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optimize longest line calculation

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This commit is contained in:
Fabian Jakobs 2010-04-07 16:27:02 +02:00
commit 9315c374e6
2 changed files with 44 additions and 26 deletions
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52
TextDocument.js
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@ -1,5 +1,7 @@
function TextDocument(text) {
function TextDocument(text)
{
this.lines = this._split(text);
this.modified = true;
}
TextDocument.prototype =
@ -8,6 +10,22 @@ TextDocument.prototype =
return text.split(/[\n\r]/)
},
getWidth : function()
{
if (this.modified)
{
this.modified = false;
var lines = this.lines;
var longestLine = 0;
for (var i=0; i < lines.length; i++) {
longestLine = Math.max(longestLine, lines[i].length);
}
this.width = longestLine;
}
return this.width;
},
getLine : function(row) {
return this.lines[row] || "";
},
@ -72,8 +90,24 @@ TextDocument.prototype =
return this.lines.length;
},
getTextRange : function(range)
{
if (range.start.row == range.end.row) {
return this.lines[range.start.row].substring(range.start.column, range.end.column);
} else {
var lines = [];
lines.push(this.lines[range.start.row].substring(range.start.column));
lines.push.apply(lines, this.lines.slice(range.start.row+1, range.end.row+1));
lines.push(this.lines[range.end.row].substring(0, range.end.column));
return lines.join("\n");
}
},
insert : function(position, text)
{
this.modified = true;
var newLines = this._split(text);
if (text == "\n")
@ -117,23 +151,11 @@ TextDocument.prototype =
};
}
},
getTextRange : function(range)
{
if (range.start.row == range.end.row) {
return this.lines[range.start.row].substring(range.start.column, range.end.column);
} else {
var lines = [];
lines.push(this.lines[range.start.row].substring(range.start.column));
lines.push.apply(lines, this.lines.slice(range.start.row+1, range.end.row+1));
lines.push(this.lines[range.end.row].substring(0, range.end.column));
return lines.join("\n");
}
},
remove : function(range)
{
this.modified = true;
var firstRow = range.start.row;
var lastRow = range.end.row;