274 lines
8.8 KiB
JavaScript
274 lines
8.8 KiB
JavaScript
/* Copyright 2016 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import {
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animationStarted, DEFAULT_SCALE, DEFAULT_SCALE_VALUE, localized, MAX_SCALE,
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MIN_SCALE, mozL10n, noContextMenuHandler
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} from './ui_utils';
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var PAGE_NUMBER_LOADING_INDICATOR = 'visiblePageIsLoading';
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var SCALE_SELECT_CONTAINER_PADDING = 8;
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var SCALE_SELECT_PADDING = 22;
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/**
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* @typedef {Object} ToolbarOptions
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* @property {HTMLDivElement} container - Container for the secondary toolbar.
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* @property {HTMLSpanElement} numPages - Label that contains number of pages.
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* @property {HTMLInputElement} pageNumber - Control for display and user input
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* of the current page number.
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* @property {HTMLSpanElement} scaleSelectContainer - Container where scale
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* controls are placed. The width is adjusted on UI initialization.
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* @property {HTMLSelectElement} scaleSelect - Scale selection control.
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* @property {HTMLOptionElement} customScaleOption - The item used to display
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* a non-predefined scale.
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* @property {HTMLButtonElement} previous - Button to go to the previous page.
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* @property {HTMLButtonElement} next - Button to go to the next page.
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* @property {HTMLButtonElement} zoomIn - Button to zoom in the pages.
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* @property {HTMLButtonElement} zoomOut - Button to zoom out the pages.
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* @property {HTMLButtonElement} viewFind - Button to open find bar.
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* @property {HTMLButtonElement} openFile - Button to open a new document.
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* @property {HTMLButtonElement} presentationModeButton - Button to switch to
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* presentation mode.
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* @property {HTMLButtonElement} download - Button to download the document.
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* @property {HTMLAElement} viewBookmark - Element to link current url of
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* the page view.
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*/
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/**
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* @class
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*/
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var Toolbar = (function ToolbarClosure() {
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/**
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* @constructs Toolbar
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* @param {ToolbarOptions} options
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* @param {HTMLDivElement} mainContainer
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* @param {EventBus} eventBus
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*/
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function Toolbar(options, mainContainer, eventBus) {
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this.toolbar = options.container;
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this.mainContainer = mainContainer;
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this.eventBus = eventBus;
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this.items = options;
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this._wasLocalized = false;
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this.reset();
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// Bind the event listeners for click and hand tool actions.
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this._bindListeners();
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}
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Toolbar.prototype = {
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setPageNumber: function (pageNumber, pageLabel) {
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this.pageNumber = pageNumber;
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this.pageLabel = pageLabel;
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this._updateUIState(false);
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},
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setPagesCount: function (pagesCount, hasPageLabels) {
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this.pagesCount = pagesCount;
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this.hasPageLabels = hasPageLabels;
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this._updateUIState(true);
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},
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setPageScale: function (pageScaleValue, pageScale) {
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this.pageScaleValue = pageScaleValue;
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this.pageScale = pageScale;
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this._updateUIState(false);
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},
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reset: function () {
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this.pageNumber = 0;
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this.pageLabel = null;
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this.hasPageLabels = false;
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this.pagesCount = 0;
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this.pageScaleValue = DEFAULT_SCALE_VALUE;
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this.pageScale = DEFAULT_SCALE;
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this._updateUIState(true);
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},
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_bindListeners: function Toolbar_bindClickListeners() {
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var eventBus = this.eventBus;
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var self = this;
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var items = this.items;
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items.previous.addEventListener('click', function() {
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eventBus.dispatch('previouspage');
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});
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items.next.addEventListener('click', function() {
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eventBus.dispatch('nextpage');
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});
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items.zoomIn.addEventListener('click', function() {
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eventBus.dispatch('zoomin');
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});
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items.zoomOut.addEventListener('click', function() {
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eventBus.dispatch('zoomout');
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});
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items.pageNumber.addEventListener('click', function() {
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this.select();
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});
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items.pageNumber.addEventListener('change', function() {
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eventBus.dispatch('pagenumberchanged', {
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source: self,
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value: this.value
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});
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});
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items.scaleSelect.addEventListener('change', function() {
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if (this.value === 'custom') {
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return;
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}
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eventBus.dispatch('scalechanged', {
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source: self,
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value: this.value
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});
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});
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items.presentationModeButton.addEventListener('click',
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function (e) {
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eventBus.dispatch('presentationmode');
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});
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items.openFile.addEventListener('click', function (e) {
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eventBus.dispatch('openfile');
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});
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items.print.addEventListener('click', function (e) {
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eventBus.dispatch('print');
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});
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items.download.addEventListener('click', function (e) {
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eventBus.dispatch('download');
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});
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// Suppress context menus for some controls
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items.scaleSelect.oncontextmenu = noContextMenuHandler;
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localized.then(this._localized.bind(this));
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},
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_localized: function Toolbar_localized() {
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this._wasLocalized = true;
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this._adjustScaleWidth();
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this._updateUIState(true);
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},
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_updateUIState: function Toolbar_updateUIState(resetNumPages) {
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function selectScaleOption(value, scale) {
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var options = items.scaleSelect.options;
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var predefinedValueFound = false;
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for (var i = 0, ii = options.length; i < ii; i++) {
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var option = options[i];
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if (option.value !== value) {
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option.selected = false;
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continue;
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}
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option.selected = true;
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predefinedValueFound = true;
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}
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if (!predefinedValueFound) {
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var customScale = Math.round(scale * 10000) / 100;
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items.customScaleOption.textContent =
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mozL10n.get('page_scale_percent', {scale: customScale},
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'{{scale}}%');
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items.customScaleOption.selected = true;
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}
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}
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if (!this._wasLocalized) {
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// Don't update UI state until we will localize the toolbar.
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return;
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}
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var pageNumber = this.pageNumber;
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var scaleValue = (this.pageScaleValue || this.pageScale).toString();
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var scale = this.pageScale;
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var items = this.items;
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var pagesCount = this.pagesCount;
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if (resetNumPages) {
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if (this.hasPageLabels) {
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items.pageNumber.type = 'text';
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} else {
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items.pageNumber.type = 'number';
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items.numPages.textContent = mozL10n.get('of_pages',
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{ pagesCount: pagesCount }, 'of {{pagesCount}}');
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}
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items.pageNumber.max = pagesCount;
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}
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if (this.hasPageLabels) {
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items.pageNumber.value = this.pageLabel;
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items.numPages.textContent = mozL10n.get('page_of_pages',
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{ pageNumber: pageNumber, pagesCount: pagesCount },
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'({{pageNumber}} of {{pagesCount}})');
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} else {
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items.pageNumber.value = pageNumber;
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}
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items.previous.disabled = (pageNumber <= 1);
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items.next.disabled = (pageNumber >= pagesCount);
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items.zoomOut.disabled = (scale <= MIN_SCALE);
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items.zoomIn.disabled = (scale >= MAX_SCALE);
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selectScaleOption(scaleValue, scale);
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},
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updateLoadingIndicatorState:
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function Toolbar_updateLoadingIndicatorState(loading) {
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var pageNumberInput = this.items.pageNumber;
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if (loading) {
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pageNumberInput.classList.add(PAGE_NUMBER_LOADING_INDICATOR);
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} else {
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pageNumberInput.classList.remove(PAGE_NUMBER_LOADING_INDICATOR);
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}
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},
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_adjustScaleWidth: function Toolbar_adjustScaleWidth() {
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var container = this.items.scaleSelectContainer;
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var select = this.items.scaleSelect;
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animationStarted.then(function() {
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// Adjust the width of the zoom box to fit the content.
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// Note: If the window is narrow enough that the zoom box is not
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// visible, we temporarily show it to be able to adjust its width.
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if (container.clientWidth === 0) {
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container.setAttribute('style', 'display: inherit;');
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}
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if (container.clientWidth > 0) {
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select.setAttribute('style', 'min-width: inherit;');
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var width = select.clientWidth + SCALE_SELECT_CONTAINER_PADDING;
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select.setAttribute('style', 'min-width: ' +
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(width + SCALE_SELECT_PADDING) + 'px;');
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container.setAttribute('style', 'min-width: ' + width + 'px; ' +
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'max-width: ' + width + 'px;');
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}
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});
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},
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};
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return Toolbar;
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})();
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export {
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Toolbar,
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};
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