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// Copyright 2015 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.
(function() {
Polymer({
is: 'viewer-pdf-toolbar',
properties: {
/**
* Whether annotation mode can be entered. This would be false if for
* example the PDF is encrypted or password protected. Note, this is
* true regardless of whether the feature flag is enabled.
*/
annotationAvailable: {
type: Boolean,
value: true,
},
/** Whether the viewer is currently in annotation mode. */
annotationMode: {
type: Boolean,
notify: true,
value: false,
reflectToAttribute: true,
},
/** @type {?Object} */
annotationTool: {
type: Object,
value: null,
notify: true,
},
/**
* Tree of PDF bookmarks (empty if the document has no bookmarks).
* @type {!Array<!Bookmark>}
*/
bookmarks: {
type: Array,
value: () => [],
},
canRedoAnnotation: {
type: Boolean,
value: false,
},
canUndoAnnotation: {
type: Boolean,
value: false,
},
/** The number of pages in the PDF document. */
docLength: Number,
/** The title of the PDF document. */
docTitle: String,
/** The current loading progress of the PDF document (0 - 100). */
loadProgress: {
type: Number,
observer: 'loadProgressChanged_',
},
/** Whether the toolbar is opened and visible. */
opened: {
type: Boolean,
value: true,
},
/** The number of the page being viewed (1-based). */
pageNo: Number,
/** Whether the PDF Annotations feature is enabled. */
pdfAnnotationsEnabled: {
type: Boolean,
value: false,
},
/** Whether the Printing feature is enabled. */
printingEnabled: {
type: Boolean,
value: false,
},
strings: Object,
},
/** @type {?Object} */
animation_: null,
/**
* @param {number} newProgress
* @param {number} oldProgress
* @private
*/
loadProgressChanged_: function(newProgress, oldProgress) {
const loaded = newProgress >= 100;
const progressReset = newProgress < oldProgress;
if (progressReset || loaded) {
this.$.pageselector.classList.toggle('invisible', !loaded);
this.$.buttons.classList.toggle('invisible', !loaded);
this.$.progress.style.opacity = loaded ? 0 : 1;
this.$['annotations-bar'].hidden = !loaded || !this.annotationMode;
}
},
hide: function() {
if (this.opened && !this.shouldKeepOpen()) {
this.toggleVisibility();
}
},
show: function() {
if (!this.opened) {
this.toggleVisibility();
}
},
toggleVisibility: function() {
this.opened = !this.opened;
// We keep a handle on the animation in order to cancel the filling
// behavior of previous animations.
if (this.animation_) {
this.animation_.cancel();
}
if (this.opened) {
this.animation_ = this.animate(
[{transform: 'translateY(-100%)'}, {transform: 'translateY(0%)'}], {
duration: 250,
easing: 'cubic-bezier(0, 0, 0.2, 1)',
fill: 'forwards',
});
} else {
this.animation_ = this.animate(
[{transform: 'translateY(0%)'}, {transform: 'translateY(-100%)'}], {
duration: 250,
easing: 'cubic-bezier(0.4, 0, 1, 1)',
fill: 'forwards',
});
}
},
selectPageNumber: function() {
this.$.pageselector.select();
},
/** @return {boolean} Whether the toolbar should be kept open. */
shouldKeepOpen: function() {
return this.$.bookmarks.dropdownOpen || this.loadProgress < 100 ||
this.$.pageselector.isActive() || this.annotationMode;
},
/** @return {boolean} Whether a dropdown was open and was hidden. */
hideDropdowns: function() {
let result = false;
if (this.$.bookmarks.dropdownOpen) {
this.$.bookmarks.toggleDropdown();
result = true;
}
if (this.$.pen.dropdownOpen) {
this.$.pen.toggleDropdown();
result = true;
}
if (this.$.highlighter.dropdownOpen) {
this.$.highlighter.toggleDropdown();
result = true;
}
return result;
},
/** @param {number} lowerBound */
setDropdownLowerBound: function(lowerBound) {
this.$.bookmarks.lowerBound = lowerBound;
},
rotateRight: function() {
this.fire('rotate-right');
},
download: function() {
this.fire('save');
},
print: function() {
this.fire('print');
},
undo: function() {
this.fire('undo');
},
redo: function() {
this.fire('redo');
},
toggleAnnotation: function() {
this.annotationMode = !this.annotationMode;
if (this.annotationMode) {
// Select pen tool when entering annotation mode.
this.updateAnnotationTool_(this.$.pen);
}
this.dispatchEvent(new CustomEvent('annotation-mode-toggled', {
detail: {
value: this.annotationMode,
},
}));
},
/**
* @param {!Event} e
* @private
*/
annotationToolClicked_: function(e) {
this.updateAnnotationTool_(/** @type {!HTMLElement} */ (e.currentTarget));
},
/**
* @param {!Event} e
* @private
*/
annotationToolOptionChanged_: function(e) {
const element = e.currentTarget.parentElement;
if (!this.annotationTool || element.id != this.annotationTool.tool) {
return;
}
this.updateAnnotationTool_(e.currentTarget.parentElement);
},
/**
* @param {!HTMLElement} element
* @private
*/
updateAnnotationTool_: function(element) {
const tool = element.id;
const options = element.querySelector('viewer-pen-options') || {
selectedSize: 1,
selectedColor: null,
};
const attributeStyleMap = element.attributeStyleMap;
attributeStyleMap.set('--pen-tip-fill', options.selectedColor);
attributeStyleMap.set(
'--pen-tip-border',
options.selectedColor == '#000000' ? 'currentcolor' :
options.selectedColor);
this.annotationTool = {
tool: tool,
size: options.selectedSize,
color: options.selectedColor,
};
},
/**
* @param {string} toolName
* @return {boolean} Whether the annotation tool is using tool |toolName|.
* @private
*/
isAnnotationTool_: function(toolName) {
return !!this.annotationTool && this.annotationTool.tool === toolName;
},
});
})();
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