67 | #define HAVE_X11R4 | |
68 | #endif | |
69 | ||
3f930d20 JB |
70 | #define PIX_TYPE unsigned long |
71 | #define XDISPLAY x_current_display, | |
72 | #define XFlushQueue() XFlush(x_current_display) | |
73 | #define BLACK_PIX_DEFAULT BlackPixel (x_current_display, \ | |
74 | XDefaultScreen (x_current_display)) | |
75 | #define WHITE_PIX_DEFAULT WhitePixel (x_current_display, \ | |
76 | XDefaultScreen (x_current_display)) | |
77 | #define DISPLAY_SCREEN_ARG x_current_display, \ | |
78 | XDefaultScreen (x_current_display) | |
79 | #define DISPLAY_CELLS DisplayCells (x_current_display, XDefaultScreen (x_current_display)) | |
bbe42033 | 80 | #define ROOT_WINDOW RootWindow (x_current_display, DefaultScreen (x_current_display)) |
3f930d20 JB |
81 | #define FONT_TYPE XFontStruct |
82 | #define Color XColor | |
83 | ||
84 | #define XExposeRegionEvent XExposeEvent | |
85 | #define Bitmap Pixmap /* In X11, Bitmaps are are kind of | |
86 | Pixmap. */ | |
87 | #define WINDOWINFO_TYPE XWindowAttributes | |
88 | #define XGetWindowInfo(w, i) XGetWindowAttributes (x_current_display, \ | |
89 | (w), (i)) | |
90 | #define XGetFont(f) XLoadQueryFont (x_current_display, (f)) | |
91 | #define XLoseFont(f) XFreeFont (x_current_display, (f)) | |
92 | #define XStuffPending() XPending (x_current_display) | |
93 | #define XClear(w) XClearWindow (x_current_display, (w)) | |
94 | #define XWarpMousePointer(w,x,y) XWarpPointer (x_current_display, None, w, \ | |
95 | 0,0,0,0, x, y) | |
96 | #define XHandleError XSetErrorHandler | |
97 | #define XHandleIOError XSetIOErrorHandler | |
98 | ||
99 | #define XChangeWindowSize(w,x,y) XResizeWindow(x_current_display,w,x,y) | |
100 | ||
101 | #define FONT_WIDTH(f) ((f)->max_bounds.width) | |
102 | #define FONT_HEIGHT(f) ((f)->ascent + (f)->descent) | |
103 | #define FONT_BASE(f) ((f)->ascent) | |
104 | ||
3f930d20 | 105 | /* The mask of events that text windows always want to receive. This |
8828b393 JB |
106 | does not include mouse movement events. It is used when the window |
107 | is created (in x_window) and when we ask/unask for mouse movement | |
108 | events (in XTmouse_tracking_enable). | |
109 | ||
110 | We do include ButtonReleases in this set because elisp isn't always | |
111 | fast enough to catch them when it wants them, and they're rare | |
112 | enough that they don't use much processor time. */ | |
3f930d20 JB |
113 | |
114 | #define STANDARD_EVENT_SET \ | |
115 | (KeyPressMask \ | |
116 | | ExposureMask \ | |
117 | | ButtonPressMask \ | |
8828b393 JB |
118 | | ButtonReleaseMask \ |
119 | | PointerMotionMask \ | |
120 | | PointerMotionHintMask \ | |
3f930d20 JB |
121 | | StructureNotifyMask \ |
122 | | FocusChangeMask \ | |
123 | | LeaveWindowMask \ | |
124 | | EnterWindowMask \ | |
125 | | VisibilityChangeMask) | |
126 | ||
127 | #else /* X10 */ | |
128 | ||
129 | #define ConnectionNumber(dpy) dpyno() | |
130 | #define PIX_TYPE int | |
131 | #define XDISPLAY | |
132 | #define XFlushQueue() XFlush() | |
133 | #define BLACK_PIX_DEFAULT BlackPixel | |
134 | #define WHITE_PIX_DEFAULT WhitePixel | |
135 | #define DISPLAY_SCREEN_ARG | |
136 | #define DISPLAY_CELLS DisplayCells () | |
137 | #define ROOT_WINDOW RootWindow | |
138 | #define XFree free | |
139 | #define FONT_TYPE FontInfo | |
140 | ||
141 | #define WINDOWINFO_TYPE WindowInfo | |
142 | #define XGetWindowInfo(w, i) XQueryWindow ((w), (i)) | |
143 | #define XGetFont(f) XOpenFont ((f)) | |
144 | #define XLoseFont(f) XCloseFont ((f)) | |
145 | #define XStuffPending() XPending () | |
146 | #define XWarpMousePointer(w,x,y) XWarpMouse (w,x,y) | |
147 | #define XHandleError XErrorHandler | |
148 | #define XHandleIOError XIOErrorHandler | |
149 | ||
150 | #define FONT_WIDTH(f) ((f)->width) | |
151 | #define FONT_HEIGHT(f) ((f)->height) | |
152 | #define FONT_BASE(f) ((f)->base) | |
153 | ||
154 | #define XChangeWindowSize(w,x,y) XChangeWindow(w,x,y) | |
155 | ||
156 | #endif /* X10 */ | |
157 | ||
158 | struct event_queue | |
159 | { | |
160 | int rindex; /* Index at which to fetch next. */ | |
161 | int windex; /* Index at which to store next. */ | |
162 | XEvent xrep[EVENT_BUFFER_SIZE]; | |
163 | }; | |
164 | ||
165 | /* Queue for mouse clicks. */ | |
166 | extern struct event_queue x_mouse_queue; | |
167 | ||
168 | /* Mechanism for interlocking between main program level | |
169 | and input interrupt level. */ | |
170 | ||
171 | /* Nonzero during a critical section. At such a time, an input interrupt | |
172 | does nothing but set `x_pending_input'. */ | |
173 | extern int x_input_blocked; | |
174 | ||
175 | /* Nonzero means an input interrupt has arrived | |
176 | during the current critical section. */ | |
177 | extern int x_pending_input; | |
178 | ||
3f930d20 JB |
179 | /* Begin critical section. */ |
180 | #define BLOCK_INPUT (x_input_blocked++) | |
181 | ||
182 | /* End critical section. */ | |
265a9e55 JB |
183 | #define UNBLOCK_INPUT \ |
184 | (x_input_blocked--, (x_input_blocked < 0 ? (abort (), 0) : 0)) | |
3f930d20 JB |
185 | |
186 | #define TOTALLY_UNBLOCK_INPUT (x_input_blocked = 0) | |
187 | #define UNBLOCK_INPUT_RESIGNAL UNBLOCK_INPUT | |
188 | ||
189 | /* This is the X connection that we are using. */ | |
190 | ||
191 | extern Display *x_current_display; | |
192 | ||
f676886a | 193 | extern struct frame *x_window_to_frame (); |
3f930d20 | 194 | |
f676886a JB |
195 | /* The frame (if any) which has the X window that has keyboard focus. |
196 | Zero if none. This is examined by Ffocus_frame in xfns.c */ | |
3f930d20 | 197 | |
f676886a | 198 | struct frame *x_focus_frame; |
3f930d20 JB |
199 | |
200 | #ifdef HAVE_X11 | |
201 | /* Variables associated with the X display screen this emacs is using. */ | |
202 | ||
203 | /* How many screens this X display has. */ | |
259c5af9 | 204 | extern int x_screen_count; |
3f930d20 JB |
205 | |
206 | /* The vendor supporting this X server. */ | |
207 | extern Lisp_Object Vx_vendor; | |
208 | ||
209 | /* The vendor's release number for this X server. */ | |
259c5af9 | 210 | extern int x_release; |
3f930d20 JB |
211 | |
212 | /* Height of this X screen in pixels. */ | |
259c5af9 | 213 | extern int x_screen_height; |
3f930d20 JB |
214 | |
215 | /* Height of this X screen in millimeters. */ | |
259c5af9 | 216 | extern int x_screen_height_mm; |
3f930d20 JB |
217 | |
218 | /* Width of this X screen in pixels. */ | |
259c5af9 | 219 | extern int x_screen_width; |
3f930d20 JB |
220 | |
221 | /* Width of this X screen in millimeters. */ | |
259c5af9 | 222 | extern int x_screen_width_mm; |
3f930d20 JB |
223 | |
224 | /* Does this X screen do backing store? */ | |
225 | extern Lisp_Object Vx_backing_store; | |
226 | ||
227 | /* Does this X screen do save-unders? */ | |
259c5af9 | 228 | extern int x_save_under; |
3f930d20 JB |
229 | |
230 | /* Number of planes for this screen. */ | |
259c5af9 | 231 | extern int x_screen_planes; |
3f930d20 JB |
232 | |
233 | /* X Visual type of this screen. */ | |
234 | extern Lisp_Object Vx_screen_visual; | |
235 | ||
236 | #endif /* HAVE_X11 */ | |
237 | \f | |
238 | enum text_cursor_kinds { | |
239 | filled_box_cursor, hollow_box_cursor, bar_cursor | |
240 | }; | |
241 | ||
c8e3cbe0 JB |
242 | #define PIXEL_WIDTH(f) ((f)->display.x->pixel_width) |
243 | #define PIXEL_HEIGHT(f) ((f)->display.x->pixel_height) | |
3f930d20 | 244 | |
f676886a | 245 | /* Each X frame object points to its own struct x_display object |
3f930d20 JB |
246 | in the display.x field. The x_display structure contains all |
247 | the information that is specific to X windows. */ | |
248 | ||
249 | struct x_display | |
250 | { | |
251 | /* Position of the X window (x and y offsets in root window). */ | |
252 | int left_pos; | |
253 | int top_pos; | |
254 | ||
255 | /* Border width of the X window as known by the X window system. */ | |
256 | int border_width; | |
257 | ||
258 | /* Size of the X window in pixels. */ | |
259 | int pixel_height, pixel_width; | |
260 | ||
261 | #ifdef HAVE_X11 | |
f676886a | 262 | /* The tiled border used when the mouse is out of the frame. */ |
3f930d20 JB |
263 | Pixmap border_tile; |
264 | ||
265 | /* Here are the Graphics Contexts for the default font. */ | |
266 | GC normal_gc; /* Normal video */ | |
267 | GC reverse_gc; /* Reverse video */ | |
268 | GC cursor_gc; /* cursor drawing */ | |
269 | #endif /* HAVE_X11 */ | |
270 | ||
271 | /* Width of the internal border. This is a line of background color | |
f676886a | 272 | just inside the window's border. When the frame is selected, |
3f930d20 JB |
273 | a highlighting is displayed inside the internal border. */ |
274 | int internal_border_width; | |
275 | ||
f676886a JB |
276 | /* The X window used for this frame. |
277 | May be zero while the frame object is being created | |
3f930d20 JB |
278 | and the X window has not yet been created. */ |
279 | Window window_desc; | |
280 | ||
281 | /* The X window used for the bitmap icon; | |
282 | or 0 if we don't have a bitmap icon. */ | |
283 | Window icon_desc; | |
284 | ||
285 | /* The X window that is the parent of this X window. | |
286 | Usually but not always RootWindow. */ | |
287 | Window parent_desc; | |
288 | ||
289 | /* 1 for bitmap icon, 0 for text icon. */ | |
290 | int icon_bitmap_flag; | |
291 | ||
292 | FONT_TYPE *font; | |
293 | ||
294 | /* Pixel values used for various purposes. | |
295 | border_pixel may be -1 meaning use a gray tile. */ | |
296 | PIX_TYPE background_pixel; | |
297 | PIX_TYPE foreground_pixel; | |
298 | PIX_TYPE cursor_pixel; | |
299 | PIX_TYPE border_pixel; | |
300 | PIX_TYPE mouse_pixel; | |
301 | ||
3f930d20 JB |
302 | /* Descriptor for the cursor in use for this window. */ |
303 | #ifdef HAVE_X11 | |
304 | Cursor text_cursor; | |
305 | Cursor nontext_cursor; | |
306 | Cursor modeline_cursor; | |
307 | #else | |
308 | Cursor cursor; | |
309 | #endif | |
310 | ||
311 | /* The name that was associated with the icon, the last time | |
312 | it was refreshed. Usually the same as the name of the | |
f676886a | 313 | buffer in the currently selected window in the frame */ |
3f930d20 JB |
314 | char *icon_label; |
315 | ||
316 | /* Flag to set when the X window needs to be completely repainted. */ | |
317 | int needs_exposure; | |
318 | ||
319 | /* What kind of text cursor is drawn in this window right now? (If | |
320 | there is no cursor (phys_cursor_x < 0), then this means nothing. */ | |
321 | enum text_cursor_kinds text_cursor_kind; | |
ef15f270 JB |
322 | |
323 | /* These are the current window manager hints. It seems that | |
324 | XSetWMHints, when presented with an unset bit in the `flags' | |
325 | member of the hints structure, does not leave the corresponding | |
326 | attribute unchanged; rather, it resets that attribute to its | |
327 | default value. For example, unless you set the `icon_pixmap' | |
328 | field and the `IconPixmapHint' bit, XSetWMHints will forget what | |
329 | your icon pixmap was. This is rather troublesome, since some of | |
330 | the members (for example, `input' and `icon_pixmap') want to stay | |
331 | the same throughout the execution of Emacs. So, we keep this | |
332 | structure around, just leaving values in it and adding new bits | |
333 | to the mask as we go. */ | |
334 | XWMHints wm_hints; | |
c8e3cbe0 | 335 | |
c8e3cbe0 JB |
336 | /* The size of the extra width currently allotted for vertical |
337 | scrollbars, in pixels. */ | |
338 | int vertical_scrollbar_extra; | |
3f930d20 | 339 | }; |
d2729198 JB |
340 | |
341 | /* Return the window associated with the frame F. */ | |
342 | #define FRAME_X_WINDOW(f) ((f)->display.x->window_desc) | |
343 | ||
3f930d20 JB |
344 | \f |
345 | /* When X windows are used, a glyf may be a 16 bit unsigned datum. | |
346 | The high order byte is the face number and is used as an index | |
347 | in the face table. A face is a font plus: | |
348 | 1) the unhighlighted foreground color, | |
349 | 2) the unhighlighted background color. | |
350 | For highlighting, the two colors are exchanged. | |
351 | Face number 0 is unused. The low order byte of a glyf gives | |
352 | the character within the font. All fonts are assumed to be | |
353 | fixed width, and to have the same height and width. */ | |
354 | ||
355 | #ifdef HAVE_X11 | |
3f930d20 | 356 | |
9d46c2e6 | 357 | /* Face declared in dispextern.h */ |
3f930d20 JB |
358 | |
359 | #else /* X10 */ | |
360 | ||
361 | struct face | |
362 | { | |
363 | FONT_TYPE *font; /* Font info for specified font. */ | |
364 | int fg; /* Unhighlighted foreground. */ | |
365 | int bg; /* Unhighlighted background. */ | |
366 | }; | |
367 | #endif /* X10 */ | |
368 | ||
369 | #define MAX_FACES_AND_GLYPHS 256 | |
370 | extern struct face *x_face_table[]; | |
c8e3cbe0 JB |
371 | |
372 | \f | |
373 | /* X-specific scrollbar stuff. */ | |
374 | ||
4e027793 JB |
375 | /* We represent scrollbars as lisp vectors. This allows us to place |
376 | references to them in windows without worrying about whether we'll | |
377 | end up with windows referring to dead scrollbars; the garbage | |
378 | collector will free it when its time comes. | |
379 | ||
380 | We use struct scrollbar as a template for accessing fields of the | |
381 | vector. */ | |
382 | ||
c8e3cbe0 JB |
383 | struct scrollbar { |
384 | ||
4e027793 JB |
385 | /* These fields are shared by all vectors. */ |
386 | int size_from_Lisp_Vector_struct; | |
387 | struct Lisp_Vector *next_from_Lisp_Vector_struct; | |
388 | ||
389 | /* The window we're a scrollbar for. */ | |
390 | Lisp_Object window; | |
c8e3cbe0 | 391 | |
4e027793 JB |
392 | /* The next and previous in the chain of scrollbars in this frame. */ |
393 | Lisp_Object next, prev; | |
c8e3cbe0 | 394 | |
4e027793 JB |
395 | /* The X window representing this scrollbar. Since this is a full |
396 | 32-bit quantity, we store it split into two 32-bit values. */ | |
397 | Lisp_Object x_window_low, x_window_high; | |
c8e3cbe0 JB |
398 | |
399 | /* The position and size of the scrollbar in pixels, relative to the | |
400 | frame. */ | |
4e027793 | 401 | Lisp_Object top, left, width, height; |
c8e3cbe0 | 402 | |
4e027793 JB |
403 | /* The starting and ending positions of the handle, relative to the |
404 | handle area (i.e. zero is the top position, not | |
405 | SCROLLBAR_TOP_BORDER). If they're equal, that means the handle | |
406 | hasn't been drawn yet. | |
c8e3cbe0 | 407 | |
4e027793 JB |
408 | These are not actually the locations where the beginning and end |
409 | are drawn; in order to keep handles from becoming invisible when | |
410 | editing large files, we establish a minimum height by always | |
411 | drawing handle bottoms VERTICAL_SCROLLBAR_MIN_HANDLE pixels below | |
412 | where they would be normally; the bottom and top are in a | |
413 | different co-ordinate system. */ | |
414 | Lisp_Object start, end; | |
c8e3cbe0 JB |
415 | |
416 | /* If the scrollbar handle is currently being dragged by the user, | |
417 | this is the number of pixels from the top of the handle to the | |
418 | place where the user grabbed it. If the handle isn't currently | |
4e027793 JB |
419 | being dragged, this is Qnil. */ |
420 | Lisp_Object dragging; | |
c8e3cbe0 JB |
421 | }; |
422 | ||
4e027793 JB |
423 | /* The number of elements a vector holding a struct scrollbar needs. */ |
424 | #define SCROLLBAR_VEC_SIZE \ | |
425 | ((sizeof (struct scrollbar) - sizeof (int) - sizeof (struct Lisp_Vector *)) \ | |
426 | / sizeof (Lisp_Object)) | |
427 | ||
428 | /* Turning a lisp vector value into a pointer to a struct scrollbar. */ | |
429 | #define XSCROLLBAR(vec) ((struct scrollbar *) XPNTR (vec)) | |
430 | ||
431 | ||
432 | /* Building a 32-bit C integer from two 16-bit lisp integers. */ | |
433 | #define SCROLLBAR_PACK(low, high) (XINT (high) << 16 | XINT (low)) | |
434 | ||
435 | /* Setting two lisp integers to the low and high words of a 32-bit C int. */ | |
436 | #define SCROLLBAR_UNPACK(low, high, int32) \ | |
437 | (XSET ((low), Lisp_Int, (int32) & 0xffff), \ | |
438 | XSET ((high), Lisp_Int, ((int32) >> 16) & 0xffff)) | |
439 | ||
440 | ||
441 | /* Extract the X window id of the scrollbar from a struct scrollbar. */ | |
442 | #define SCROLLBAR_X_WINDOW(ptr) \ | |
443 | ((Window) SCROLLBAR_PACK ((ptr)->x_window_low, (ptr)->x_window_high)) | |
444 | ||
445 | /* Store a window id in a struct scrollbar. */ | |
446 | #define SET_SCROLLBAR_X_WINDOW(ptr, id) \ | |
447 | (SCROLLBAR_UNPACK ((ptr)->x_window_low, (ptr)->x_window_high, (int) id)) | |
448 | ||
449 | ||
c8e3cbe0 JB |
450 | /* Return the outside pixel width for a vertical scrollbar on frame F. */ |
451 | #define VERTICAL_SCROLLBAR_PIXEL_WIDTH(f) (2*FONT_WIDTH ((f)->display.x->font)) | |
452 | ||
453 | /* Return the outside pixel height for a vertical scrollbar HEIGHT | |
454 | rows high on frame F. */ | |
455 | #define VERTICAL_SCROLLBAR_PIXEL_HEIGHT(f, height) \ | |
456 | ((height) * FONT_HEIGHT ((f)->display.x->font)) | |
457 | ||
4e027793 JB |
458 | /* Return the inside width of a vertical scrollbar, given the outside |
459 | width. */ | |
460 | #define VERTICAL_SCROLLBAR_INSIDE_WIDTH(width) \ | |
461 | ((width) - VERTICAL_SCROLLBAR_LEFT_BORDER - VERTICAL_SCROLLBAR_RIGHT_BORDER) | |
c8e3cbe0 | 462 | |
4e027793 JB |
463 | /* Return the length of the rectangle within which the top of the |
464 | handle must stay. This isn't equivalent to the inside height, | |
465 | because the scrollbar handle has a minimum height. | |
466 | ||
467 | This is the real range of motion for the scrollbar, so when we're | |
468 | scaling buffer positions to scrollbar positions, we use this, not | |
469 | VERTICAL_SCROLLBAR_INSIDE_HEIGHT. */ | |
470 | #define VERTICAL_SCROLLBAR_TOP_RANGE(height) \ | |
471 | (VERTICAL_SCROLLBAR_INSIDE_HEIGHT (height) - VERTICAL_SCROLLBAR_MIN_HANDLE) | |
472 | ||
473 | /* Return the inside height of vertical scrollbar, given the outside | |
474 | height. See VERTICAL_SCROLLBAR_TOP_RANGE too. */ | |
475 | #define VERTICAL_SCROLLBAR_INSIDE_HEIGHT(height) \ | |
476 | ((height) - VERTICAL_SCROLLBAR_TOP_BORDER - VERTICAL_SCROLLBAR_BOTTOM_BORDER) | |
477 | ||
478 | ||
479 | /* Border widths for scrollbars. | |
480 | ||
481 | Scrollbar windows don't have any X borders; their border width is | |
482 | set to zero, and we redraw borders ourselves. This makes the code | |
483 | a bit cleaner, since we don't have to convert between outside width | |
484 | (used when relating to the rest of the screen) and inside width | |
485 | (used when sizing and drawing the scrollbar window itself). | |
486 | ||
487 | The handle moves up and down/back and forth in a rectange inset | |
488 | from the edges of the scrollbar. These are widths by which we | |
489 | inset the handle boundaries from the scrollbar edges. */ | |
490 | #define VERTICAL_SCROLLBAR_LEFT_BORDER (2) | |
491 | #define VERTICAL_SCROLLBAR_RIGHT_BORDER (3) | |
492 | #define VERTICAL_SCROLLBAR_TOP_BORDER (2) | |
493 | #define VERTICAL_SCROLLBAR_BOTTOM_BORDER (2) | |
494 | ||
495 | /* Minimum lengths for scrollbar handles, in pixels. */ | |
496 | #define VERTICAL_SCROLLBAR_MIN_HANDLE (5) | |
c8e3cbe0 JB |
497 | |
498 | \f | |
499 | /* Manipulating pixel sizes and character sizes. | |
500 | Knowledge of which factors affect the overall size of the window should | |
501 | be hidden in these macros, if that's possible. | |
502 | ||
4e027793 JB |
503 | /* Return the upper/left pixel position of the character cell on frame F |
504 | at ROW/COL. */ | |
505 | #define CHAR_TO_PIXEL_ROW(f, row) \ | |
506 | ((f)->display.x->internal_border_width \ | |
507 | + (row) * FONT_HEIGHT ((f)->display.x->font)) | |
508 | #define CHAR_TO_PIXEL_COL(f, col) \ | |
509 | ((f)->display.x->internal_border_width \ | |
510 | + (col) * FONT_WIDTH ((f)->display.x->font)) | |
511 | ||
512 | /* Return the pixel width/height of frame F if it has | |
513 | WIDTH columns/HEIGHT rows. */ | |
c8e3cbe0 | 514 | #define CHAR_TO_PIXEL_WIDTH(f, width) \ |
4e027793 JB |
515 | (CHAR_TO_PIXEL_COL (f, width) \ |
516 | + (f)->display.x->vertical_scrollbar_extra \ | |
517 | + (f)->display.x->internal_border_width) | |
c8e3cbe0 | 518 | #define CHAR_TO_PIXEL_HEIGHT(f, height) \ |
4e027793 JB |
519 | (CHAR_TO_PIXEL_ROW (f, height) \ |
520 | + (f)->display.x->internal_border_width) | |
c8e3cbe0 | 521 | |
c8e3cbe0 | 522 | |
4e027793 JB |
523 | /* Return the row/column (zero-based) of the character cell containing |
524 | the pixel on FRAME at ROW/COL. */ | |
525 | #define PIXEL_TO_CHAR_ROW(frame, row) \ | |
526 | (((row) - (f)->display.x->internal_border_width) \ | |
c8e3cbe0 | 527 | / FONT_HEIGHT ((f)->display.x->font)) |
4e027793 JB |
528 | #define PIXEL_TO_CHAR_COL(frame, col) \ |
529 | (((col) - (f)->display.x->internal_border_width) \ | |
530 | / FONT_WIDTH ((f)->display.x->font)) | |
c8e3cbe0 | 531 | |
4e027793 JB |
532 | /* How many columns/rows of text can we fit in WIDTH/HEIGHT pixels on |
533 | frame F? */ | |
534 | #define PIXEL_TO_CHAR_WIDTH(f, width) \ | |
535 | (PIXEL_TO_CHAR_COL (f, ((width) \ | |
536 | - (f)->display.x->internal_border_width \ | |
537 | - (f)->display.x->vertical_scrollbar_extra))) | |
538 | #define PIXEL_TO_CHAR_HEIGHT(f, height) \ | |
539 | (PIXEL_TO_CHAR_ROW (f, ((height) \ | |
540 | - (f)->display.x->internal_border_width))) |