Mercurial > hg > xemacs-beta
annotate src/EmacsShell-sub.c @ 4594:2986723ac32d
Update comment.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Mon, 02 Feb 2009 23:31:09 +0900 |
| parents | 726060ee587c |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 428 | 1 /* Emacs shell widget -- define the two widgets. |
| 2 Copyright (C) 1994, 1995 Sun Microsystems, Inc. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
| 6 XEmacs is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License as published by the | |
| 8 Free Software Foundation; either version 2, or (at your option) any | |
| 9 later version. | |
| 10 | |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with XEmacs; see the file COPYING. If not, write to | |
| 18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 Boston, MA 02111-1307, USA. */ | |
| 20 | |
| 21 /* Synched up with: Not in FSF. */ | |
| 22 | |
| 23 /* Written by Ben Wing, May, 1994. */ | |
| 24 | |
| 25 /* | |
| 26 It is rather unfortunate that we have to do this. Blame those | |
| 27 short-sighted people who designed the monstrosities known as | |
| 28 Xt and ICCCM. | |
| 29 */ | |
| 30 | |
| 31 /* | |
| 32 This widget is not actually Emacs-specific; perhaps there could | |
| 33 be a better name than "EmacsShell". What it does is work around | |
| 34 a limitation in Xt in correctly dealing with the window-manager | |
| 35 size hints with applications that | |
| 36 | |
| 37 (a) dynamically change their window size | |
| 38 (b) have a cell size (width-inc and height-inc) other than 1 | |
| 39 | |
| 40 and | |
| 41 | |
| 42 (c) cannot predict in advance exactly what size their shell will be | |
| 43 (This is the more common situation, when you have a number | |
| 44 of widgets, each with their own size ideas) | |
| 45 | |
| 46 This widget assumes that your program contains a fixed "base size" | |
| 47 plus some number of cells (e.g. character cells). The WMShell | |
| 48 resources "widthInc" and "heightInc" specify the size of a | |
| 49 character cell, and the window manager will report the app's | |
| 50 size in cells rather than in pixels. | |
| 51 | |
| 52 If you use this widget, do not use the WMShell resources | |
| 53 "baseWidth", "baseHeight", "minWidth", or "minHeight". | |
| 54 Instead, use "widthCells" and "heightCells" to specify the | |
| 55 current size in cells (you must keep this up-to-date), | |
| 56 and "minWidthCells" and "minHeightCells" to specify the | |
| 57 minimum size in cells. | |
| 58 | |
| 59 Every time that the program issues a size command, the | |
| 60 "baseWidth", "baseHeight", "minWidth", and "minHeight" fields | |
| 61 of the WM_NORMAL_HINTS property will be updated to stay in | |
| 62 line with the resource values specified above. The calculations | |
| 63 are done once the desired shell size is known but before the | |
| 64 window-manager size-change request is issued. (We must do it | |
| 65 at this time because before then we don't know what size we | |
| 66 will request, and after the request the deed has already | |
| 67 been done.) | |
| 68 | |
| 69 After you change the "baseWidth", "baseHeight", "minWidth", | |
| 70 or "minHeight" resources, you need to call | |
| 71 EmacsShellUpdateSizeHints() to manually update the size | |
| 72 hints, except in the following two circumstances: | |
| 73 | |
| 74 (a) you are about to make a geometry request. | |
| 75 (b) you are changing only "baseWidth" and "baseHeight" | |
| 76 from within a resize procedure. (In this case, | |
| 77 the size hints are already correct.) | |
| 78 | |
| 79 */ | |
| 80 | |
| 81 #include <config.h> | |
| 82 | |
| 83 #include <stdio.h> | |
| 84 #include <stdlib.h> | |
| 85 #include <X11/StringDefs.h> | |
| 86 #include "xintrinsicp.h" | |
| 87 #include <X11/Shell.h> | |
| 88 #include <X11/ShellP.h> | |
| 89 #include <X11/Vendor.h> | |
| 90 #include <X11/VendorP.h> | |
| 91 #include "EmacsShellP.h" | |
|
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92 #include "../lwlib/xt-wrappers.h" |
| 428 | 93 |
| 2500 | 94 #define ABORT abort |
| 95 | |
| 428 | 96 #if defined (DEFINE_TOP_LEVEL_EMACS_SHELL) |
| 97 #define EMACS_SHELL_WIDGET TopLevelEmacsShellWidget | |
| 98 #define SUPERCLASS_WIDGET_CLASS topLevelShellWidgetClass | |
| 99 #define SUPERCLASS_CLASS_REC topLevelShellClassRec | |
| 100 #define EMACS_SHELL_REC TopLevelEmacsShellRec | |
| 101 #define EMACS_SHELL_CLASS_REC topLevelEmacsShellClassRec | |
| 102 #define EMACS_SHELL_CLASS_REC_TYPE TopLevelEmacsShellClassRec | |
| 103 #define EMACS_SHELL_CLASS_NAME "TopLevelEmacsShell" | |
| 104 #define EMACS_SHELL_WIDGET_CLASS topLevelEmacsShellWidgetClass | |
| 105 #define EMACS_SHELL_UPDATE_SIZE_HINTS TopLevelEmacsShellUpdateSizeHints | |
| 106 #elif defined (DEFINE_TRANSIENT_EMACS_SHELL) | |
| 107 #define EMACS_SHELL_WIDGET TransientEmacsShellWidget | |
| 108 #define SUPERCLASS_WIDGET_CLASS transientShellWidgetClass | |
| 109 #define SUPERCLASS_CLASS_REC transientShellClassRec | |
| 110 #define EMACS_SHELL_REC TransientEmacsShellRec | |
| 111 #define EMACS_SHELL_CLASS_REC transientEmacsShellClassRec | |
| 112 #define EMACS_SHELL_CLASS_REC_TYPE TransientEmacsShellClassRec | |
| 113 #define EMACS_SHELL_CLASS_NAME "TransientEmacsShell" | |
| 114 #define EMACS_SHELL_WIDGET_CLASS transientEmacsShellWidgetClass | |
| 115 #define EMACS_SHELL_UPDATE_SIZE_HINTS TransientEmacsShellUpdateSizeHints | |
| 116 #else | |
| 117 Error. Must define either DEFINE_TOP_LEVEL_EMACS_SHELL or | |
| 118 DEFINE_TRANSIENT_EMACS_SHELL. | |
| 119 #endif | |
| 120 | |
| 121 typedef struct { | |
| 122 XtPointer next_extension; | |
| 123 XrmQuark record_type; | |
| 124 long version; | |
| 125 Cardinal record_size; | |
| 126 } GenericClassExtRec; | |
| 127 | |
| 128 static XtGeometryResult RootGeometryManager (Widget gw, | |
| 129 XtWidgetGeometry *request, XtWidgetGeometry *reply); | |
| 130 static void ChangeManaged (Widget w); | |
| 131 | |
| 132 /* snarfed from Shell.c */ | |
| 133 #define BIGSIZE ((Dimension)32767) | |
| 134 | |
| 135 static XtResource resources[] = { | |
| 136 #define offset(field) XtOffset(EMACS_SHELL_WIDGET, emacs_shell.field) | |
| 137 #define coreoffset(field) XtOffset(EMACS_SHELL_WIDGET, core.field) | |
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138 #define res(name,_class,member,size) \ |
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139 { (String) name, (String) _class, XtRInt, sizeof (int), \ |
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140 offset (member), XtRImmediate, (XtPointer)0 } |
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726060ee587c
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parents:
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141 #define motifres(name,member) \ |
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142 { (String) name, XtCPosition, XtRPosition, sizeof (Position), \ |
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parents:
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143 coreoffset (member), XtRImmediate, (XtPointer)BIGSIZE } |
| 428 | 144 #ifdef LWLIB_USES_MOTIF |
| 145 /* *** BOGOSITY^10! *** The Motif VendorShell fucks around with | |
| 146 the default values for X and Y, for no obvious reason. This | |
| 147 causes Shell to indicate that the defaults of (0,0) were | |
| 148 program-specified, instead of letting the WM do what it wants. */ | |
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parents:
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149 motifres (XtNx, x), |
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150 motifres (XtNy, y), |
| 428 | 151 #endif |
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152 res (XtNwidthCells, XtCWidthCells, width_cells, 0), |
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parents:
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153 res (XtNheightCells, XtCHeightCells, height_cells, 0), |
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parents:
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diff
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154 res (XtNminWidthCells, XtCMinWidthCells, min_width_cells, 0), |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
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parents:
4522
diff
changeset
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155 res (XtNminHeightCells, XtCMinHeightCells, min_height_cells, 0), |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
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156 #undef offset |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
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parents:
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diff
changeset
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157 #undef coreoffset |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
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158 #undef res |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
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diff
changeset
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159 #undef motifres |
| 428 | 160 }; |
| 161 | |
| 162 static CompositeClassExtensionRec compositeClassExtRec = { | |
| 163 NULL, | |
| 164 NULLQUARK, | |
| 165 XtCompositeExtensionVersion, | |
| 440 | 166 sizeof (CompositeClassExtensionRec), |
| 428 | 167 TRUE, |
| 168 }; | |
| 169 | |
| 170 static ShellClassExtensionRec shellClassExtRec = { | |
| 171 NULL, | |
| 172 NULLQUARK, | |
| 173 XtShellExtensionVersion, | |
| 440 | 174 sizeof (ShellClassExtensionRec), |
| 428 | 175 RootGeometryManager |
| 176 }; | |
| 177 | |
| 178 EMACS_SHELL_CLASS_REC_TYPE EMACS_SHELL_CLASS_REC = { | |
| 179 { /* | |
| 180 * core_class fields | |
| 181 */ | |
| 182 /* superclass */ (WidgetClass) &SUPERCLASS_CLASS_REC, | |
| 183 /* class_name */ (String) EMACS_SHELL_CLASS_NAME, | |
| 440 | 184 /* size */ sizeof (EMACS_SHELL_REC), |
| 428 | 185 /* Class Initializer */ NULL, |
| 186 /* class_part_initialize*/ NULL, /* XtInheritClassPartInitialize, */ | |
| 187 /* Class init'ed ? */ FALSE, | |
| 188 /* initialize */ NULL, | |
| 189 /* initialize_notify */ NULL, | |
| 190 /* realize */ XtInheritRealize, | |
| 191 /* actions */ NULL, | |
| 192 /* num_actions */ 0, | |
| 193 /* resources */ resources, | |
| 194 /* resource_count */ XtNumber (resources), | |
| 195 /* xrm_class */ NULLQUARK, | |
| 1294 | 196 /* compress_motion */ TRUE, |
| 197 /* compress_exposure */ XtExposeCompressMaximal | XtExposeNoRegion, | |
| 198 /* compress_enterleave*/ TRUE, | |
| 428 | 199 /* visible_interest */ TRUE, |
| 200 /* destroy */ NULL, | |
| 201 /* resize */ XtInheritResize, | |
| 202 /* expose */ NULL, | |
| 203 /* set_values */ NULL, /* XtInheritSetValues, */ | |
| 204 /* set_values_hook */ NULL, | |
| 205 /* set_values_almost */ XtInheritSetValuesAlmost, | |
| 206 /* get_values_hook */ NULL, | |
| 207 /* accept_focus */ NULL, | |
| 208 /* intrinsics version */ XtVersion, | |
| 209 /* callback offsets */ NULL, | |
| 210 /* tm_table */ NULL, | |
| 211 /* query_geometry */ NULL, | |
| 212 /* display_accelerator*/ NULL, | |
| 213 /* extension */ NULL | |
| 214 },{ /* Composite */ | |
| 215 /* geometry_manager */ XtInheritGeometryManager, | |
| 216 /* change_managed */ ChangeManaged, | |
| 217 /* insert_child */ XtInheritInsertChild, | |
| 218 /* delete_child */ XtInheritDeleteChild, | |
| 219 /* extension */ (XtPointer)&compositeClassExtRec | |
| 220 },{ /* Shell */ | |
| 221 /* extension */ (XtPointer)&shellClassExtRec | |
| 222 },{ /* WMShell */ | |
| 223 /* extension */ NULL | |
| 224 },{ /* VendorShell */ | |
| 225 /* extension */ NULL | |
| 226 },{ /* TopLevelShell or TransientShell */ | |
| 227 /* both have exactly one XtPointer here. */ | |
| 228 /* extension */ NULL | |
| 229 },{ /* EmacsShell */ | |
| 230 0 | |
| 231 } | |
| 232 }; | |
| 233 | |
| 234 WidgetClass EMACS_SHELL_WIDGET_CLASS = (WidgetClass) &EMACS_SHELL_CLASS_REC; | |
| 235 | |
| 236 static void | |
| 237 update_size_hints_internal (EMACS_SHELL_WIDGET w, | |
| 238 int width, int height) | |
| 239 { | |
| 240 int base_width, base_height; | |
| 241 int cell_width, cell_height; | |
| 242 Arg al [10]; | |
| 243 | |
| 244 /* time to update them thar size hints */ | |
| 245 cell_width = w->wm.size_hints.width_inc; | |
| 246 cell_height = w->wm.size_hints.height_inc; | |
| 247 base_width = width - cell_width * w->emacs_shell.width_cells; | |
| 248 base_height = height - cell_height * w->emacs_shell.height_cells; | |
| 249 #ifdef DEBUG_GEOMETRY_MANAGEMENT | |
| 250 /* Very useful info when debugging geometry management problems. | |
| 251 When it's guaranteed that no more such problems exist, take | |
| 252 this stuff out. */ | |
| 253 printf ("update_size_hints_internal:\n"); | |
| 254 printf (" actual pixel size: %d %d\n", width, height); | |
| 255 printf (" cell size in pixels: %d %d\n", cell_width, cell_height); | |
| 256 printf (" text area size in cells: %d %d\n", w->emacs_shell.width_cells, | |
| 257 w->emacs_shell.height_cells); | |
| 258 printf (" base size set to: %d %d\n", base_width, base_height); | |
| 259 fflush (stdout); | |
| 260 #endif | |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
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261 Xt_SET_ARG(al [0], XtNbaseWidth, base_width); |
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726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
|
262 Xt_SET_ARG(al [1], XtNbaseHeight, base_height); |
|
726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
|
263 Xt_SET_ARG(al [2], XtNminWidth, base_width + |
|
726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
|
264 cell_width * w->emacs_shell.min_width_cells); |
|
726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
|
265 Xt_SET_ARG(al [3], XtNminHeight, base_height + |
|
726060ee587c
First draft of g++ 4.3 warning removal patch. Builds. *Needs ChangeLogs.*
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4522
diff
changeset
|
266 cell_height * w->emacs_shell.min_height_cells); |
| 428 | 267 XtSetValues ((Widget) w, al, 4); |
| 268 } | |
| 269 | |
| 270 static XtGeometryResult | |
| 271 SuperClassRootGeometryManager (Widget gw, | |
| 272 XtWidgetGeometry *request, | |
| 273 XtWidgetGeometry *reply) | |
| 274 { | |
| 275 ShellWidgetClass swc = (ShellWidgetClass) SUPERCLASS_WIDGET_CLASS; | |
| 276 ShellClassExtensionRec *scer; | |
| 277 GenericClassExtRec *gcer; | |
| 278 | |
| 279 /* find the shell extension record that specifies the | |
| 3381 | 280 root geometry manager method |
| 281 #### We could use XtGetClassExtension here. */ | |
| 428 | 282 for (gcer = (GenericClassExtRec *) swc->shell_class.extension; |
| 283 gcer; | |
| 284 gcer = (GenericClassExtRec *) gcer->next_extension) | |
| 285 { | |
| 286 if (gcer->record_type == NULLQUARK) | |
| 287 break; | |
| 288 } | |
| 289 | |
| 3381 | 290 /* #### The R11.6.4 Xt specification says if we don't find NULLQUARK here, |
| 291 we should assume root_geometry_manager = XtInheritRootGeometryManager. | |
| 292 Is that actually callable? */ | |
| 428 | 293 if (!gcer) |
| 2500 | 294 ABORT (); |
| 428 | 295 |
| 296 /* call it to actually make the geometry request */ | |
| 297 scer = (ShellClassExtensionRec *) gcer; | |
| 298 return (scer->root_geometry_manager)(gw, request, reply); | |
| 299 } | |
| 300 | |
| 301 static XtGeometryResult | |
| 302 RootGeometryManager (Widget gw, | |
| 303 XtWidgetGeometry *request, | |
| 304 XtWidgetGeometry *reply) | |
| 305 { | |
| 306 EMACS_SHELL_WIDGET w = (EMACS_SHELL_WIDGET) gw; | |
| 307 /* OK since this file is not dumped */ | |
| 308 static int reentrant = 0; | |
| 309 XtGeometryResult result; | |
| 310 | |
| 311 if (reentrant) | |
| 2500 | 312 ABORT (); |
| 428 | 313 reentrant++; |
| 314 | |
| 315 #ifdef DEBUG_GEOMETRY_MANAGEMENT | |
| 316 printf ("root_geometry_manager:\n"); | |
| 317 printf (" current shell size: %d %d\n", w->core.width, w->core.height); | |
| 318 if (request->request_mode & CWWidth) | |
| 319 printf ("width requested;"); | |
| 320 if (request->request_mode & CWHeight) | |
| 321 printf ("height requested;"); | |
| 322 printf ("\n"); | |
| 323 printf (" requested shell size: %d %d\n", request->width, request->height); | |
| 324 #endif | |
| 325 /* update the size hints */ | |
| 326 update_size_hints_internal (w, | |
| 327 request->request_mode & CWWidth ? | |
| 328 request->width : w->core.width, | |
| 329 request->request_mode & CWHeight ? | |
| 330 request->height : w->core.height); | |
| 331 | |
| 332 result = SuperClassRootGeometryManager (gw, request, reply); | |
| 333 | |
| 334 #ifdef DEBUG_GEOMETRY_MANAGEMENT | |
| 335 printf (" result: %s\n", | |
| 336 result == XtGeometryYes ? "XtGeometryYes" : | |
| 337 result == XtGeometryNo ? "XtGeometryNo" : | |
| 338 result == XtGeometryAlmost ? "XtGeometryAlmost" : | |
| 339 "XtGeometryDone"); | |
| 340 if (reply->request_mode & CWWidth) | |
| 3385 | 341 printf ("width returned was %d%s", |
| 342 reply->width, | |
| 343 reply->request_mode & CWHeight ? "; " : ".\n"); | |
| 428 | 344 if (reply->request_mode & CWHeight) |
| 3385 | 345 printf ("height returned was %d.\n", reply->height); |
| 346 /* #### does this also need to depend on the result? | |
| 347 With XtGeometryYes there doesn't seem to be a useful reply object. */ | |
| 348 printf (" resulting shell size: %d %d\n", | |
| 349 reply->request_mode & CWWidth ? reply->width : w->core.width, | |
| 350 reply->request_mode & CWHeight ? reply->height : w->core.height); | |
| 428 | 351 printf ("----------\n"); |
| 352 fflush (stdout); | |
| 353 #endif | |
| 354 reentrant--; | |
| 355 return result; | |
| 356 } | |
| 357 | |
| 358 static void | |
| 359 ChangeManaged (Widget wid) | |
| 360 { | |
| 361 EMACS_SHELL_WIDGET w = (EMACS_SHELL_WIDGET) wid; | |
| 362 | |
| 363 /* If not realized, then we're being called from XtRealizeWidget(). | |
| 364 RootGeometryManager() has not yet been called, and thus our | |
| 365 base size is incorrect. We need to set it now or the Shell | |
| 366 will mess up geometry specifications with negative positional | |
| 367 offsets. */ | |
| 368 if (!XtIsRealized (wid)) | |
| 369 { | |
| 370 Widget child = NULL; | |
| 371 Cardinal i; | |
| 372 | |
| 373 /* the managed child indicates what our size is */ | |
| 374 for (i = 0; i < w->composite.num_children; i++) { | |
| 375 if (XtIsManaged(w->composite.children[i])) { | |
| 376 child = w->composite.children[i]; | |
| 377 break; | |
| 378 } | |
| 379 } | |
| 380 | |
| 381 update_size_hints_internal (w, child->core.width, child->core.height); | |
| 382 } | |
| 383 | |
| 384 /* call the real ChangeManaged */ | |
| 385 (((ShellWidgetClass) SUPERCLASS_WIDGET_CLASS)-> | |
| 386 composite_class.change_managed)(wid); | |
| 387 } | |
| 388 | |
| 389 | |
| 390 /******************* external entry points *********************/ | |
| 391 | |
| 392 void | |
| 393 EMACS_SHELL_UPDATE_SIZE_HINTS (Widget gw) | |
| 394 { | |
| 395 EMACS_SHELL_WIDGET w = (EMACS_SHELL_WIDGET) gw; | |
| 396 update_size_hints_internal (w, w->core.width, w->core.height); | |
| 397 } |