| blob | 9b6b169e56850ef81de6e03202fdb8c8645ab006 |
1 ;;; mouse.el --- window system-independent mouse support -*- lexical-binding: t -*-
3 ;; Copyright (C) 1993-1995, 1999-2017 Free Software Foundation, Inc.
5 ;; Maintainer: emacs-devel@gnu.org
6 ;; Keywords: hardware, mouse
7 ;; Package: emacs
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
24 ;;; Commentary:
26 ;; This package provides various useful commands (including help
27 ;; system access) through the mouse. All this code assumes that mouse
28 ;; interpretation has been abstracted into Emacs input events.
30 ;;; Code:
32 ;;; Utility functions.
34 ;; Indent track-mouse like progn.
43 "If non-nil, mouse yank commands yank at point instead of at click."
48 "If non-nil, copy to kill-ring upon mouse adjustments of the region.
51 addition to mouse drags."
57 "Non-nil means that clicking Mouse-1 on a link follows the link.
59 With the default setting, an ordinary Mouse-1 click on a link
60 performs the same action as Mouse-2 on that link, while a longer
61 Mouse-1 click \(hold down the Mouse-1 button for more than 450
62 milliseconds) performs the original Mouse-1 binding \(which
63 typically sets point where you click the mouse).
65 If value is an integer, the time elapsed between pressing and
66 releasing the mouse button determines whether to follow the link
67 or perform the normal Mouse-1 action (typically set point).
68 The absolute numeric value specifies the maximum duration of a
70 short click follows the link, and a longer click performs the
71 normal action. A negative value gives the opposite behavior.
73 If value is `double', a double click follows the link.
75 Otherwise, a single Mouse-1 click unconditionally follows the link.
77 Note that dragging the mouse never follows the link.
79 This feature only works in modes that specifically identify
80 clickable text as links, so it may not work with some external
81 packages. See `mouse-on-link-p' for details."
90 "If non-nil, a Mouse-1 click also follows links in non-selected windows.
92 If nil, a Mouse-1 click on a link in a non-selected window performs
93 the normal mouse-1 binding, typically selects the window and sets
94 point at the click position."
100 "Turn `mouse-1' events into `mouse-2' events if follows-link.
101 Expects to be bound to `down-mouse-1' in `key-translation-map'."
118 nil
119 ;; Use read-key so it works for xterm-mouse-mode!
125 ;; Turn the mouse-1 into a mouse-2 to follow links,
126 ;; but only if ‘mouse-on-link-p’ hasn’t returned a
127 ;; string or vector (see its docstring).
132 ;; If mouse-2 has never been done by the user, it
133 ;; doesn't have the necessary property to be
134 ;; interpreted correctly.
138 ;; Don't change the down event, only the up-event
139 ;; (bug#18212).
140 nil)
142 nil))))))))
149 \f
150 ;; Provide a mode-specific menu on a mouse button.
153 "Show menu for minor mode specified by INDICATOR.
154 Interactively, INDICATOR is read using completion.
155 If there is no menu defined for the minor mode, then create one with
156 items `Turn Off' and `Help'."
159 "Minor mode indicator: "
171 ,indicator
181 "Show minor-mode menu for EVENT on minor modes area of the mode line."
192 ;; Make a keymap in which our last command leads to a menu or
193 ;; default to the edit menu.
197 menu-bar-edit-menu)))
200 newmap))
203 "Return menu keybar MENUBAR, or a lone submenu inside it.
204 If MENUBAR defines exactly one submenu, return just that submenu.
205 Otherwise, return MENUBAR."
212 menubar
216 "Return a keymap equivalent to the menu bar.
217 The contents are the items that would be in the menu bar whether or
218 not it is actually displayed."
223 ;; If a keymap doesn't have a prompt string (a lazy
224 ;; programmer didn't bother to provide one), create it and
225 ;; insert it into the keymap; each keymap gets its own
226 ;; prompt. This is required for non-toolkit versions to
227 ;; display non-empty menu pane names.
240 minor-mode)))
243 menu))
257 ;; Supplying the list is faster than making a new map.
258 ;; FIXME: We have a problem here: we have to use the global/local/minor
259 ;; so they're displayed in the expected order, but later on in the command
260 ;; loop, they're actually looked up in the opposite order.
262 global-menu
263 local-menu
264 minor-mode-menus)))
267 "Pop up a mode-specific menu of mouse commands.
268 Default to the Edit menu if the major mode doesn't define a menu."
275 "Pop up a menu equivalent to the menu bar for keyboard EVENT with PREFIX.
276 The contents are the items that would be in the menu bar whether or
277 not it is actually displayed."
284 "Popup a menu like either `mouse-major-mode-menu' or `mouse-popup-menubar'.
285 Use the former if the menu bar is showing, otherwise the latter."
293 event prefix))
294 \f
295 ;; Commands that operate on windows.
302 ;; Give temporary modes such as isearch a chance to turn off.
306 "Delete the window you click on.
307 Do nothing if the frame has just one window.
308 This command must be bound to a mouse click."
315 "Select the window clicked on; don't move point."
328 "Delete the selected window, and create a new frame displaying its buffer."
339 "Delete all windows except the one you click on."
344 "Select Emacs window mouse is on, then split it vertically in half.
345 The window is split at the line clicked on.
346 This command must be bound to a mouse click."
356 ;; Bind `window-combination-resize' to nil so we are sure to get
357 ;; the split right at the line clicked on.
363 "Select Emacs window mouse is on, then split it horizontally in half.
364 The window is split at the column clicked on.
365 This command must be bound to a mouse click."
375 ;; Bind `window-combination-resize' to nil so we are sure to get
376 ;; the split right at the column clicked on.
382 "Drag a mode line, header line, or vertical line with the mouse.
383 START-EVENT is the starting mouse-event of the drag action. LINE
384 must be one of the symbols `header', `mode', or `vertical'."
385 ;; Give temporary modes such as isearch a chance to turn off.
391 ;; `position' records the x- or y-coordinate of the last
392 ;; sampled position.
398 ;; `last-position' records the x- or y-coordinate of the
399 ;; previously sampled position. The difference of `position'
400 ;; and `last-position' determines the size change of WINDOW.
403 posn-window growth dragged)
404 ;; Decide on whether we are allowed to track at all and whose
405 ;; window's edge we drag.
409 ;; We can't drag the header line of a topmost window.
411 ;; Drag bottom edge of window above the header line.
415 ;; Allow resizing the minibuffer window if it's on the
416 ;; same frame as and immediately below `window', and it's
417 ;; either active or `resize-mini-windows' is nil.
436 nil)
438 ;; Drag right edge of `window'.
441 ;; Set `posn-window' to the window where `event' was recorded.
442 ;; This can be `window' or the window on the left or right of
443 ;; `window'.
445 ;; Add left edge of `posn-window' to `position'.
448 ;; Add width of objects on the left of the text area to
449 ;; `position'.
452 position)))
455 position))))
456 ;; When the cursor overshoots after shrinking a window to its
457 ;; minimum size and the dragging direction changes, have the
458 ;; cursor first catch up with the window edge.
470 ;; Drag bottom edge of `window'.
472 ;; Set `posn-window' to the window where `event' was recorded.
473 ;; This can be either `window' or the window above or below of
474 ;; `window'.
478 ;; Add top edge of `posn-window' to `position'.
480 ;; If necessary, add height of header line to `position'
484 ;; When the cursor overshoots after shrinking a window to its
485 ;; minimum size and the dragging direction changes, have the
486 ;; cursor first catch up with the window edge.
498 ;; Start tracking. The special value 'dragging' signals the
499 ;; display engine to freeze the mouse pointer shape for as long
500 ;; as we drag.
502 ;; Loop reading events and sampling the position of the mouse.
510 ;; Swallow drag-mouse-1 events to avoid selecting some other window.
513 ;; For vertical line dragging swallow also a mouse-1
514 ;; event (but only if we dragged at least once to allow mouse-1
515 ;; clicks to get through).
520 ;; Some of the events will of course end up looked up
521 ;; with a mode-line, header-line or vertical-line prefix ...
525 ;; ... and some maybe even with a right- or bottom-divider
526 ;; prefix.
529 map)
533 "Change the height of a window by dragging on the mode line."
538 "Change the height of a window by dragging on the header line."
543 "Change the width of a window by dragging on the vertical line."
546 \f
548 "Effect of selecting a region extending backward from double click.
549 Nil means keep point at the position clicked (region end);
550 non-nil means move point to beginning of region."
557 "Move point to the position clicked on with the mouse.
558 This should be bound to a mouse click event type.
559 If PROMOTE-TO-REGION is non-nil and event is a multiple-click, select
560 the corresponding element around point, with the resulting position of
561 point determined by `mouse-select-region-move-to-beginning'."
570 ;; Use event-end in case called from mouse-drag-region.
571 ;; If EVENT is a click, event-end and event-start give same value.
579 "Return non-nil if there's an active region that was set with the mouse."
588 "Set the region to the text dragged over, and copy to kill ring.
589 This should be bound to a mouse drag event.
590 See the `mouse-drag-copy-region' variable to control whether this
591 command alters the kill ring or not."
599 ;; If the mouse ends up in any other window or on the menu
600 ;; bar, use `window-point' of selected window (Bug#23707).
605 ;; Drag events don't come with a click count, sadly, so we hack
606 ;; our way around this problem by remembering the start-event in
607 ;; `mouse-drag-start' and fetching the click-count from there.
611 ;; Occasionally we get spurious drag events where the user hasn't
612 ;; dragged his mouse, but instead Emacs has dragged the text under the
613 ;; user's mouse. Try to recover those cases (bug#17562).
625 ;; Don't set this-command to `kill-region', so a following
626 ;; C-w won't double the text in the kill ring. Ignore
627 ;; `last-command' so we don't append to a preceding kill.
631 ;; On a text terminal, bounce the cursor.
641 ;; Set transient-mark-mode for a little while.
646 transient-mark-mode))))
652 "The pause between scroll steps caused by mouse drags, in seconds.
653 If you drag the mouse beyond the edge of a window, Emacs scrolls the
654 window to bring the text beyond that edge into view, with a delay of
655 this many seconds between scroll steps. Scrolling stops when you move
656 the mouse back into the window, or release the button.
657 This variable's value may be non-integral.
658 Setting this to zero causes Emacs to scroll as fast as it can."
663 "The minimum number of lines scrolled by dragging mouse out of window.
664 Moving the mouse out the top or bottom edge of the window begins
665 scrolling repeatedly. The number of lines scrolled per repetition
666 is normally equal to the number of lines beyond the window edge that
667 the mouse has moved. However, it always scrolls at least the number
668 of lines specified by this variable."
673 "Scroll the window WINDOW, JUMP lines at a time, until new input arrives.
674 If OVERLAY is an overlay, let it stretch from START to the far edge of
675 the newly visible text.
676 Upon exit, point is at the far edge of the newly visible text."
692 ;; window-end doesn't reflect the window's new
693 ;; start position until the next redisplay.
699 ;; Now that we have scrolled WINDOW properly,
700 ;; put point back where it was for the redisplay
701 ;; so that we don't mess up the selected window.
713 "Set the region to the text that the mouse is dragged over.
714 Highlight the drag area as you move the mouse.
715 This must be bound to a button-down mouse event.
716 In Transient Mark mode, the highlighting remains as long as the mark
717 remains active. Otherwise, it remains until the next input event.
719 When the region already exists and `mouse-drag-and-drop-region'
720 is non-nil, this moves the entire region of text to where mouse
721 is dragged over to."
727 ;; Give temporary modes such as isearch a chance to turn off.
732 "Look for a property at click position.
733 POS may be either a buffer position or a click position like
734 those returned from `event-start'. If the click position is on
735 a string, the text property PROPERTY is examined.
736 If this is nil or the click is not on a string, then
737 the corresponding buffer position is searched for PROPERTY.
738 If PROPERTY is encountered in one of those places,
739 its value is returned."
745 ;; Mouse clicks in the fringe come with a position in
746 ;; (nth 5). This is useful but is not exactly where we clicked, so
747 ;; don't look up that position's properties!
749 left-margin right-margin)))
754 "Return non-nil if POS is on a link in the current buffer.
755 POS must specify a buffer position in the current buffer, as a list
756 of the form returned by the `event-start' and `event-end' functions,
757 or a mouse event location in the selected window (see `event-start').
758 However, if `mouse-1-click-in-non-selected-windows' is non-nil,
759 POS may be a mouse event location in any window.
761 A clickable link is identified by one of the following methods:
763 - If the character at POS has a non-nil `follow-link' text or
764 overlay property, the value of that property determines what to do.
766 - If there is a local key-binding or a keybinding at position POS
767 for the `follow-link' event, the binding of that event determines
768 what to do.
770 The resulting value determine whether POS is inside a link:
772 - If the value is `mouse-face', POS is inside a link if there
773 is a non-nil `mouse-face' property at POS. Return t in this case.
775 - If the value is a function, FUNC, POS is inside a link if
776 the call \(FUNC POS) returns non-nil. Return the return value
777 from that call. Arg is \(posn-point POS) if POS is a mouse event.
779 - Otherwise, return the value itself.
781 The return value is interpreted as follows:
783 - If it is a string, the mouse-1 event is translated into the
784 first character of the string, i.e. the action of the mouse-1
785 click is the local or global binding of that character.
787 - If it is a vector, the mouse-1 event is translated into the
788 first element of that vector, i.e. the action of the mouse-1
789 click is the local or global binding of that event.
791 - Otherwise, the mouse-1 event is translated into a mouse-2 event
792 at the same position."
795 mouse-1-click-in-non-selected-windows
806 ;; FIXME: This seems questionable if the click is not in a buffer.
807 ;; Should we instead decide that `action' takes a `posn'?
815 "Fix help message MSG for `mouse-1-click-follows-link'."
835 msg)
838 "Track mouse drags by highlighting area between point and cursor.
839 The region will be defined with mark and point."
849 ;; We've recorded what we needed from the current buffer and
850 ;; window, now let's jump to the place of the event, where things
851 ;; are happening.
859 ;; Don't count the mode line.
862 ;; Suppress automatic hscrolling, because that is a nuisance
863 ;; when setting point near the right fringe (but see below).
868 ;; In case the down click is in the middle of some intangible text,
869 ;; use the end of that text, and put it in START-POINT.
874 ;; Activate the region, using `mouse-start-end' to determine where
875 ;; to put point and mark (e.g., double-click will select a word).
897 ;; As soon as the user moves, we can re-enable auto-hscroll.
899 ;; And remember that we have moved, so mouse-set-region can know
900 ;; its event is really a drag event.
905 end-point click-count)
911 nil start-point))
914 nil start-point))))))))
915 map)
937 ;; Commands to handle xterm-style multiple clicks.
939 "Skip over word, over whitespace, or over identical punctuation.
940 If DIR is positive skip forward; if negative, skip backward."
944 ;; Here, we can't use skip-syntax-forward/backward because
945 ;; they don't pay attention to word-separating-categories,
946 ;; and thus they will skip over a true word boundary. So,
947 ;; we simulate the original behavior by using forward-word.
969 "Return a list of region bounds based on START and END according to MODE.
970 If MODE is 0 then set point to (min START END), mark to (max START END).
971 If MODE is 1 then set point to start of word at (min START END),
972 mark to end of word at (max START END).
973 If MODE is 2 then do the same for lines."
977 end temp)))
986 ;; This happens in CC Mode when unbalanced parens in CPP
987 ;; constructs are given punctuation syntax with
988 ;; syntax-table text properties. (2016-02-21).
990 start start))
1001 ;; See above comment about CC Mode.
1050 \f
1051 ;; Subroutine: set the mark where CLICK happened,
1052 ;; but don't do anything else.
1069 ;; Use reverse, not nreverse, since event-modifiers
1070 ;; does not copy the list it returns.
1073 event)))
1077 t
1079 nil)))
1081 ;; Momentarily show where the mark is, if highlighting doesn't show it.
1084 "Set mark at the position clicked on with the mouse.
1085 Display cursor at that position for a second.
1086 This must be bound to a mouse click."
1090 ;; FIXME: Use save-excursion
1100 "Kill the region between point and the mouse click.
1112 "Insert the last stretch of killed text at the position clicked on.
1113 Also move point to one end of the text thus inserted (normally the end),
1114 and set mark at the beginning.
1116 If `mouse-yank-at-point' is non-nil, insert at point
1117 regardless of where you click."
1119 ;; Give temporary modes such as isearch a chance to turn off.
1122 ;; Without this, confusing things happen upon e.g. inserting into
1123 ;; the middle of an active region.
1131 "Insert the primary selection at the position clicked on.
1132 Move point to the end of the inserted text, and set mark at
1133 beginning. If `mouse-yank-at-point' is non-nil, insert at point
1134 regardless of where you click."
1136 ;; Give temporary modes such as isearch a chance to turn off.
1138 ;; Without this, confusing things happen upon e.g. inserting into
1139 ;; the middle of an active region.
1149 "Copy the region between point and the mouse click in the kill ring.
1156 ;; This function used to delete the text between point and the mouse
1157 ;; whenever it was equal to the front of the kill ring, but some
1158 ;; people found that confusing.
1160 ;; The position of the last invocation of `mouse-save-then-kill'.
1164 ;; We must make our own undo boundaries
1165 ;; because they happen automatically only for the current buffer.
1168 ;; If we have no undo list in this buffer,
1169 ;; just delete.
1171 ;; Delete, but make the undo-list entry share with the kill ring.
1172 ;; First, delete just one char, so in case buffer is being modified
1173 ;; for the first time, the undo list records that fact.
1178 ;; Undo that deletion--but don't change the undo list!
1181 ;; Now delete the rest of the specified region,
1182 ;; but don't record it.
1188 ;; Search back in buffer-undo-list for the string
1189 ;; that came from deleting one character.
1192 ;; Replace it with an entry for the entire deleted text.
1198 "Set the region according to CLICK; the second time, kill it.
1199 CLICK should be a mouse click event.
1201 If the region is inactive, activate it temporarily. Set mark at
1202 the original point, and move point to the position of CLICK.
1204 If the region is already active, adjust it. Normally, do this by
1205 moving point or mark, whichever is closer, to CLICK. But if you
1206 have selected whole words or lines, move point or mark to the
1207 word or line boundary closest to CLICK instead.
1209 If `mouse-drag-copy-region' is non-nil, this command also saves the
1210 new region to the kill ring (replacing the previous kill if the
1211 previous region was just saved to the kill ring).
1213 If this command is called a second consecutive time with the same
1214 CLICK position, kill the region (or delete it
1215 if `mouse-drag-copy-region' is non-nil)"
1222 ;; Don't let a subsequent kill command append to this one.
1224 ;; Check if the user has multi-clicked to select words/lines.
1228 mouse-selection-click-count
1232 ;; If the user clicked without moving point, kill the region.
1233 ;; This also resets `mouse-selection-click-count'.
1238 ;; Region already saved in the previous click;
1239 ;; don't make a duplicate entry, just delete.
1245 ;; Otherwise, if there is a suitable region, adjust it by moving
1246 ;; one end (whichever is closer) to CLICK-PT.
1251 mouse-save-then-kill-posn)
1253 mouse-set-region))
1265 ;; Region already copied to kill-ring once, so replace.
1267 ;; Arrange for a repeated mouse-3 to kill the region.
1270 ;; Otherwise, set the mark where point is and move to CLICK-PT.
1282 \f
1293 ol)
1294 "An overlay which records the current secondary selection.
1299 ;; A marker which records the specified first end for a secondary selection.
1300 ;; May be nil.
1304 "Set one end of the secondary selection to the position clicked on.
1306 and complete the secondary selection."
1311 ;; Cancel any preexisting secondary selection.
1320 "Set the secondary selection to the text that the mouse is dragged over.
1321 This must be bound to a mouse drag event."
1325 beg
1332 'SECONDARY
1337 "Set the secondary selection to the text that the mouse is dragged over.
1338 Highlight the drag area as you move the mouse.
1339 This must be bound to a button-down mouse event.
1340 The function returns a non-nil value if it creates a secondary selection."
1351 ;; Don't count the mode line.
1357 ;; Double or triple press: make an initial selection
1358 ;; of one word or line.
1363 ;; Single-press: cancel any preexisting secondary selection.
1368 ;; FIXME: Use mouse-drag-track!
1377 nil
1381 ;; Are we moving within the original window?
1385 click-count)))
1398 mouse-secondary-overlay start-point))
1401 mouse-secondary-overlay start-point)))))))))
1412 nil))
1414 'SECONDARY
1419 "Insert the secondary selection at the position clicked on.
1420 Move point to the end of the inserted text.
1421 If `mouse-yank-at-point' is non-nil, insert at point
1422 regardless of where you click."
1424 ;; Give temporary modes such as isearch a chance to turn off.
1433 "Kill the text in the secondary selection.
1434 This is intended more as a keyboard command than as a mouse command
1435 but it can work as either one.
1437 The current buffer (in case of keyboard use), or the buffer clicked on,
1438 must be the one that the secondary selection is in. This requirement
1439 is to prevent accidents."
1455 "Set the secondary selection and save it to the kill ring.
1456 The second time, kill it. CLICK should be a mouse click event.
1458 If you have not called `mouse-start-secondary' in the clicked
1459 buffer, activate the secondary selection and set it between point
1460 and the click position CLICK.
1462 Otherwise, adjust the bounds of the secondary selection.
1463 Normally, do this by moving its beginning or end, whichever is
1464 closer, to CLICK. But if you have selected whole words or lines,
1465 adjust to the word or line boundary closest to CLICK instead.
1467 If this command is called a second consecutive time with the same
1468 CLICK position, kill the secondary selection."
1475 ;; Don't let a subsequent kill command append to this one.
1477 ;; Check if the user has multi-clicked to select words/lines.
1480 mouse-secondary-click-count
1488 ;; If the secondary selection is not active in BUF, activate it.
1498 ;; If the user clicked without moving point, delete the secondary
1499 ;; selection. This also resets `mouse-secondary-click-count'.
1508 ;; Otherwise, if there is a suitable secondary selection overlay,
1509 ;; adjust it by moving one end (whichever is closer) to CLICK-PT.
1518 ;; If the front of the kill ring comes from an immediately
1519 ;; previous use of this command, replace the entry.
1523 t)
1529 ;; Otherwise, set the secondary selection overlay.
1533 ;; All we have is one end of a selection, so put the other
1534 ;; end here.
1540 ;; Finally, set the window system's secondary selection.
1548 \f
1550 "Number of buffers in one pane (submenu) of the buffer menu.
1551 If we have lots of buffers, divide them into groups of
1552 `mouse-buffer-menu-maxlen' and make a pane (or submenu) for each one."
1559 will split the buffer menu by the major modes (see
1560 `mouse-buffer-menu-mode-groups') or just by menu length.
1561 Set to 1 (or even 0!) if you want to group by major mode always, and to
1562 a large number if you prefer a mixed multitude. The default is 4."
1578 ("Threads\\|Memory\\|Disassembly\\|Breakpoints\\|Frames\\|Locals\\|Registers\\|Inferior I/O\\|Debugger"
1582 Each element has the form (REGEXP . GROUPNAME).
1586 "Pop up a menu of buffers for selection with the mouse.
1587 This switches buffers in the window that you clicked on,
1588 and selects that window."
1596 window))
1600 ;; Make an alist of elements that look like (MENU-ITEM . BUFFER).
1603 ;; Divide all buffers into buckets for various major modes.
1604 ;; Each bucket looks like (MODE NAMESTRING BUFFERS...).
1614 adjusted-major-mode
1619 ;; Compute the sum of squares of sizes of the major-mode buckets.
1624 (+ sum-of-squares
1629 ;; Subdividing by major modes really helps, so let's do it.
1631 ;; Sort the list to put the most popular major modes first.
1636 ;; Make a separate submenu for each major mode
1637 ;; that has more than one buffer,
1638 ;; unless all the remaining buffers are less than 1/10 of them.
1648 this-mode-list)
1649 subdivided-menus))))
1653 ;; If any major modes are left over,
1654 ;; make a single submenu for them.
1658 ;; we don't need split-by-major-mode any more,
1659 ;; so we can ditch it with nconc (mapcan).
1664 subdivided-menus)))))
1673 head)
1702 list-buffers-directory)))
1704 elt)
1705 head))))
1707 ;; Compensate for the reversal that the above loop does.
1711 ;; If we have lots of buffers, divide them into groups of 20
1712 ;; and make a pane (or submenu) for each one.
1717 ;; Pull off the next mouse-buffer-menu-maxlen buffers
1718 ;; and make them the next element of sublist.
1722 nil))
1724 sublists))
1728 ;; Few buffers--put them all in one pane.
1730 \f
1734 ;; Font selection.
1753 ;; For these, we specify the pixel height and width.
1782 ;; We don't seem to have these; who knows what they are.
1783 ;; ("fg-18" "fg-18")
1784 ;; ("fg-25" "fg-25")
1785 ("lucidasanstypewriter-12" "-b&h-lucidatypewriter-medium-r-normal-sans-*-120-*-*-*-*-iso8859-1")
1786 ("lucidasanstypewriter-bold-14" "-b&h-lucidatypewriter-bold-r-normal-sans-*-140-*-*-*-*-iso8859-1")
1789 ;; ("lucidatypewriter-bold-r-24" "-b&h-lucidatypewriter-bold-r-normal-sans-24-240-75-75-m-140-iso8859-1")
1790 ;; ("fixed-medium-20" "-misc-fixed-medium-*-*-*-20-*-*-*-*-*-*-*")
1791 )))
1797 ;; For these, we specify the point height.
1822 ))))
1828 "Prompt for a font name, using `x-popup-menu', and return it."
1835 last-nonmenu-event
1843 "Set the default font for the selected frame.
1844 The argument FONTS is a list of font names; the first valid font
1845 in this list is used.
1847 When called interactively, pop up a menu and allow the user to
1848 choose a font."
1854 last-nonmenu-event
1856 ;; Append list of fontsets currently defined.
1880 "Show a menu for changing the default face in the current buffer."
1886 nil ; regenerate new fonts
1887 ;; Initialize mouse-appearance-menu-map
1896 ;; Font selector
1899 w32-use-w32-font-dialog))
1902 ;; If the select-font is unavailable, construct a menu.
1906 w32-fixed-font-alist
1907 x-fixed-font-alist)
1914 font-symbol)
1917 '("--"))
1918 (setq font-symbol (intern (cadr font)))
1919 (define-key submenu-map (vector font-symbol)
1920 (list 'menu-item (car font) font-symbol)))))
1921 (define-key font-submenu (vector (intern submenu-name))
1922 (list 'menu-item submenu-name submenu-map))))
1923 (define-key mouse-appearance-menu-map [font-submenu]
1924 (list 'menu-item "Change Text Font" font-submenu)))))
1925 (let ((choice (x-popup-menu event mouse-appearance-menu-map)))
1926 (setq choice (nth (1- (length choice)) choice))
1927 (cond ((eq choice 'text-scale-increase)
1928 (text-scale-increase 1))
1929 ((eq choice 'text-scale-decrease)
1930 (text-scale-increase -1))
1931 ((eq choice 'face-remap-reset-base)
1932 (text-scale-mode 0)
1933 (buffer-face-mode 0))
1934 (choice
1935 ;; Either choice == 'x-select-font, or choice is a
1936 ;; symbol whose name is a font.
1937 (let ((font (if (eq choice 'x-select-font)
1938 (x-select-font)
1939 (symbol-name choice))))
1940 (buffer-face-mode-invoke
1941 (if (fontp font 'font-spec)
1942 (list :font font)
1943 (font-face-attributes font))
1944 t (called-interactively-p 'interactive)))))))))
1946 \f
1947 ;; Drag and drop support.
1948 (defcustom mouse-drag-and-drop-region nil
1949 "If non-nil, dragging the mouse drags the region, if that exists.
1950 If the value is a modifier, such as `control' or `shift' or `meta',
1951 then if that modifier key is pressed when dropping the region, region
1952 text is copied instead of being cut."
1953 :type 'symbol
1954 :version "26.1"
1955 :group 'mouse)
1957 (defun mouse-drag-and-drop-region (event)
1958 "Move text in the region to point where mouse is dragged to.
1959 The transportation of text is also referred as `drag and drop'.
1960 When text is dragged over to a different buffer, or if a
1961 modifier key was pressed when dropping, and the value of the
1962 variable `mouse-drag-and-drop-region' is that modifier, the text
1963 is copied instead of being cut."
1964 (interactive "e")
1965 (require 'tooltip)
1966 (let ((start (region-beginning))
1967 (end (region-end))
1968 (point (point))
1969 (buffer (current-buffer))
1970 (window (selected-window))
1971 value-selection)
1972 (track-mouse
1973 ;; When event was click instead of drag, skip loop
1974 (while (progn
1975 (setq event (read-event))
1976 (mouse-movement-p event))
1977 (unless value-selection ; initialization
1978 (delete-overlay mouse-secondary-overlay)
1979 (setq value-selection (buffer-substring start end))
1980 (move-overlay mouse-secondary-overlay start end)) ; (deactivate-mark)
1981 (ignore-errors (deactivate-mark) ; care existing region in other window
1982 (mouse-set-point event)
1983 (tooltip-show value-selection)))
1984 (tooltip-hide))
1985 ;; Do not modify buffer under mouse when "event was click",
1986 ;; "drag negligible", or
1987 ;; "drag to read-only".
1988 (if (or (equal (mouse-posn-property (event-end event) 'face) 'region) ; "event was click"
1989 (member 'secondary-selection ; "drag negligible"
1990 (mapcar (lambda (xxx) (overlay-get xxx 'face))
1991 (overlays-at (posn-point (event-end event)))))
1992 buffer-read-only)
1993 ;; Do not modify buffer under mouse.
1994 (cond
1995 ;; "drag negligible" or "drag to read-only", restore region.
1996 (value-selection
1997 (select-window window) ; In case miss drag to other window
1998 (goto-char point)
1999 (setq deactivate-mark nil)
2000 (activate-mark))
2001 ;; "event was click"
2002 (t
2003 (deactivate-mark)
2004 (mouse-set-point event)))
2005 ;; Modify buffer under mouse by inserting text.
2006 (push-mark)
2007 (insert value-selection)
2008 (when (not (equal (mark) (point))) ; on success insert
2009 (setq deactivate-mark nil)
2010 (activate-mark)) ; have region on destination
2011 ;; Take care of initial region on source.
2012 (if (equal (current-buffer) buffer) ; when same buffer
2013 (let (deactivate-mark) ; remove text
2014 (unless (member mouse-drag-and-drop-region (event-modifiers event))
2015 (kill-region (overlay-start mouse-secondary-overlay)
2016 (overlay-end mouse-secondary-overlay))))
2017 (let ((window1 (selected-window))) ; when beyond buffer
2018 (select-window window)
2019 (goto-char point) ; restore point on source window
2020 (activate-mark) ; restore region
2021 (select-window window1))))
2022 (delete-overlay mouse-secondary-overlay)))
2023 \f
2025 ;;; Bindings for mouse commands.
2027 (global-set-key [down-mouse-1] 'mouse-drag-region)
2028 (global-set-key [mouse-1] 'mouse-set-point)
2029 (global-set-key [drag-mouse-1] 'mouse-set-region)
2031 (defun mouse--strip-first-event (_prompt)
2032 (substring (this-single-command-raw-keys) 1))
2034 (define-key function-key-map [left-fringe mouse-1] 'mouse--strip-first-event)
2035 (define-key function-key-map [right-fringe mouse-1] 'mouse--strip-first-event)
2037 (global-set-key [mouse-2] 'mouse-yank-primary)
2038 ;; Allow yanking also when the corresponding cursor is "in the fringe".
2039 (define-key function-key-map [right-fringe mouse-2] 'mouse--strip-first-event)
2040 (define-key function-key-map [left-fringe mouse-2] 'mouse--strip-first-event)
2041 (global-set-key [mouse-3] 'mouse-save-then-kill)
2042 (define-key function-key-map [right-fringe mouse-3] 'mouse--strip-first-event)
2043 (define-key function-key-map [left-fringe mouse-3] 'mouse--strip-first-event)
2045 ;; By binding these to down-going events, we let the user use the up-going
2046 ;; event to make the selection, saving a click.
2047 (global-set-key [C-down-mouse-1] 'mouse-buffer-menu)
2048 (if (not (eq system-type 'ms-dos))
2049 (global-set-key [S-down-mouse-1] 'mouse-appearance-menu))
2050 ;; C-down-mouse-2 is bound in facemenu.el.
2051 (global-set-key [C-down-mouse-3]
2052 `(menu-item ,(purecopy "Menu Bar") ignore
2053 :filter (lambda (_)
2054 (if (zerop (or (frame-parameter nil 'menu-bar-lines) 0))
2055 (mouse-menu-bar-map)
2056 (mouse-menu-major-mode-map)))))
2058 ;; Binding mouse-1 to mouse-select-window when on mode-, header-, or
2059 ;; vertical-line prevents Emacs from signaling an error when the mouse
2060 ;; button is released after dragging these lines, on non-toolkit
2061 ;; versions.
2062 (global-set-key [header-line down-mouse-1] 'mouse-drag-header-line)
2063 (global-set-key [header-line mouse-1] 'mouse-select-window)
2064 ;; (global-set-key [mode-line drag-mouse-1] 'mouse-select-window)
2065 (global-set-key [mode-line down-mouse-1] 'mouse-drag-mode-line)
2066 (global-set-key [mode-line mouse-1] 'mouse-select-window)
2067 (global-set-key [mode-line mouse-2] 'mouse-delete-other-windows)
2068 (global-set-key [mode-line mouse-3] 'mouse-delete-window)
2069 (global-set-key [mode-line C-mouse-2] 'mouse-split-window-horizontally)
2070 (global-set-key [vertical-scroll-bar C-mouse-2] 'mouse-split-window-vertically)
2071 (global-set-key [horizontal-scroll-bar C-mouse-2] 'mouse-split-window-horizontally)
2072 (global-set-key [vertical-line down-mouse-1] 'mouse-drag-vertical-line)
2073 (global-set-key [vertical-line mouse-1] 'mouse-select-window)
2074 (global-set-key [vertical-line C-mouse-2] 'mouse-split-window-vertically)
2075 (global-set-key [right-divider down-mouse-1] 'mouse-drag-vertical-line)
2076 (global-set-key [right-divider mouse-1] 'ignore)
2077 (global-set-key [right-divider C-mouse-2] 'mouse-split-window-vertically)
2078 (global-set-key [bottom-divider down-mouse-1] 'mouse-drag-mode-line)
2079 (global-set-key [bottom-divider mouse-1] 'ignore)
2080 (global-set-key [bottom-divider C-mouse-2] 'mouse-split-window-horizontally)
2082 (provide 'mouse)
2084 ;;; mouse.el ends here