overleaf/services/web/public/js/ace/range.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
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* notice, this list of conditions and the following disclaimer.
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* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
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* 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
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** END LICENSE BLOCK ***** */
define(function(require, exports, module) {
"use strict";
var comparePoints = function(p1, p2) {
return p1.row - p2.row || p1.column - p2.column;
};
/**
* This object is used in various places to indicate a region within the editor. To better visualize how this works, imagine a rectangle. Each quadrant of the rectangle is analogus to a range, as ranges contain a starting row and starting column, and an ending row, and ending column.
* @class Range
**/
/**
* Creates a new `Range` object with the given starting and ending row and column points.
* @param {Number} startRow The starting row
* @param {Number} startColumn The starting column
* @param {Number} endRow The ending row
* @param {Number} endColumn The ending column
*
* @constructor
**/
var Range = function(startRow, startColumn, endRow, endColumn) {
this.start = {
row: startRow,
column: startColumn
};
this.end = {
row: endRow,
column: endColumn
};
};
(function() {
/**
* Returns `true` if and only if the starting row and column, and ending row and column, are equivalent to those given by `range`.
* @param {Range} range A range to check against
*
* @return {Boolean}
**/
this.isEqual = function(range) {
return this.start.row === range.start.row &&
this.end.row === range.end.row &&
this.start.column === range.start.column &&
this.end.column === range.end.column;
};
/**
*
* Returns a string containing the range's row and column information, given like this:
* ```
* [start.row/start.column] -> [end.row/end.column]
* ```
* @return {String}
**/
this.toString = function() {
return ("Range: [" + this.start.row + "/" + this.start.column +
"] -> [" + this.end.row + "/" + this.end.column + "]");
};
/**
*
* Returns `true` if the `row` and `column` provided are within the given range. This can better be expressed as returning `true` if:
* ```javascript
* this.start.row <= row <= this.end.row &&
* this.start.column <= column <= this.end.column
* ```
* @param {Number} row A row to check for
* @param {Number} column A column to check for
* @returns {Boolean}
* @related Range.compare
**/
this.contains = function(row, column) {
return this.compare(row, column) == 0;
};
/**
* Compares `this` range (A) with another range (B).
* @param {Range} range A range to compare with
*
* @related Range.compare
* @returns {Number} This method returns one of the following numbers:<br/>
* <br/>
* * `-2`: (B) is in front of (A), and doesn't intersect with (A)<br/>
* * `-1`: (B) begins before (A) but ends inside of (A)<br/>
* * `0`: (B) is completely inside of (A) OR (A) is completely inside of (B)<br/>
* * `+1`: (B) begins inside of (A) but ends outside of (A)<br/>
* * `+2`: (B) is after (A) and doesn't intersect with (A)<br/>
* * `42`: FTW state: (B) ends in (A) but starts outside of (A)
**/
this.compareRange = function(range) {
var cmp,
end = range.end,
start = range.start;
cmp = this.compare(end.row, end.column);
if (cmp == 1) {
cmp = this.compare(start.row, start.column);
if (cmp == 1) {
return 2;
} else if (cmp == 0) {
return 1;
} else {
return 0;
}
} else if (cmp == -1) {
return -2;
} else {
cmp = this.compare(start.row, start.column);
if (cmp == -1) {
return -1;
} else if (cmp == 1) {
return 42;
} else {
return 0;
}
}
};
/**
* Checks the row and column points of `p` with the row and column points of the calling range.
*
* @param {Range} p A point to compare with
*
* @related Range.compare
* @returns {Number} This method returns one of the following numbers:<br/>
* * `0` if the two points are exactly equal<br/>
* * `-1` if `p.row` is less then the calling range<br/>
* * `1` if `p.row` is greater than the calling range<br/>
* <br/>
* If the starting row of the calling range is equal to `p.row`, and:<br/>
* * `p.column` is greater than or equal to the calling range's starting column, this returns `0`<br/>
* * Otherwise, it returns -1<br/>
*<br/>
* If the ending row of the calling range is equal to `p.row`, and:<br/>
* * `p.column` is less than or equal to the calling range's ending column, this returns `0`<br/>
* * Otherwise, it returns 1<br/>
**/
this.comparePoint = function(p) {
return this.compare(p.row, p.column);
};
/**
* Checks the start and end points of `range` and compares them to the calling range. Returns `true` if the `range` is contained within the caller's range.
* @param {Range} range A range to compare with
*
* @returns {Boolean}
* @related Range.comparePoint
**/
this.containsRange = function(range) {
return this.comparePoint(range.start) == 0 && this.comparePoint(range.end) == 0;
};
/**
* Returns `true` if passed in `range` intersects with the one calling this method.
* @param {Range} range A range to compare with
*
* @returns {Boolean}
**/
this.intersects = function(range) {
var cmp = this.compareRange(range);
return (cmp == -1 || cmp == 0 || cmp == 1);
};
/**
* Returns `true` if the caller's ending row point is the same as `row`, and if the caller's ending column is the same as `column`.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
* @returns {Boolean}
**/
this.isEnd = function(row, column) {
return this.end.row == row && this.end.column == column;
};
/**
* Returns `true` if the caller's starting row point is the same as `row`, and if the caller's starting column is the same as `column`.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
* @returns {Boolean}
**/
this.isStart = function(row, column) {
return this.start.row == row && this.start.column == column;
};
/**
* Sets the starting row and column for the range.
* @param {Number} row A row point to set
* @param {Number} column A column point to set
*
**/
this.setStart = function(row, column) {
if (typeof row == "object") {
this.start.column = row.column;
this.start.row = row.row;
} else {
this.start.row = row;
this.start.column = column;
}
};
/**
* Sets the starting row and column for the range.
* @param {Number} row A row point to set
* @param {Number} column A column point to set
*
**/
this.setEnd = function(row, column) {
if (typeof row == "object") {
this.end.column = row.column;
this.end.row = row.row;
} else {
this.end.row = row;
this.end.column = column;
}
};
/**
* Returns `true` if the `row` and `column` are within the given range.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
*
* @returns {Boolean}
* @related Range.compare
**/
this.inside = function(row, column) {
if (this.compare(row, column) == 0) {
if (this.isEnd(row, column) || this.isStart(row, column)) {
return false;
} else {
return true;
}
}
return false;
};
/**
* Returns `true` if the `row` and `column` are within the given range's starting points.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
* @returns {Boolean}
* @related Range.compare
**/
this.insideStart = function(row, column) {
if (this.compare(row, column) == 0) {
if (this.isEnd(row, column)) {
return false;
} else {
return true;
}
}
return false;
};
/**
* Returns `true` if the `row` and `column` are within the given range's ending points.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
* @returns {Boolean}
* @related Range.compare
*
**/
this.insideEnd = function(row, column) {
if (this.compare(row, column) == 0) {
if (this.isStart(row, column)) {
return false;
} else {
return true;
}
}
return false;
};
/**
* Checks the row and column points with the row and column points of the calling range.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
*
* @returns {Number} This method returns one of the following numbers:<br/>
* `0` if the two points are exactly equal <br/>
* `-1` if `p.row` is less then the calling range <br/>
* `1` if `p.row` is greater than the calling range <br/>
* <br/>
* If the starting row of the calling range is equal to `p.row`, and: <br/>
* `p.column` is greater than or equal to the calling range's starting column, this returns `0`<br/>
* Otherwise, it returns -1<br/>
* <br/>
* If the ending row of the calling range is equal to `p.row`, and: <br/>
* `p.column` is less than or equal to the calling range's ending column, this returns `0` <br/>
* Otherwise, it returns 1
**/
this.compare = function(row, column) {
if (!this.isMultiLine()) {
if (row === this.start.row) {
return column < this.start.column ? -1 : (column > this.end.column ? 1 : 0);
};
}
if (row < this.start.row)
return -1;
if (row > this.end.row)
return 1;
if (this.start.row === row)
return column >= this.start.column ? 0 : -1;
if (this.end.row === row)
return column <= this.end.column ? 0 : 1;
return 0;
};
/**
* Checks the row and column points with the row and column points of the calling range.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
* @returns {Number} This method returns one of the following numbers:<br/>
* <br/>
* `0` if the two points are exactly equal<br/>
* `-1` if `p.row` is less then the calling range<br/>
* `1` if `p.row` is greater than the calling range, or if `isStart` is `true`.<br/>
* <br/>
* If the starting row of the calling range is equal to `p.row`, and:<br/>
* `p.column` is greater than or equal to the calling range's starting column, this returns `0`<br/>
* Otherwise, it returns -1<br/>
* <br/>
* If the ending row of the calling range is equal to `p.row`, and:<br/>
* `p.column` is less than or equal to the calling range's ending column, this returns `0`<br/>
* Otherwise, it returns 1
*
**/
this.compareStart = function(row, column) {
if (this.start.row == row && this.start.column == column) {
return -1;
} else {
return this.compare(row, column);
}
};
/**
* Checks the row and column points with the row and column points of the calling range.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
*
* @returns {Number} This method returns one of the following numbers:<br/>
* `0` if the two points are exactly equal<br/>
* `-1` if `p.row` is less then the calling range<br/>
* `1` if `p.row` is greater than the calling range, or if `isEnd` is `true.<br/>
* <br/>
* If the starting row of the calling range is equal to `p.row`, and:<br/>
* `p.column` is greater than or equal to the calling range's starting column, this returns `0`<br/>
* Otherwise, it returns -1<br/>
*<br/>
* If the ending row of the calling range is equal to `p.row`, and:<br/>
* `p.column` is less than or equal to the calling range's ending column, this returns `0`<br/>
* Otherwise, it returns 1
*/
this.compareEnd = function(row, column) {
if (this.end.row == row && this.end.column == column) {
return 1;
} else {
return this.compare(row, column);
}
};
/**
* Checks the row and column points with the row and column points of the calling range.
* @param {Number} row A row point to compare with
* @param {Number} column A column point to compare with
*
*
* @returns {Number} This method returns one of the following numbers:<br/>
* * `1` if the ending row of the calling range is equal to `row`, and the ending column of the calling range is equal to `column`<br/>
* * `-1` if the starting row of the calling range is equal to `row`, and the starting column of the calling range is equal to `column`<br/>
* <br/>
* Otherwise, it returns the value after calling [[Range.compare `compare()`]].
*
**/
this.compareInside = function(row, column) {
if (this.end.row == row && this.end.column == column) {
return 1;
} else if (this.start.row == row && this.start.column == column) {
return -1;
} else {
return this.compare(row, column);
}
};
/**
* Returns the part of the current `Range` that occurs within the boundaries of `firstRow` and `lastRow` as a new `Range` object.
* @param {Number} firstRow The starting row
* @param {Number} lastRow The ending row
*
*
* @returns {Range}
**/
this.clipRows = function(firstRow, lastRow) {
if (this.end.row > lastRow)
var end = {row: lastRow + 1, column: 0};
else if (this.end.row < firstRow)
var end = {row: firstRow, column: 0};
if (this.start.row > lastRow)
var start = {row: lastRow + 1, column: 0};
else if (this.start.row < firstRow)
var start = {row: firstRow, column: 0};
return Range.fromPoints(start || this.start, end || this.end);
};
/**
* Changes the row and column points for the calling range for both the starting and ending points.
* @param {Number} row A new row to extend to
* @param {Number} column A new column to extend to
*
*
* @returns {Range} The original range with the new row
**/
this.extend = function(row, column) {
var cmp = this.compare(row, column);
if (cmp == 0)
return this;
else if (cmp == -1)
var start = {row: row, column: column};
else
var end = {row: row, column: column};
return Range.fromPoints(start || this.start, end || this.end);
};
this.isEmpty = function() {
return (this.start.row === this.end.row && this.start.column === this.end.column);
};
/**
*
* Returns `true` if the range spans across multiple lines.
* @returns {Boolean}
**/
this.isMultiLine = function() {
return (this.start.row !== this.end.row);
};
/**
*
* Returns a duplicate of the calling range.
* @returns {Range}
**/
this.clone = function() {
return Range.fromPoints(this.start, this.end);
};
/**
*
* Returns a range containing the starting and ending rows of the original range, but with a column value of `0`.
* @returns {Range}
**/
this.collapseRows = function() {
if (this.end.column == 0)
return new Range(this.start.row, 0, Math.max(this.start.row, this.end.row-1), 0)
else
return new Range(this.start.row, 0, this.end.row, 0)
};
/**
* Given the current `Range`, this function converts those starting and ending points into screen positions, and then returns a new `Range` object.
* @param {EditSession} session The `EditSession` to retrieve coordinates from
*
*
* @returns {Range}
**/
this.toScreenRange = function(session) {
var screenPosStart = session.documentToScreenPosition(this.start);
var screenPosEnd = session.documentToScreenPosition(this.end);
return new Range(
screenPosStart.row, screenPosStart.column,
screenPosEnd.row, screenPosEnd.column
);
};
/* experimental */
this.moveBy = function(row, column) {
this.start.row += row;
this.start.column += column;
this.end.row += row;
this.end.column += column;
};
}).call(Range.prototype);
/**
* Creates and returns a new `Range` based on the row and column of the given parameters.
* @param {Range} start A starting point to use
* @param {Range} end An ending point to use
*
* @returns {Range}
**/
Range.fromPoints = function(start, end) {
return new Range(start.row, start.column, end.row, end.column);
};
Range.comparePoints = comparePoints;
Range.comparePoints = function(p1, p2) {
return p1.row - p2.row || p1.column - p2.column;
};
exports.Range = Range;
});