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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('print_preview', function() {
'use strict';
/**
* Checks if |text| has a valid margin value format. A valid format is
* parsable as a number and is greater than zero.
* Example: "1.00", "1", ".5", "1.1" are valid values.
* Example: "1.4dsf", "-1" are invalid.
* Note: The inch symbol (") at the end of |text| is allowed.
*
* @param {string} text The text to check.
* @return {number} The margin value represented by |text| or null if |text|
* does not represent a valid number.
*/
function extractMarginValue(text) {
// Remove whitespace anywhere in the string.
text.replace(/\s*/g, '');
if (text.length == 0)
return -1;
// Remove the inch(") symbol at end of string if present.
if (text.charAt(text.length - 1) == '\"')
text = text.slice(0, text.length - 1);
var regex = /^\d*(\.\d+)?$/
if (regex.test(text))
return parseFloat(text);
return -1;
}
/**
* @param {sting} text The text to check (in inches).
* @param {number} limit The upper bound of the valid margin range (in
* points).
* @return {boolean} True of |text| can be parsed and it is within the allowed
* range.
*/
function isMarginTextValid(text, limit) {
var value = extractMarginValue(text);
if (value == -1)
return false;
value = convertInchesToPoints(value);
return value <= limit;
}
/**
* Creates a Rect object. This object describes a rectangle in a 2D plane. The
* units of |x|, |y|, |width|, |height| are chosen by clients of this class.
* @constructor
*/
function Rect(x, y, width, height) {
// @type {number} Horizontal distance of the upper left corner from origin.
this.x = x;
// @type {number} Vertical distance of the upper left corner from origin.
this.y = y;
// @type {number} Width of |this| rectangle.
this.width = width;
// @type {number} Height of |this| rectangle.
this.height = height;
};
Rect.prototype = {
get right() {
return this.x + this.width;
},
get bottom() {
return this.y + this.height;
},
get middleX() {
return this.x + this.width / 2;
},
get middleY() {
return this.y + this.height / 2;
}
};
return {
extractMarginValue: extractMarginValue,
isMarginTextValid: isMarginTextValid,
Rect: Rect,
};
});
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