code.delx.au - gnu-emacs/blob - lisp/term/x-win.el

   1 ;;; x-win.el --- parse switches controlling interface with X window system
   2 ;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   3
   4 ;; Author: FSF
   5 ;; Keywords: terminals
   6
   7 ;;; This file is part of GNU Emacs.
   8 ;;;
   9 ;;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;;; it under the terms of the GNU General Public License as published by
  11 ;;; the Free Software Foundation; either version 2, or (at your option)
  12 ;;; any later version.
  13 ;;;
  14 ;;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;;; GNU General Public License for more details.
  18 ;;;
  19 ;;; You should have received a copy of the GNU General Public License
  20 ;;; along with GNU Emacs; see the file COPYING.  If not, write to
  21 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  22
  23 ;;; Commentary:
  24
  25 ;; X-win.el:  this file is loaded from ../lisp/startup.el when it recognizes
  26 ;; that X windows are to be used.  Command line switches are parsed and those
  27 ;; pertaining to X are processed and removed from the command line.  The
  28 ;; X display is opened and hooks are set for popping up the initial window.
  29
  30 ;; startup.el will then examine startup files, and eventually call the hooks
  31 ;; which create the first window (s).
  32
  33 ;;; Code:
  34 \f
  35 ;; These are the standard X switches from the Xt Initialize.c file of
  36 ;; Release 4.
  37
  38 ;; Command line         Resource Manager string
  39
  40 ;; +rv                  *reverseVideo
  41 ;; +synchronous         *synchronous
  42 ;; -background          *background
  43 ;; -bd                  *borderColor
  44 ;; -bg                  *background
  45 ;; -bordercolor         *borderColor
  46 ;; -borderwidth         .borderWidth
  47 ;; -bw                  .borderWidth
  48 ;; -display             .display
  49 ;; -fg                  *foreground
  50 ;; -fn                  *font
  51 ;; -font                *font
  52 ;; -foreground          *foreground
  53 ;; -geometry            .geometry
  54 ;; -i                   .iconType
  55 ;; -itype               .iconType
  56 ;; -iconic              .iconic
  57 ;; -name                .name
  58 ;; -reverse             *reverseVideo
  59 ;; -rv                  *reverseVideo
  60 ;; -selectionTimeout    .selectionTimeout
  61 ;; -synchronous         *synchronous
  62 ;; -xrm
  63
  64 ;; An alist of X options and the function which handles them.  See
  65 ;; ../startup.el.
  66
  67 (if (not (eq window-system 'x))
  68     (error "%s: Loading x-win.el but not compiled for X" (invocation-name)))
  69
  70 (require 'frame)
  71 (require 'mouse)
  72 (require 'scroll-bar)
  73 (require 'faces)
  74 (require 'select)
  75 (require 'menu-bar)
  76
  77 (defvar x-invocation-args)
  78
  79 (defvar x-command-line-resources nil)
  80
  81 (defconst x-option-alist
  82   '(("-bw" .    x-handle-numeric-switch)
  83     ("-d" .             x-handle-display)
  84     ("-display" .       x-handle-display)
  85     ("-name" .  x-handle-name-rn-switch)
  86     ("-rn" .    x-handle-name-rn-switch)
  87     ("-T" .             x-handle-switch)
  88     ("-r" .             x-handle-switch)
  89     ("-rv" .    x-handle-switch)
  90     ("-reverse" .       x-handle-switch)
  91     ("-fn" .    x-handle-switch)
  92     ("-font" .  x-handle-switch)
  93     ("-ib" .    x-handle-numeric-switch)
  94     ("-g" .             x-handle-geometry)
  95     ("-geometry" .      x-handle-geometry)
  96     ("-fg" .    x-handle-switch)
  97     ("-foreground".     x-handle-switch)
  98     ("-bg" .    x-handle-switch)
  99     ("-background".     x-handle-switch)
 100     ("-ms" .    x-handle-switch)
 101     ("-itype" . x-handle-switch)
 102     ("-i"       .       x-handle-switch)
 103     ("-iconic" .        x-handle-iconic)
 104     ("-xrm" .       x-handle-xrm-switch)
 105     ("-cr" .    x-handle-switch)
 106     ("-vb" .    x-handle-switch)
 107     ("-hb" .    x-handle-switch)
 108     ("-bd" .    x-handle-switch)))
 109
 110 (defconst x-long-option-alist
 111   '(("--border-width" . "-bw")
 112     ("--display" .      "-d")
 113     ("--name" .         "-name")
 114     ("--title" .        "-T")
 115     ("--reverse-video" . "-reverse")
 116     ("--font" .         "-font")
 117     ("--internal-border" . "-ib")
 118     ("--geometry" .     "-geometry")
 119     ("--foreground-color" . "-fg")
 120     ("--background-color" . "-bg")
 121     ("--mouse-color" .  "-ms")
 122     ("--icon-type" .    "-itype")
 123     ("--iconic" .       "-iconic")
 124     ("--xrm" .          "-xrm")
 125     ("--cursor-color" . "-cr")
 126     ("--vertical-scroll-bars" . "-vb")
 127     ("--border-color" . "-bd")))
 128
 129 (defconst x-switch-definitions
 130   '(("-name" name)
 131     ("-T" name)
 132     ("-r" reverse t)
 133     ("-rv" reverse t)
 134     ("-reverse" reverse t)
 135     ("-fn" font)
 136     ("-font" font)
 137     ("-ib" internal-border-width)
 138     ("-fg" foreground-color)
 139     ("-foreground" foreground-color)
 140     ("-bg" background-color)
 141     ("-background" background-color)
 142     ("-ms" mouse-color)
 143     ("-cr" cursor-color)
 144     ("-itype" icon-type t)
 145     ("-i" icon-type t)
 146     ("-vb" vertical-scroll-bars t)
 147     ("-hb" horizontal-scroll-bars t)
 148     ("-bd" border-color)
 149     ("-bw" border-width)))
 150
 151 ;; Handler for switches of the form "-switch value" or "-switch".
 152 (defun x-handle-switch (switch)
 153   (let ((aelt (assoc switch x-switch-definitions)))
 154     (if aelt
 155         (if (nth 2 aelt)
 156             (setq default-frame-alist
 157                   (cons (cons (nth 1 aelt) (nth 2 aelt))
 158                         default-frame-alist))
 159           (setq default-frame-alist
 160                 (cons (cons (nth 1 aelt)
 161                             (car x-invocation-args))
 162                       default-frame-alist)
 163                 x-invocation-args (cdr x-invocation-args))))))
 164
 165 ;; Make -iconic apply only to the initial frame!
 166 (defun x-handle-iconic (switch)
 167   (setq initial-frame-alist
 168         (cons '(visibility . icon) initial-frame-alist)))
 169
 170 ;; Handler for switches of the form "-switch n"
 171 (defun x-handle-numeric-switch (switch)
 172   (let ((aelt (assoc switch x-switch-definitions)))
 173     (if aelt
 174         (setq default-frame-alist
 175               (cons (cons (nth 1 aelt)
 176                           (string-to-int (car x-invocation-args)))
 177                     default-frame-alist)
 178               x-invocation-args
 179               (cdr x-invocation-args)))))
 180
 181 ;; Handle the -xrm option.
 182 (defun x-handle-xrm-switch (switch)
 183   (or (consp x-invocation-args)
 184       (error "%s: missing argument to `%s' option" (invocation-name) switch))
 185   (setq x-command-line-resources (car x-invocation-args))
 186   (setq x-invocation-args (cdr x-invocation-args)))
 187
 188 ;; Handle the geometry option
 189 (defun x-handle-geometry (switch)
 190   (let ((geo (x-parse-geometry (car x-invocation-args))))
 191     (setq initial-frame-alist
 192           (append initial-frame-alist
 193                   (if (or (assq 'left geo) (assq 'top geo))
 194                       '((user-position . t)))
 195                   (if (or (assq 'height geo) (assq 'width geo))
 196                       '((user-size . t)))
 197                   geo)
 198           x-invocation-args (cdr x-invocation-args))))
 199
 200 ;; Handle the -name and -rn options.  Set the variable x-resource-name
 201 ;; to the option's operand; if the switch was `-name', set the name of
 202 ;; the initial frame, too.
 203 (defun x-handle-name-rn-switch (switch)
 204   (or (consp x-invocation-args)
 205       (error "%s: missing argument to `%s' option" (invocation-name) switch))
 206   (setq x-resource-name (car x-invocation-args)
 207         x-invocation-args (cdr x-invocation-args))
 208   (if (string= switch "-name")
 209       (setq initial-frame-alist (cons (cons 'name x-resource-name)
 210                                       initial-frame-alist))))
 211
 212 (defvar x-display-name nil
 213   "The X display name specifying server and X frame.")
 214
 215 (defun x-handle-display (switch)
 216   (setq x-display-name (car x-invocation-args)
 217         x-invocation-args (cdr x-invocation-args)))
 218
 219 (defvar x-invocation-args nil)
 220
 221 (defun x-handle-args (args)
 222   "Process the X-related command line options in ARGS.
 223 This is done before the user's startup file is loaded.  They are copied to
 224 x-invocation args from which the X-related things are extracted, first
 225 the switch (e.g., \"-fg\") in the following code, and possible values
 226 \(e.g., \"black\") in the option handler code (e.g., x-handle-switch).
 227 This returns ARGS with the arguments that have been processed removed."
 228   (message "%s" args)
 229   (setq x-invocation-args args
 230         args nil)
 231   (while x-invocation-args
 232     (let* ((this-switch (car x-invocation-args))
 233            (orig-this-switch this-switch)
 234            completion argval aelt)
 235       (setq x-invocation-args (cdr x-invocation-args))
 236       ;; Check for long options with attached arguments
 237       ;; and separate out the attached option argument into argval.
 238       (if (string-match "^--[^=]*=" this-switch)
 239           (setq argval (substring this-switch (match-end 0))
 240                 this-switch (substring this-switch 0 (1- (match-end 0)))))
 241       (setq completion (try-completion this-switch x-long-option-alist))
 242       (if (eq completion t)
 243           ;; Exact match for long option.
 244           (setq this-switch (cdr (assoc this-switch x-long-option-alist)))
 245         (if (stringp completion)
 246             (let ((elt (assoc completion x-long-option-alist)))
 247               ;; Check for abbreviated long option.
 248               (or elt
 249                   (error "Option `%s' is ambiguous" this-switch))
 250               (setq this-switch (cdr elt)))
 251           ;; Check for a short option.
 252           (setq argval nil this-switch orig-this-switch)))
 253       (setq aelt (assoc this-switch x-option-alist))
 254       (if aelt
 255           (if argval
 256               (let ((x-invocation-args
 257                      (cons argval x-invocation-args)))
 258                 (funcall (cdr aelt) this-switch))
 259             (funcall (cdr aelt) this-switch))
 260         (setq args (cons this-switch args)))))
 261   (setq args (nreverse args)))
 262
 263
 264 \f
 265 ;;
 266 ;; Standard X cursor shapes, courtesy of Mr. Fox, who wanted ALL of them.
 267 ;;
 268
 269 (defconst x-pointer-X-cursor 0)
 270 (defconst x-pointer-arrow 2)
 271 (defconst x-pointer-based-arrow-down 4)
 272 (defconst x-pointer-based-arrow-up 6)
 273 (defconst x-pointer-boat 8)
 274 (defconst x-pointer-bogosity 10)
 275 (defconst x-pointer-bottom-left-corner 12)
 276 (defconst x-pointer-bottom-right-corner 14)
 277 (defconst x-pointer-bottom-side 16)
 278 (defconst x-pointer-bottom-tee 18)
 279 (defconst x-pointer-box-spiral 20)
 280 (defconst x-pointer-center-ptr 22)
 281 (defconst x-pointer-circle 24)
 282 (defconst x-pointer-clock 26)
 283 (defconst x-pointer-coffee-mug 28)
 284 (defconst x-pointer-cross 30)
 285 (defconst x-pointer-cross-reverse 32)
 286 (defconst x-pointer-crosshair 34)
 287 (defconst x-pointer-diamond-cross 36)
 288 (defconst x-pointer-dot 38)
 289 (defconst x-pointer-dotbox 40)
 290 (defconst x-pointer-double-arrow 42)
 291 (defconst x-pointer-draft-large 44)
 292 (defconst x-pointer-draft-small 46)
 293 (defconst x-pointer-draped-box 48)
 294 (defconst x-pointer-exchange 50)
 295 (defconst x-pointer-fleur 52)
 296 (defconst x-pointer-gobbler 54)
 297 (defconst x-pointer-gumby 56)
 298 (defconst x-pointer-hand1 58)
 299 (defconst x-pointer-hand2 60)
 300 (defconst x-pointer-heart 62)
 301 (defconst x-pointer-icon 64)
 302 (defconst x-pointer-iron-cross 66)
 303 (defconst x-pointer-left-ptr 68)
 304 (defconst x-pointer-left-side 70)
 305 (defconst x-pointer-left-tee 72)
 306 (defconst x-pointer-leftbutton 74)
 307 (defconst x-pointer-ll-angle 76)
 308 (defconst x-pointer-lr-angle 78)
 309 (defconst x-pointer-man 80)
 310 (defconst x-pointer-middlebutton 82)
 311 (defconst x-pointer-mouse 84)
 312 (defconst x-pointer-pencil 86)
 313 (defconst x-pointer-pirate 88)
 314 (defconst x-pointer-plus 90)
 315 (defconst x-pointer-question-arrow 92)
 316 (defconst x-pointer-right-ptr 94)
 317 (defconst x-pointer-right-side 96)
 318 (defconst x-pointer-right-tee 98)
 319 (defconst x-pointer-rightbutton 100)
 320 (defconst x-pointer-rtl-logo 102)
 321 (defconst x-pointer-sailboat 104)
 322 (defconst x-pointer-sb-down-arrow 106)
 323 (defconst x-pointer-sb-h-double-arrow 108)
 324 (defconst x-pointer-sb-left-arrow 110)
 325 (defconst x-pointer-sb-right-arrow 112)
 326 (defconst x-pointer-sb-up-arrow 114)
 327 (defconst x-pointer-sb-v-double-arrow 116)
 328 (defconst x-pointer-shuttle 118)
 329 (defconst x-pointer-sizing 120)
 330 (defconst x-pointer-spider 122)
 331 (defconst x-pointer-spraycan 124)
 332 (defconst x-pointer-star 126)
 333 (defconst x-pointer-target 128)
 334 (defconst x-pointer-tcross 130)
 335 (defconst x-pointer-top-left-arrow 132)
 336 (defconst x-pointer-top-left-corner 134)
 337 (defconst x-pointer-top-right-corner 136)
 338 (defconst x-pointer-top-side 138)
 339 (defconst x-pointer-top-tee 140)
 340 (defconst x-pointer-trek 142)
 341 (defconst x-pointer-ul-angle 144)
 342 (defconst x-pointer-umbrella 146)
 343 (defconst x-pointer-ur-angle 148)
 344 (defconst x-pointer-watch 150)
 345 (defconst x-pointer-xterm 152)
 346 \f
 347 ;;
 348 ;; Available colors
 349 ;;
 350
 351 (defvar x-colors '("aquamarine"
 352                    "Aquamarine"
 353                    "medium aquamarine"
 354                    "MediumAquamarine"
 355                    "black"
 356                    "Black"
 357                    "blue"
 358                    "Blue"
 359                    "cadet blue"
 360                    "CadetBlue"
 361                    "cornflower blue"
 362                    "CornflowerBlue"
 363                    "dark slate blue"
 364                    "DarkSlateBlue"
 365                    "light blue"
 366                    "LightBlue"
 367                    "light steel blue"
 368                    "LightSteelBlue"
 369                    "medium blue"
 370                    "MediumBlue"
 371                    "medium slate blue"
 372                    "MediumSlateBlue"
 373                    "midnight blue"
 374                    "MidnightBlue"
 375                    "navy blue"
 376                    "NavyBlue"
 377                    "navy"
 378                    "Navy"
 379                    "sky blue"
 380                    "SkyBlue"
 381                    "slate blue"
 382                    "SlateBlue"
 383                    "steel blue"
 384                    "SteelBlue"
 385                    "coral"
 386                    "Coral"
 387                    "cyan"
 388                    "Cyan"
 389                    "firebrick"
 390                    "Firebrick"
 391                    "brown"
 392                    "Brown"
 393                    "gold"
 394                    "Gold"
 395                    "goldenrod"
 396                    "Goldenrod"
 397                    "green"
 398                    "Green"
 399                    "dark green"
 400                    "DarkGreen"
 401                    "dark olive green"
 402                    "DarkOliveGreen"
 403                    "forest green"
 404                    "ForestGreen"
 405                    "lime green"
 406                    "LimeGreen"
 407                    "medium forest green"
 408                    "MediumForestGreen"
 409                    "medium sea green"
 410                    "MediumSeaGreen"
 411                    "medium spring green"
 412                    "MediumSpringGreen"
 413                    "pale green"
 414                    "PaleGreen"
 415                    "sea green"
 416                    "SeaGreen"
 417                    "spring green"
 418                    "SpringGreen"
 419                    "yellow green"
 420                    "YellowGreen"
 421                    "dark slate grey"
 422                    "DarkSlateGrey"
 423                    "dark slate gray"
 424                    "DarkSlateGray"
 425                    "dim grey"
 426                    "DimGrey"
 427                    "dim gray"
 428                    "DimGray"
 429                    "light grey"
 430                    "LightGrey"
 431                    "light gray"
 432                    "LightGray"
 433                    "gray"
 434                    "grey"
 435                    "Gray"
 436                    "Grey"
 437                    "khaki"
 438                    "Khaki"
 439                    "magenta"
 440                    "Magenta"
 441                    "maroon"
 442                    "Maroon"
 443                    "orange"
 444                    "Orange"
 445                    "orchid"
 446                    "Orchid"
 447                    "dark orchid"
 448                    "DarkOrchid"
 449                    "medium orchid"
 450                    "MediumOrchid"
 451                    "pink"
 452                    "Pink"
 453                    "plum"
 454                    "Plum"
 455                    "red"
 456                    "Red"
 457                    "indian red"
 458                    "IndianRed"
 459                    "medium violet red"
 460                    "MediumVioletRed"
 461                    "orange red"
 462                    "OrangeRed"
 463                    "violet red"
 464                    "VioletRed"
 465                    "salmon"
 466                    "Salmon"
 467                    "sienna"
 468                    "Sienna"
 469                    "tan"
 470                    "Tan"
 471                    "thistle"
 472                    "Thistle"
 473                    "turquoise"
 474                    "Turquoise"
 475                    "dark turquoise"
 476                    "DarkTurquoise"
 477                    "medium turquoise"
 478                    "MediumTurquoise"
 479                    "violet"
 480                    "Violet"
 481                    "blue violet"
 482                    "BlueViolet"
 483                    "wheat"
 484                    "Wheat"
 485                    "white"
 486                    "White"
 487                    "yellow"
 488                    "Yellow"
 489                    "green yellow"
 490                    "GreenYellow")
 491   "The full list of X colors from the `rgb.text' file.")
 492
 493 (defun x-defined-colors (&optional frame)
 494   "Return a list of colors supported for a particular frame.
 495 The argument FRAME specifies which frame to try.
 496 The value may be different for frames on different X displays."
 497   (or frame (setq frame (selected-frame)))
 498   (let ((all-colors x-colors)
 499         (this-color nil)
 500         (defined-colors nil))
 501     (while all-colors
 502       (setq this-color (car all-colors)
 503             all-colors (cdr all-colors))
 504       (and (face-color-supported-p frame this-color t)
 505            (setq defined-colors (cons this-color defined-colors))))
 506     defined-colors))
 507 \f
 508 ;;;; Function keys
 509
 510 (defun iconify-or-deiconify-frame ()
 511   "Iconify the selected frame, or deiconify if it's currently an icon."
 512   (interactive)
 513   (if (eq (cdr (assq 'visibility (frame-parameters))) t)
 514       (iconify-frame)
 515     (make-frame-visible)))
 516
 517 (substitute-key-definition 'suspend-emacs 'iconify-or-deiconify-frame
 518                            global-map)
 519
 520 ;; Map certain keypad keys into ASCII characters
 521 ;; that people usually expect.
 522 (define-key function-key-map [backspace] [127])
 523 (define-key function-key-map [delete] [127])
 524 (define-key function-key-map [tab] [?\t])
 525 (define-key function-key-map [linefeed] [?\n])
 526 (define-key function-key-map [clear] [11])
 527 (define-key function-key-map [return] [13])
 528 (define-key function-key-map [escape] [?\e])
 529 (define-key function-key-map [M-backspace] [?\M-\d])
 530 (define-key function-key-map [M-delete] [?\M-\d])
 531 (define-key function-key-map [M-tab] [?\M-\t])
 532 (define-key function-key-map [M-linefeed] [?\M-\n])
 533 (define-key function-key-map [M-clear] [?\M-\013])
 534 (define-key function-key-map [M-return] [?\M-\015])
 535 (define-key function-key-map [M-escape] [?\M-\e])
 536
 537 ;; These tell read-char how to convert
 538 ;; these special chars to ASCII.
 539 (put 'backspace 'ascii-character 127)
 540 (put 'delete 'ascii-character 127)
 541 (put 'tab 'ascii-character ?\t)
 542 (put 'linefeed 'ascii-character ?\n)
 543 (put 'clear 'ascii-character 12)
 544 (put 'return 'ascii-character 13)
 545 (put 'escape 'ascii-character ?\e)
 546
 547 ;; Set up to recognize vendor-specific keysyms.
 548 ;; Unless/until there is a real conflict,
 549 ;; we need not try to make this list depend on
 550 ;; the type of X server in use.
 551 (setq system-key-alist
 552       '(
 553         ;; These are some HP keys.
 554         (  168 . mute-acute)
 555         (  169 . mute-grave)
 556         (  170 . mute-asciicircum)
 557         (  171 . mute-diaeresis)
 558         (  172 . mute-asciitilde)
 559         (  175 . lira)
 560         (  190 . guilder)
 561         (  252 . block)
 562         (  256 . longminus)
 563         (65388 . reset)
 564         (65389 . system)
 565         (65390 . user)
 566         (65391 . clearline)
 567         (65392 . insertline)
 568         (65393 . deleteline)
 569         (65394 . insertchar)
 570         (65395 . deletechar)
 571         (65396 . backtab)
 572         (65397 . kp-backtab)
 573         ;; This is used by DEC's X server.
 574         (65280 . remove)
 575         ;; These are for Sun.
 576         (392963 . mute-acute)
 577         (392960 . mute-grave)
 578         (392964 . mute-diaeresis)
 579         (392961 . mute-asciicircum)
 580         (392976 . f36)
 581         (392977 . f37)
 582         (393056 . req)
 583         ;; These are for Sun under X11R6
 584         (393072 . props)
 585         (393073 . front)
 586         (393074 . copy)
 587         (393075 . open)
 588         (393076 . paste)
 589         (393077 . cut)
 590         ))
 591 \f
 592 ;;;; Selections and cut buffers
 593
 594 ;;; We keep track of the last text selected here, so we can check the
 595 ;;; current selection against it, and avoid passing back our own text
 596 ;;; from x-cut-buffer-or-selection-value.
 597 (defvar x-last-selected-text nil)
 598
 599 ;;; It is said that overlarge strings are slow to put into the cut buffer.
 600 ;;; Note this value is overridden below.
 601 (defvar x-cut-buffer-max 20000
 602   "Max number of characters to put in the cut buffer.")
 603
 604 (defvar x-select-enable-clipboard nil
 605   "Non-nil means cutting and pasting uses the clipboard.
 606 This is in addition to the primary selection.")
 607
 608 ;;; Make TEXT, a string, the primary X selection.
 609 ;;; Also, set the value of X cut buffer 0, for backward compatibility
 610 ;;; with older X applications.
 611 ;;; gildea@lcs.mit.edu says it's not desirable to put kills
 612 ;;; in the clipboard.
 613 (defun x-select-text (text &optional push)
 614   ;; Don't send the cut buffer too much text.
 615   ;; It becomes slow, and if really big it causes errors.
 616   (if (< (length text) x-cut-buffer-max)
 617       (x-set-cut-buffer text push)
 618     (x-set-cut-buffer "" push))
 619   (x-set-selection 'PRIMARY text)
 620   (if x-select-enable-clipboard
 621       (x-set-selection 'CLIPBOARD text))
 622   (setq x-last-selected-text text))
 623
 624 ;;; Return the value of the current X selection.
 625 ;;; Consult the selection, then the cut buffer.  Treat empty strings
 626 ;;; as if they were unset.
 627 (defun x-cut-buffer-or-selection-value ()
 628   (let (text)
 629
 630     ;; Don't die if x-get-selection signals an error.
 631     (condition-case c
 632         (setq text (x-get-selection 'PRIMARY))
 633       (error (message "%s" c)))
 634     (if (string= text "") (setq text nil))
 635
 636     (if x-select-enable-clipboard
 637         (condition-case c
 638             (setq text (x-get-selection 'CLIPBOARD))
 639           (error (message "%s" c))))
 640     (if (string= text "") (setq text nil))
 641     (or text (setq text (x-get-cut-buffer 0)))
 642     (if (string= text "") (setq text nil))
 643
 644     (cond
 645      ((not text) nil)
 646      ((eq text x-last-selected-text) nil)
 647      ((string= text x-last-selected-text)
 648       ;; Record the newer string, so subsequent calls can use the `eq' test.
 649       (setq x-last-selected-text text)
 650       nil)
 651      (t
 652       (setq x-last-selected-text text)))))
 653
 654 \f
 655 ;;; Do the actual X Windows setup here; the above code just defines
 656 ;;; functions and variables that we use now.
 657
 658 (setq command-line-args (x-handle-args command-line-args))
 659
 660 ;;; Make sure we have a valid resource name.
 661 (or (stringp x-resource-name)
 662     (let (i)
 663       (setq x-resource-name (invocation-name))
 664
 665       ;; Change any . or * characters in x-resource-name to hyphens,
 666       ;; so as not to choke when we use it in X resource queries.
 667       (while (setq i (string-match "[.*]" x-resource-name))
 668         (aset x-resource-name i ?-))))
 669
 670 ;; For the benefit of older Emacses (19.27 and earlier) that are sharing
 671 ;; the same lisp directory, don't pass the third argument unless we seem
 672 ;; to have the multi-display support.
 673 (if (fboundp 'x-close-connection)
 674     (x-open-connection (or x-display-name
 675                            (setq x-display-name (getenv "DISPLAY")))
 676                        x-command-line-resources
 677                        ;; Exit Emacs with fatal error if this fails.
 678                        t)
 679   (x-open-connection (or x-display-name
 680                          (setq x-display-name (getenv "DISPLAY")))
 681                      x-command-line-resources))
 682
 683 (setq frame-creation-function 'x-create-frame-with-faces)
 684
 685 (setq x-cut-buffer-max (min (- (/ (x-server-max-request-size) 2) 100)
 686                             x-cut-buffer-max))
 687
 688 ;; Sun expects the menu bar cut and paste commands to use the clipboard.
 689 ;; This has ,? to match both on Sunos and on Solaris.
 690 (if (string-match " Sun Microsystems,? Inc\\."
 691                   (x-server-vendor))
 692     (menu-bar-enable-clipboard))
 693
 694 ;; Apply a geometry resource to the initial frame.  Put it at the end
 695 ;; of the alist, so that anything specified on the command line takes
 696 ;; precedence.
 697 (let* ((res-geometry (x-get-resource "geometry" "Geometry"))
 698        parsed)
 699   (if res-geometry
 700       (progn
 701         (setq parsed (x-parse-geometry res-geometry))
 702         ;; All geometry parms apply to the initial frame.
 703         (setq initial-frame-alist (append initial-frame-alist parsed))
 704         ;; The size parms apply to all frames.
 705         (if (assq 'height parsed)
 706             (setq default-frame-alist
 707                   (cons (cons 'height (cdr (assq 'height parsed)))
 708                         default-frame-alist)))
 709         (if (assq 'width parsed)
 710             (setq default-frame-alist
 711                   (cons (cons 'width (cdr (assq 'width parsed)))
 712                         default-frame-alist))))))
 713
 714 ;; Check the reverseVideo resource.
 715 (let ((case-fold-search t))
 716   (let ((rv (x-get-resource "reverseVideo" "ReverseVideo")))
 717     (if (and rv
 718              (string-match "^\\(true\\|yes\\|on\\)$" rv))
 719         (setq default-frame-alist
 720               (cons '(reverse . t) default-frame-alist)))))
 721
 722 ;; Set x-selection-timeout, measured in milliseconds.
 723 (let ((res-selection-timeout
 724        (x-get-resource "selectionTimeout" "SelectionTimeout")))
 725   (setq x-selection-timeout 20000)
 726   (if res-selection-timeout
 727       (setq x-selection-timeout (string-to-number res-selection-timeout))))
 728
 729 (defun x-win-suspend-error ()
 730   (error "Suspending an emacs running under X makes no sense"))
 731 (add-hook 'suspend-hook 'x-win-suspend-error)
 732
 733 ;;; Arrange for the kill and yank functions to set and check the clipboard.
 734 (setq interprogram-cut-function 'x-select-text)
 735 (setq interprogram-paste-function 'x-cut-buffer-or-selection-value)
 736
 737 ;;; Turn off window-splitting optimization; X is usually fast enough
 738 ;;; that this is only annoying.
 739 (setq split-window-keep-point t)
 740
 741 ;; Don't show the frame name; that's redundant with X.
 742 (setq-default mode-line-buffer-identification '("Emacs: %12b"))
 743
 744 ;;; x-win.el ends here