mirror of
https://github.com/overleaf/overleaf.git
synced 2024-09-16 02:52:31 -04:00
599 lines
21 KiB
JavaScript
Executable file
599 lines
21 KiB
JavaScript
Executable file
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Distributed under the BSD license:
|
|
*
|
|
* Copyright (c) 2010, Ajax.org B.V.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Ajax.org B.V. nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
define(function(require, exports, module) {
|
|
"use strict";
|
|
|
|
var dom = require("../lib/dom");
|
|
require("../incremental_search");
|
|
var iSearchCommandModule = require("../commands/incremental_search_commands");
|
|
|
|
|
|
var screenToTextBlockCoordinates = function(x, y) {
|
|
var canvasPos = this.scroller.getBoundingClientRect();
|
|
|
|
var col = Math.floor(
|
|
(x + this.scrollLeft - canvasPos.left - this.$padding) / this.characterWidth
|
|
);
|
|
var row = Math.floor(
|
|
(y + this.scrollTop - canvasPos.top) / this.lineHeight
|
|
);
|
|
|
|
return this.session.screenToDocumentPosition(row, col);
|
|
};
|
|
|
|
var HashHandler = require("./hash_handler").HashHandler;
|
|
exports.handler = new HashHandler();
|
|
|
|
exports.handler.isEmacs = true;
|
|
exports.handler.$id = "ace/keyboard/emacs";
|
|
|
|
var initialized = false;
|
|
var $formerLongWords;
|
|
var $formerLineStart;
|
|
|
|
exports.handler.attach = function(editor) {
|
|
if (!initialized) {
|
|
initialized = true;
|
|
dom.importCssString('\
|
|
.emacs-mode .ace_cursor{\
|
|
border: 2px rgba(50,250,50,0.8) solid!important;\
|
|
-moz-box-sizing: border-box!important;\
|
|
-webkit-box-sizing: border-box!important;\
|
|
box-sizing: border-box!important;\
|
|
background-color: rgba(0,250,0,0.9);\
|
|
opacity: 0.5;\
|
|
}\
|
|
.emacs-mode .ace_hidden-cursors .ace_cursor{\
|
|
opacity: 1;\
|
|
background-color: transparent;\
|
|
}\
|
|
.emacs-mode .ace_overwrite-cursors .ace_cursor {\
|
|
opacity: 1;\
|
|
background-color: transparent;\
|
|
border-width: 0 0 2px 2px !important;\
|
|
}\
|
|
.emacs-mode .ace_text-layer {\
|
|
z-index: 4\
|
|
}\
|
|
.emacs-mode .ace_cursor-layer {\
|
|
z-index: 2\
|
|
}', 'emacsMode'
|
|
);
|
|
}
|
|
// in emacs, gotowordleft/right should not count a space as a word..
|
|
$formerLongWords = editor.session.$selectLongWords;
|
|
editor.session.$selectLongWords = true;
|
|
// CTRL-A should go to actual beginning of line
|
|
$formerLineStart = editor.session.$useEmacsStyleLineStart;
|
|
editor.session.$useEmacsStyleLineStart = true;
|
|
|
|
editor.session.$emacsMark = null; // the active mark
|
|
editor.session.$emacsMarkRing = editor.session.$emacsMarkRing || [];
|
|
|
|
editor.emacsMark = function() {
|
|
return this.session.$emacsMark;
|
|
}
|
|
|
|
editor.setEmacsMark = function(p) {
|
|
// to deactivate pass in a falsy value
|
|
this.session.$emacsMark = p;
|
|
}
|
|
|
|
editor.pushEmacsMark = function(p, activate) {
|
|
var prevMark = this.session.$emacsMark;
|
|
if (prevMark)
|
|
this.session.$emacsMarkRing.push(prevMark);
|
|
if (!p || activate) this.setEmacsMark(p)
|
|
else this.session.$emacsMarkRing.push(p);
|
|
}
|
|
|
|
editor.popEmacsMark = function() {
|
|
var mark = this.emacsMark();
|
|
if (mark) { this.setEmacsMark(null); return mark; }
|
|
return this.session.$emacsMarkRing.pop();
|
|
}
|
|
|
|
editor.getLastEmacsMark = function(p) {
|
|
return this.session.$emacsMark || this.session.$emacsMarkRing.slice(-1)[0];
|
|
}
|
|
|
|
editor.on("click", $resetMarkMode);
|
|
editor.on("changeSession", $kbSessionChange);
|
|
editor.renderer.screenToTextCoordinates = screenToTextBlockCoordinates;
|
|
editor.setStyle("emacs-mode");
|
|
editor.commands.addCommands(commands);
|
|
exports.handler.platform = editor.commands.platform;
|
|
editor.$emacsModeHandler = this;
|
|
editor.addEventListener('copy', this.onCopy);
|
|
editor.addEventListener('paste', this.onPaste);
|
|
};
|
|
|
|
exports.handler.detach = function(editor) {
|
|
delete editor.renderer.screenToTextCoordinates;
|
|
editor.session.$selectLongWords = $formerLongWords;
|
|
editor.session.$useEmacsStyleLineStart = $formerLineStart;
|
|
editor.removeEventListener("click", $resetMarkMode);
|
|
editor.removeEventListener("changeSession", $kbSessionChange);
|
|
editor.unsetStyle("emacs-mode");
|
|
editor.commands.removeCommands(commands);
|
|
editor.removeEventListener('copy', this.onCopy);
|
|
editor.removeEventListener('paste', this.onPaste);
|
|
};
|
|
|
|
var $kbSessionChange = function(e) {
|
|
if (e.oldSession) {
|
|
e.oldSession.$selectLongWords = $formerLongWords;
|
|
e.oldSession.$useEmacsStyleLineStart = $formerLineStart;
|
|
}
|
|
|
|
$formerLongWords = e.session.$selectLongWords;
|
|
e.session.$selectLongWords = true;
|
|
$formerLineStart = e.session.$useEmacsStyleLineStart;
|
|
e.session.$useEmacsStyleLineStart = true;
|
|
|
|
if (!e.session.hasOwnProperty('$emacsMark'))
|
|
e.session.$emacsMark = null;
|
|
if (!e.session.hasOwnProperty('$emacsMarkRing'))
|
|
e.session.$emacsMarkRing = [];
|
|
}
|
|
|
|
var $resetMarkMode = function(e) {
|
|
e.editor.session.$emacsMark = null;
|
|
}
|
|
|
|
var keys = require("../lib/keys").KEY_MODS,
|
|
eMods = {C: "ctrl", S: "shift", M: "alt", CMD: "command"},
|
|
combinations = ["C-S-M-CMD",
|
|
"S-M-CMD", "C-M-CMD", "C-S-CMD", "C-S-M",
|
|
"M-CMD", "S-CMD", "S-M", "C-CMD", "C-M", "C-S",
|
|
"CMD", "M", "S", "C"];
|
|
combinations.forEach(function(c) {
|
|
var hashId = 0;
|
|
c.split("-").forEach(function(c) {
|
|
hashId = hashId | keys[eMods[c]];
|
|
});
|
|
eMods[hashId] = c.toLowerCase() + "-";
|
|
});
|
|
|
|
exports.handler.onCopy = function(e, editor) {
|
|
if (editor.$handlesEmacsOnCopy) return;
|
|
editor.$handlesEmacsOnCopy = true;
|
|
exports.handler.commands.killRingSave.exec(editor);
|
|
delete editor.$handlesEmacsOnCopy;
|
|
}
|
|
|
|
exports.handler.onPaste = function(e, editor) {
|
|
editor.pushEmacsMark(editor.getCursorPosition());
|
|
}
|
|
|
|
exports.handler.bindKey = function(key, command) {
|
|
if (!key)
|
|
return;
|
|
|
|
var ckb = this.commandKeyBinding;
|
|
key.split("|").forEach(function(keyPart) {
|
|
keyPart = keyPart.toLowerCase();
|
|
ckb[keyPart] = command;
|
|
// register all partial key combos as null commands
|
|
// to be able to activate key combos with arbitrary length
|
|
// Example: if keyPart is "C-c C-l t" then "C-c C-l t" will
|
|
// get command assigned and "C-c" and "C-c C-l" will get
|
|
// a null command assigned in this.commandKeyBinding. For
|
|
// the lookup logic see handleKeyboard()
|
|
var keyParts = keyPart.split(" ").slice(0,-1);
|
|
keyParts.reduce(function(keyMapKeys, keyPart, i) {
|
|
var prefix = keyMapKeys[i-1] ? keyMapKeys[i-1] + ' ' : '';
|
|
return keyMapKeys.concat([prefix + keyPart]);
|
|
}, []).forEach(function(keyPart) {
|
|
if (!ckb[keyPart]) ckb[keyPart] = "null";
|
|
});
|
|
}, this);
|
|
}
|
|
|
|
exports.handler.handleKeyboard = function(data, hashId, key, keyCode) {
|
|
var editor = data.editor;
|
|
// insertstring data.count times
|
|
if (hashId == -1) {
|
|
editor.pushEmacsMark();
|
|
if (data.count) {
|
|
var str = Array(data.count + 1).join(key);
|
|
data.count = null;
|
|
return {command: "insertstring", args: str};
|
|
}
|
|
}
|
|
|
|
if (key == "\x00") return undefined;
|
|
|
|
var modifier = eMods[hashId];
|
|
|
|
// CTRL + number / universalArgument for setting data.count
|
|
if (modifier == "c-" || data.universalArgument) {
|
|
var prevCount = String(data.count || 0);
|
|
var count = parseInt(key[key.length - 1]);
|
|
if (typeof count === 'number' && !isNaN(count)) {
|
|
data.count = parseInt(prevCount + count);
|
|
return {command: "null"};
|
|
} else if (data.universalArgument) {
|
|
// if no number pressed use emacs defaults for universalArgument
|
|
// which is 4
|
|
data.count = 4;
|
|
}
|
|
}
|
|
data.universalArgument = false;
|
|
|
|
// this.commandKeyBinding maps key specs like "c-p" (for CTRL + P) to
|
|
// command objects, for lookup key needs to include the modifier
|
|
if (modifier) key = modifier + key;
|
|
|
|
// Key combos like CTRL+X H build up the data.keyChain
|
|
if (data.keyChain) key = data.keyChain += " " + key;
|
|
|
|
// Key combo prefixes get stored as "null" (String!) in this
|
|
// this.commandKeyBinding. When encountered no command is invoked but we
|
|
// buld up data.keyChain
|
|
var command = this.commandKeyBinding[key];
|
|
data.keyChain = command == "null" ? key : "";
|
|
|
|
// there really is no command
|
|
if (!command) return undefined;
|
|
|
|
// we pass b/c of key combo or universalArgument
|
|
if (command === "null") return {command: "null"};
|
|
|
|
if (command === "universalArgument") {
|
|
data.universalArgument = true;
|
|
return {command: "null"};
|
|
}
|
|
|
|
// lookup command
|
|
// TODO extract special handling of markmode
|
|
// TODO special case command.command is really unnecessary, remove
|
|
var args;
|
|
if (typeof command !== "string") {
|
|
args = command.args;
|
|
if (command.command) command = command.command;
|
|
if (command === "goorselect") {
|
|
command = editor.emacsMark() ? args[1] : args[0];
|
|
args = null;
|
|
}
|
|
}
|
|
|
|
if (typeof command === "string") {
|
|
if (command === "insertstring" ||
|
|
command === "splitline" ||
|
|
command === "togglecomment") {
|
|
editor.pushEmacsMark();
|
|
}
|
|
command = this.commands[command] || editor.commands.commands[command];
|
|
if (!command) return undefined;
|
|
}
|
|
|
|
if (!command.readonly && !command.isYank)
|
|
data.lastCommand = null;
|
|
|
|
if (data.count) {
|
|
var count = data.count;
|
|
data.count = 0;
|
|
if (!command || !command.handlesCount) {
|
|
return {
|
|
args: args,
|
|
command: {
|
|
exec: function(editor, args) {
|
|
for (var i = 0; i < count; i++)
|
|
command.exec(editor, args);
|
|
}
|
|
}
|
|
};
|
|
} else {
|
|
if (!args) args = {}
|
|
if (typeof args === 'object') args.count = count;
|
|
}
|
|
}
|
|
|
|
return {command: command, args: args};
|
|
};
|
|
|
|
exports.emacsKeys = {
|
|
// movement
|
|
"Up|C-p" : {command: "goorselect", args: ["golineup","selectup"]},
|
|
"Down|C-n" : {command: "goorselect", args: ["golinedown","selectdown"]},
|
|
"Left|C-b" : {command: "goorselect", args: ["gotoleft","selectleft"]},
|
|
"Right|C-f" : {command: "goorselect", args: ["gotoright","selectright"]},
|
|
"C-Left|M-b" : {command: "goorselect", args: ["gotowordleft","selectwordleft"]},
|
|
"C-Right|M-f" : {command: "goorselect", args: ["gotowordright","selectwordright"]},
|
|
"Home|C-a" : {command: "goorselect", args: ["gotolinestart","selecttolinestart"]},
|
|
"End|C-e" : {command: "goorselect", args: ["gotolineend","selecttolineend"]},
|
|
"C-Home|S-M-,": {command: "goorselect", args: ["gotostart","selecttostart"]},
|
|
"C-End|S-M-." : {command: "goorselect", args: ["gotoend","selecttoend"]},
|
|
|
|
// selection
|
|
"S-Up|S-C-p" : "selectup",
|
|
"S-Down|S-C-n" : "selectdown",
|
|
"S-Left|S-C-b" : "selectleft",
|
|
"S-Right|S-C-f" : "selectright",
|
|
"S-C-Left|S-M-b" : "selectwordleft",
|
|
"S-C-Right|S-M-f" : "selectwordright",
|
|
"S-Home|S-C-a" : "selecttolinestart",
|
|
"S-End|S-C-e" : "selecttolineend",
|
|
"S-C-Home" : "selecttostart",
|
|
"S-C-End" : "selecttoend",
|
|
|
|
"C-l" : "recenterTopBottom",
|
|
"M-s" : "centerselection",
|
|
"M-g": "gotoline",
|
|
"C-x C-p": "selectall",
|
|
|
|
// todo fix these
|
|
"C-Down": {command: "goorselect", args: ["gotopagedown","selectpagedown"]},
|
|
"C-Up": {command: "goorselect", args: ["gotopageup","selectpageup"]},
|
|
"PageDown|C-v": {command: "goorselect", args: ["gotopagedown","selectpagedown"]},
|
|
"PageUp|M-v": {command: "goorselect", args: ["gotopageup","selectpageup"]},
|
|
"S-C-Down": "selectpagedown",
|
|
"S-C-Up": "selectpageup",
|
|
|
|
"C-s": "iSearch",
|
|
"C-r": "iSearchBackwards",
|
|
|
|
"M-C-s": "findnext",
|
|
"M-C-r": "findprevious",
|
|
"S-M-5": "replace",
|
|
|
|
// basic editing
|
|
"Backspace": "backspace",
|
|
"Delete|C-d": "del",
|
|
"Return|C-m": {command: "insertstring", args: "\n"}, // "newline"
|
|
"C-o": "splitline",
|
|
|
|
"M-d|C-Delete": {command: "killWord", args: "right"},
|
|
"C-Backspace|M-Backspace|M-Delete": {command: "killWord", args: "left"},
|
|
"C-k": "killLine",
|
|
|
|
"C-y|S-Delete": "yank",
|
|
"M-y": "yankRotate",
|
|
"C-g": "keyboardQuit",
|
|
|
|
"C-w": "killRegion",
|
|
"M-w": "killRingSave",
|
|
"C-Space": "setMark",
|
|
"C-x C-x": "exchangePointAndMark",
|
|
|
|
"C-t": "transposeletters",
|
|
"M-u": "touppercase", // Doesn't work
|
|
"M-l": "tolowercase",
|
|
"M-/": "autocomplete", // Doesn't work
|
|
"C-u": "universalArgument",
|
|
|
|
"M-;": "togglecomment",
|
|
|
|
"C-/|C-x u|S-C--|C-z": "undo",
|
|
"S-C-/|S-C-x u|C--|S-C-z": "redo", //infinite undo?
|
|
// vertical editing
|
|
"C-x r": "selectRectangularRegion",
|
|
"M-x": {command: "focusCommandLine", args: "M-x "}
|
|
// todo
|
|
// "C-x C-t" "M-t" "M-c" "F11" "C-M- "M-q"
|
|
};
|
|
|
|
|
|
exports.handler.bindKeys(exports.emacsKeys);
|
|
|
|
exports.handler.addCommands({
|
|
recenterTopBottom: function(editor) {
|
|
var renderer = editor.renderer;
|
|
var pos = renderer.$cursorLayer.getPixelPosition();
|
|
var h = renderer.$size.scrollerHeight - renderer.lineHeight;
|
|
var scrollTop = renderer.scrollTop;
|
|
if (Math.abs(pos.top - scrollTop) < 2) {
|
|
scrollTop = pos.top - h;
|
|
} else if (Math.abs(pos.top - scrollTop - h * 0.5) < 2) {
|
|
scrollTop = pos.top;
|
|
} else {
|
|
scrollTop = pos.top - h * 0.5;
|
|
}
|
|
editor.session.setScrollTop(scrollTop);
|
|
},
|
|
selectRectangularRegion: function(editor) {
|
|
editor.multiSelect.toggleBlockSelection();
|
|
},
|
|
setMark: {
|
|
exec: function(editor, args) {
|
|
// Sets mark-mode and clears current selection.
|
|
// When mark is set, keyboard cursor movement commands become
|
|
// selection modification commands. That is,
|
|
// "goto" commands become "select" commands.
|
|
// Any insertion or mouse click resets mark-mode.
|
|
// setMark twice in a row at the same place resets markmode
|
|
if (args && args.count) {
|
|
var mark = editor.popEmacsMark();
|
|
mark && editor.selection.moveCursorToPosition(mark);
|
|
return;
|
|
}
|
|
|
|
var mark = editor.emacsMark(),
|
|
transientMarkModeActive = true;
|
|
|
|
// if transientMarkModeActive then mark behavior is a little
|
|
// different. Deactivate the mark when setMark is run with active
|
|
// mark
|
|
if (transientMarkModeActive && (mark || !editor.selection.isEmpty())) {
|
|
editor.pushEmacsMark();
|
|
editor.clearSelection();
|
|
return;
|
|
}
|
|
|
|
if (mark) {
|
|
var cp = editor.getCursorPosition();
|
|
if (editor.selection.isEmpty() &&
|
|
mark.row == cp.row && mark.column == cp.column) {
|
|
editor.pushEmacsMark();
|
|
return;
|
|
}
|
|
}
|
|
// turn on mark mode
|
|
mark = editor.getCursorPosition();
|
|
editor.setEmacsMark(mark);
|
|
editor.selection.setSelectionAnchor(mark.row, mark.column);
|
|
},
|
|
readonly: true,
|
|
handlesCount: true,
|
|
multiSelectAction: "forEach"
|
|
},
|
|
exchangePointAndMark: {
|
|
exec: function(editor, args) {
|
|
var sel = editor.selection;
|
|
if (args.count) {
|
|
var pos = editor.getCursorPosition();
|
|
sel.clearSelection();
|
|
sel.moveCursorToPosition(editor.popEmacsMark());
|
|
editor.pushEmacsMark(pos);
|
|
return;
|
|
}
|
|
var lastMark = editor.getLastEmacsMark();
|
|
var range = sel.getRange();
|
|
if (range.isEmpty()) {
|
|
sel.selectToPosition(lastMark);
|
|
return;
|
|
}
|
|
sel.setSelectionRange(range, !sel.isBackwards());
|
|
},
|
|
readonly: true,
|
|
handlesCount: true,
|
|
multiSelectAction: "forEach"
|
|
},
|
|
killWord: {
|
|
exec: function(editor, dir) {
|
|
editor.clearSelection();
|
|
if (dir == "left")
|
|
editor.selection.selectWordLeft();
|
|
else
|
|
editor.selection.selectWordRight();
|
|
|
|
var range = editor.getSelectionRange();
|
|
var text = editor.session.getTextRange(range);
|
|
exports.killRing.add(text);
|
|
|
|
editor.session.remove(range);
|
|
editor.clearSelection();
|
|
},
|
|
multiSelectAction: "forEach"
|
|
},
|
|
killLine: function(editor) {
|
|
editor.pushEmacsMark(null);
|
|
var pos = editor.getCursorPosition();
|
|
if (pos.column == 0 &&
|
|
editor.session.doc.getLine(pos.row).length == 0) {
|
|
// If an already empty line is killed, remove
|
|
// the line entirely
|
|
editor.selection.selectLine();
|
|
} else {
|
|
// otherwise just remove from the current cursor position
|
|
// to the end (but don't delete the selection if it's before
|
|
// the cursor)
|
|
editor.clearSelection();
|
|
editor.selection.selectLineEnd();
|
|
}
|
|
var range = editor.getSelectionRange();
|
|
var text = editor.session.getTextRange(range);
|
|
exports.killRing.add(text);
|
|
|
|
editor.session.remove(range);
|
|
editor.clearSelection();
|
|
},
|
|
yank: function(editor) {
|
|
editor.onPaste(exports.killRing.get() || '');
|
|
editor.keyBinding.$data.lastCommand = "yank";
|
|
},
|
|
yankRotate: function(editor) {
|
|
if (editor.keyBinding.$data.lastCommand != "yank")
|
|
return;
|
|
editor.undo();
|
|
editor.onPaste(exports.killRing.rotate());
|
|
editor.keyBinding.$data.lastCommand = "yank";
|
|
},
|
|
killRegion: {
|
|
exec: function(editor) {
|
|
exports.killRing.add(editor.getCopyText());
|
|
editor.commands.byName.cut.exec(editor);
|
|
},
|
|
readonly: true,
|
|
multiSelectAction: "forEach"
|
|
},
|
|
killRingSave: {
|
|
exec: function(editor) {
|
|
exports.killRing.add(editor.getCopyText());
|
|
setTimeout(function() {
|
|
var sel = editor.selection,
|
|
range = sel.getRange();
|
|
editor.pushEmacsMark(sel.isBackwards() ? range.end : range.start);
|
|
sel.clearSelection();
|
|
}, 0);
|
|
},
|
|
readonly: true
|
|
},
|
|
keyboardQuit: function(editor) {
|
|
editor.selection.clearSelection();
|
|
editor.setEmacsMark(null);
|
|
},
|
|
focusCommandLine: function(editor, arg) {
|
|
if (editor.showCommandLine)
|
|
editor.showCommandLine(arg);
|
|
}
|
|
});
|
|
|
|
exports.handler.addCommands(iSearchCommandModule.iSearchStartCommands);
|
|
|
|
var commands = exports.handler.commands;
|
|
commands.yank.isYank = true;
|
|
commands.yankRotate.isYank = true;
|
|
|
|
exports.killRing = {
|
|
$data: [],
|
|
add: function(str) {
|
|
str && this.$data.push(str);
|
|
if (this.$data.length > 30)
|
|
this.$data.shift();
|
|
},
|
|
get: function(n) {
|
|
n = n || 1;
|
|
return this.$data.slice(this.$data.length-n, this.$data.length).reverse().join('\n');
|
|
},
|
|
pop: function() {
|
|
if (this.$data.length > 1)
|
|
this.$data.pop();
|
|
return this.get();
|
|
},
|
|
rotate: function() {
|
|
this.$data.unshift(this.$data.pop());
|
|
return this.get();
|
|
}
|
|
};
|
|
|
|
});
|