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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 cr.define('print_preview', function() { | |
| 6 'use strict'; | |
| 7 | |
| 8 /** | |
| 9 * Creates a HeaderFooterSettings object. This object encapsulates all | |
| 10 * settings and logic related to the headers and footers checkbox. | |
| 11 * @constructor | |
| 12 */ | |
| 13 function HeaderFooterSettings() { | |
| 14 this.headerFooterOption_ = $('header-footer-option'); | |
| 15 this.headerFooterCheckbox_ = $('header-footer'); | |
| 16 this.addEventListeners_(); | |
| 17 } | |
| 18 | |
| 19 cr.addSingletonGetter(HeaderFooterSettings); | |
| 20 | |
| 21 HeaderFooterSettings.prototype = { | |
| 22 /** | |
| 23 * The checkbox corresponding to the headers and footers option. | |
| 24 * @type {HTMLInputElement} | |
| 25 */ | |
| 26 get headerFooterCheckbox() { | |
| 27 return this.headerFooterCheckbox_; | |
| 28 }, | |
| 29 | |
| 30 /** | |
| 31 * Checks whether the Headers and Footers checkbox is checked or not. | |
| 32 * @return {boolean} true if Headers and Footers are checked. | |
| 33 */ | |
| 34 hasHeaderFooter: function() { | |
| 35 return previewModifiable && this.headerFooterCheckbox_.checked; | |
| 36 }, | |
| 37 | |
| 38 /** | |
| 39 * Sets the state of the headers footers checkbox. | |
| 40 * @param {boolean} checked True if the headers footers checkbox shoule be | |
| 41 * checked, false if not. | |
| 42 */ | |
| 43 setChecked: function(checked) { | |
| 44 this.headerFooterCheckbox_.checked = checked; | |
| 45 }, | |
| 46 | |
| 47 /** | |
| 48 * Checks the printable area and updates the visibility of header footer | |
| 49 * option based on the selected margins. | |
| 50 * @param {{contentWidth: number, contentHeight: number, marginLeft: number, | |
| 51 * marginRight: number, marginTop: number, marginBottom: number, | |
| 52 * printableAreaX: number, printableAreaY: number, | |
| 53 * printableAreaWidth: number, printableAreaHeight: number}} | |
| 54 * pageLayout Specifies default page layout details in points. | |
| 55 * @param {number} marginsType Specifies the selected margins type value. | |
| 56 */ | |
| 57 checkAndHideHeaderFooterOption: function(pageLayout, marginsType) { | |
| 58 var headerFooterApplies = true; | |
| 59 if (marginsType == | |
| 60 print_preview.MarginSettings.MARGINS_VALUE_NO_MARGINS || | |
| 61 !previewModifiable) { | |
| 62 headerFooterApplies = false; | |
| 63 } else if (marginsType != | |
| 64 print_preview.MarginSettings.MARGINS_VALUE_MINIMUM) { | |
| 65 if (cr.isLinux || cr.isChromeOS) { | |
| 66 headerFooterApplies = pageLayout.marginTop > 0 || | |
| 67 pageLayout.marginBottom > 0; | |
| 68 } else { | |
| 69 var pageHeight = pageLayout.marginTop + pageLayout.marginBottom + | |
| 70 pageLayout.contentHeight; | |
| 71 headerFooterApplies = | |
| 72 (pageLayout.marginTop > pageLayout.printableAreaY) || | |
| 73 (pageLayout.marginBottom > | |
| 74 (pageHeight - pageLayout.printableAreaY - | |
| 75 pageLayout.printableAreaHeight)); | |
| 76 } | |
| 77 } | |
| 78 this.setVisible_(headerFooterApplies); | |
| 79 var headerFooterEvent = new cr.Event( | |
| 80 customEvents.HEADER_FOOTER_VISIBILITY_CHANGED); | |
| 81 headerFooterEvent.headerFooterApplies = headerFooterApplies; | |
| 82 document.dispatchEvent(headerFooterEvent); | |
| 83 }, | |
| 84 | |
| 85 /** | |
| 86 * Adding listeners to header footer related controls. | |
| 87 * @private | |
| 88 */ | |
| 89 addEventListeners_: function() { | |
| 90 this.headerFooterCheckbox_.onclick = | |
| 91 this.onHeaderFooterChanged_.bind(this); | |
| 92 document.addEventListener(customEvents.PDF_LOADED, | |
| 93 this.onPDFLoaded_.bind(this)); | |
| 94 }, | |
| 95 | |
| 96 /** | |
| 97 * Listener executing when the user selects or de-selects the headers | |
| 98 * and footers option. | |
| 99 * @private | |
| 100 */ | |
| 101 onHeaderFooterChanged_: function() { | |
| 102 requestPrintPreview(); | |
| 103 }, | |
| 104 | |
| 105 /** | |
| 106 * Listener executing when a |customEvents.PDF_LOADED| event occurs. | |
| 107 * @private | |
| 108 */ | |
| 109 onPDFLoaded_: function() { | |
| 110 if (!previewModifiable) | |
| 111 this.setVisible_(false); | |
| 112 }, | |
| 113 | |
| 114 /** | |
| 115 * Hides or shows |this.headerFooterOption_|. | |
| 116 * @param {boolean} visible True if |this.headerFooterOption_| should be | |
| 117 * shown. | |
| 118 * @private | |
| 119 */ | |
| 120 setVisible_: function(visible) { | |
| 121 this.headerFooterOption_.style.display = visible ? 'block' : 'none'; | |
| 122 }, | |
| 123 }; | |
| 124 | |
| 125 return { | |
| 126 HeaderFooterSettings: HeaderFooterSettings | |
| 127 }; | |
| 128 }); | |
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Chromium Code Reviews
Issue 10108001:
Refactor print preview web ui (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src