overleaf/services/web/public/js/ace/keyboard/emacs.js

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2014-02-12 05:23:40 -05:00
/* ***** 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();
}
};
});