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// Copyright (c) 2012 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';
/**
* Data model which contains information related to the document to print.
* @constructor
* @extends {cr.EventTarget}
*/
function DocumentInfo() {
cr.EventTarget.call(this);
/**
* Whether the document is styled by CSS media styles.
* @type {boolean}
* @private
*/
this.hasCssMediaStyles_ = false;
/**
* Whether the document has selected content.
* @type {boolean}
* @private
*/
this.hasSelection_ = false;
/**
* Whether the document to print is modifiable (i.e. can be reflowed).
* @type {boolean}
* @private
*/
this.isModifiable_ = true;
/**
* Whether scaling of the document is prohibited.
* @type {boolean}
* @private
*/
this.isScalingDisabled_ = false;
/**
* Margins of the document in points.
* @type {print_preview.Margins}
* @private
*/
this.margins_ = null;
/**
* Number of pages in the document to print.
* @type {number}
* @private
*/
this.pageCount_ = 0;
// Create the document info with some initial settings. Actual
// page-related information won't be set until preview generation occurs,
// so we'll use some defaults until then. This way, the print ticket store
// will be valid even if no preview can be generated.
var initialPageSize = new print_preview.Size(612, 792); // 8.5"x11"
/**
* Size of the pages of the document in points.
* @type {!print_preview.Size}
* @private
*/
this.pageSize_ = initialPageSize;
/**
* Printable area of the document in points.
* @type {!print_preview.PrintableArea}
* @private
*/
this.printableArea_ = new print_preview.PrintableArea(
new print_preview.Coordinate2d(0, 0), initialPageSize);
/**
* Title of document.
* @type {string}
* @private
*/
this.title_ = '';
/**
* Whether this data model has been initialized.
* @type {boolean}
* @private
*/
this.isInitialized_ = false;
};
/**
* Event types dispatched by this data model.
* @enum {string}
*/
DocumentInfo.EventType = {
CHANGE: 'print_preview.DocumentInfo.CHANGE'
};
DocumentInfo.prototype = {
__proto__: cr.EventTarget.prototype,
/** @return {boolean} Whether the document is styled by CSS media styles. */
get hasCssMediaStyles() {
return this.hasCssMediaStyles_;
},
/** @return {boolean} Whether the document has selected content. */
get hasSelection() {
return this.hasSelection_;
},
/**
* @return {boolean} Whether the document to print is modifiable (i.e. can
* be reflowed).
*/
get isModifiable() {
return this.isModifiable_;
},
/** @return {boolean} Whether scaling of the document is prohibited. */
get isScalingDisabled() {
return this.isScalingDisabled_;
},
/** @return {print_preview.Margins} Margins of the document in points. */
get margins() {
return this.margins_;
},
/** @return {number} Number of pages in the document to print. */
get pageCount() {
return this.pageCount_;
},
/**
* @return {!print_preview.Size} Size of the pages of the document in
* points.
*/
get pageSize() {
return this.pageSize_;
},
/**
* @return {!print_preview.PrintableArea} Printable area of the document in
* points.
*/
get printableArea() {
return this.printableArea_;
},
/** @return {string} Title of document. */
get title() {
return this.title_;
},
/**
* Initializes the state of the data model and dispatches a CHANGE event.
* @param {boolean} isModifiable Whether the document is modifiable.
* @param {string} title Title of the document.
* @param {boolean} hasSelection Whether the document has user-selected
* content.
*/
init: function(isModifiable, title, hasSelection) {
this.isModifiable_ = isModifiable;
this.title_ = title;
this.hasSelection_ = hasSelection;
this.isInitialized_ = true;
cr.dispatchSimpleEvent(this, DocumentInfo.EventType.CHANGE);
},
/**
* Updates whether scaling is disabled for the document and dispatches a
* CHANGE event.
* @param {boolean} isScalingDisabled Whether scaling of the document is
* prohibited.
*/
updateIsScalingDisabled: function(isScalingDisabled) {
if (this.isInitialized_ && this.isScalingDisabled_ != isScalingDisabled) {
this.isScalingDisabled_ = isScalingDisabled;
cr.dispatchSimpleEvent(this, DocumentInfo.EventType.CHANGE);
}
},
/**
* Updates the total number of pages in the document and dispatches a CHANGE
* event.
* @param {number} pageCount Number of pages in the document.
*/
updatePageCount: function(pageCount) {
if (this.isInitialized_ && this.pageCount_ != pageCount) {
this.pageCount_ = pageCount;
cr.dispatchSimpleEvent(this, DocumentInfo.EventType.CHANGE);
}
},
/**
* Updates information about each page and dispatches a CHANGE event.
* @param {!print_preview.PrintableArea} printableArea Printable area of the
* document in points.
* @param {!print_preview.Size} pageSize Size of the pages of the document
* in points.
* @param {boolean} hasCssMediaStyles Whether the document is styled by CSS
* media styles.
* @param {print_preview.Margins} margins Margins of the document in points.
*/
updatePageInfo: function(
printableArea, pageSize, hasCssMediaStyles, margins) {
if (this.isInitialized_ &&
(!this.printableArea_.equals(printableArea) ||
!this.pageSize_.equals(pageSize) ||
this.hasCssMediaStyles_ != hasCssMediaStyles ||
this.margins_ == null || !this.margins_.equals(margins))) {
this.printableArea_ = printableArea;
this.pageSize_ = pageSize;
this.hasCssMediaStyles_ = hasCssMediaStyles;
this.margins_ = margins;
cr.dispatchSimpleEvent(this, DocumentInfo.EventType.CHANGE);
}
}
};
// Export
return {
DocumentInfo: DocumentInfo
};
});
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