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make undo coalescence configurable

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off by default
This commit is contained in:
nightwing 2013-06-17 02:05:27 +04:00
commit b18b86b6c9
1 changed files with 31 additions and 48 deletions
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79
lib/ace/editor.js
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@ -50,8 +50,6 @@ var defaultCommands = require("./commands/default_commands").commands;
var config = require("./config");
/**
*
*
* The main entry point into the Ace functionality.
*
* The `Editor` manages the [[EditSession]] (which manages [[Document]]s), as well as the [[VirtualRenderer]], which draws everything to the screen.
@ -101,59 +99,40 @@ var Editor = function(renderer, session) {
oop.implement(this, EventEmitter);
this.$historyTracker = function(e) {
if (!this.$mergeUndoDeltas)
return;
var previous = this.previousCommand || {command:{}};
var mergeableCommands = ["backspace", "del", "insertstring"];
if (e.command.name == "insertstring") {
var text = e.args;
if (this.mergeNextCommand === undefined) {
if (this.mergeNextCommand === undefined)
this.mergeNextCommand = true;
}
var previousCommand = this.previousCommand || {};
if (
// previous command was the same
"insertstring" == previousCommand.name
// cursor was not moved since last command
&& !this.cursorMoved
// previous command allows to coalesce with
&& this.mergeNextCommand
// previous insertion was not a new line or a whitespace
// or this is a sequence of a new line or a whitespace insertions
&& (!/ |\r\n|\r|\n/.test(text) || / |\r\n|\r|\n/.test(previousCommand.text))
// the sequence is not too long
&& (new Date()) - this.sequenceStartTime < 2000
)
this.session.mergeUndoDeltas = true;
else
this.sequenceStartTime = new Date().getTime();
this.previousCommand = {
name: "insertstring",
text: text
}
this.cursorMoved = false;
var shouldMerge = e.command.name == previous.command.name // previous command was the same
&& !this.cursorMoved // cursor was not moved since last command
&& this.mergeNextCommand // previous command allows to coalesce with
&& (!/\s/.test(text) || /\s/.test(previous.args)) // previous insertion was of same type
this.mergeNextCommand = true;
} else {
var mergeableCommands = ["backspace", "del"];
var previousCommand = this.previousCommand || {};
if (
// previous command was the same
e.command.name == previousCommand.name
// the command is mergeable
&& mergeableCommands.indexOf(e.command.name) !== -1
// cursor was not moved since last command
&& !this.cursorMoved
// the sequence is not too long
&& (new Date()) - this.sequenceStartTime < 2000
)
this.session.mergeUndoDeltas = true
else
if (mergeableCommands.indexOf(e.command.name) !== -1)
this.sequenceStartTime = new Date().getTime();
this.previousCommand = {
name: e.command.name,
text: e.command.text
}
this.cursorMoved = false;
var shouldMerge = e.command.name == previous.command.name // previous command was the same
&& mergeableCommands.indexOf(e.command.name) !== -1// the command is mergeable
&& !this.cursorMoved // cursor was not moved since last command
}
if (
this.$mergeUndoDeltas != "always"
&& Date.now() - this.sequenceStartTime < 2000
) {
shouldMerge = false; // the sequence is too long
}
if (shouldMerge)
this.session.mergeUndoDeltas = true;
else if (mergeableCommands.indexOf(e.command.name) !== -1)
this.sequenceStartTime = Date.now();
this.cursorMoved = false;
this.previousCommand = e;
};
/**
@ -2308,6 +2287,10 @@ config.defineOptions(Editor.prototype, "editor", {
values: ["ace", "slim", "smooth", "wide"],
initialValue: "ace"
},
mergeUndoDeltas: {
values: [false, true, "always"],
initialValue: false
},
behavioursEnabled: {initialValue: true},
wrapBehavioursEnabled: {initialValue: true},