/* Copyright 2016 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { AnnotationEditorType, noContextMenu } from "pdfjs-lib";
import {
DEFAULT_SCALE,
DEFAULT_SCALE_VALUE,
MAX_SCALE,
MIN_SCALE,
toggleCheckedBtn,
} from "./ui_utils.js";
/**
* @typedef {Object} ToolbarOptions
* @property {HTMLDivElement} container - Container for the secondary toolbar.
* @property {HTMLSpanElement} numPages - Label that contains number of pages.
* @property {HTMLInputElement} pageNumber - Control for display and user input
* of the current page number.
* @property {HTMLSelectElement} scaleSelect - Scale selection control.
* Its width is adjusted, when necessary, on UI localization.
* @property {HTMLOptionElement} customScaleOption - The item used to display
* a non-predefined scale.
* @property {HTMLButtonElement} previous - Button to go to the previous page.
* @property {HTMLButtonElement} next - Button to go to the next page.
* @property {HTMLButtonElement} zoomIn - Button to zoom in the pages.
* @property {HTMLButtonElement} zoomOut - Button to zoom out the pages.
* @property {HTMLButtonElement} viewFind - Button to open find bar.
* @property {HTMLButtonElement} editorFreeTextButton - Button to switch to
* FreeText editing.
* @property {HTMLButtonElement} download - Button to download the document.
*/
class Toolbar {
/**
* @param {ToolbarOptions} options
* @param {EventBus} eventBus
*/
constructor(options, eventBus) {
this.toolbar = options.container;
this.eventBus = eventBus;
this.buttons = [
{ element: options.previous, eventName: "previouspage" },
{ element: options.next, eventName: "nextpage" },
{ element: options.zoomIn, eventName: "zoomin" },
{ element: options.zoomOut, eventName: "zoomout" },
{ element: options.print, eventName: "print" },
{ element: options.download, eventName: "download" },
{
element: options.editorFreeTextButton,
eventName: "switchannotationeditormode",
eventDetails: {
get mode() {
const { classList } = options.editorFreeTextButton;
return classList.contains("toggled")
? AnnotationEditorType.NONE
: AnnotationEditorType.FREETEXT;
},
},
},
{
element: options.editorHighlightButton,
eventName: "switchannotationeditormode",
eventDetails: {
get mode() {
const { classList } = options.editorHighlightButton;
return classList.contains("toggled")
? AnnotationEditorType.NONE
: AnnotationEditorType.HIGHLIGHT;
},
},
},
{
element: options.editorInkButton,
eventName: "switchannotationeditormode",
eventDetails: {
get mode() {
const { classList } = options.editorInkButton;
return classList.contains("toggled")
? AnnotationEditorType.NONE
: AnnotationEditorType.INK;
},
},
},
{
element: options.editorStampButton,
eventName: "switchannotationeditormode",
eventDetails: {
get mode() {
const { classList } = options.editorStampButton;
return classList.contains("toggled")
? AnnotationEditorType.NONE
: AnnotationEditorType.STAMP;
},
},
},
];
this.items = {
numPages: options.numPages,
pageNumber: options.pageNumber,
scaleSelect: options.scaleSelect,
customScaleOption: options.customScaleOption,
previous: options.previous,
next: options.next,
zoomIn: options.zoomIn,
zoomOut: options.zoomOut,
};
// Bind the event listeners for click and various other actions.
this.#bindListeners(options);
this.reset();
}
setPageNumber(pageNumber, pageLabel) {
this.pageNumber = pageNumber;
this.pageLabel = pageLabel;
this.#updateUIState(false);
}
setPagesCount(pagesCount, hasPageLabels) {
this.pagesCount = pagesCount;
this.hasPageLabels = hasPageLabels;
this.#updateUIState(true);
}
setPageScale(pageScaleValue, pageScale) {
this.pageScaleValue = (pageScaleValue || pageScale).toString();
this.pageScale = pageScale;
this.#updateUIState(false);
}
reset() {
this.pageNumber = 0;
this.pageLabel = null;
this.hasPageLabels = false;
this.pagesCount = 0;
this.pageScaleValue = DEFAULT_SCALE_VALUE;
this.pageScale = DEFAULT_SCALE;
this.#updateUIState(true);
this.updateLoadingIndicatorState();
// Reset the Editor buttons too, since they're document specific.
this.eventBus.dispatch("toolbarreset", { source: this });
}
#bindListeners(options) {
const { pageNumber, scaleSelect } = this.items;
const self = this;
// The buttons within the toolbar.
for (const { element, eventName, eventDetails } of this.buttons) {
element.addEventListener("click", evt => {
if (eventName !== null) {
this.eventBus.dispatch(eventName, {
source: this,
...eventDetails,
// evt.detail is the number of clicks.
isFromKeyboard: evt.detail === 0,
});
}
});
}
// The non-button elements within the toolbar.
pageNumber.addEventListener("click", function () {
this.select();
});
pageNumber.addEventListener("change", function () {
self.eventBus.dispatch("pagenumberchanged", {
source: self,
value: this.value,
});
});
scaleSelect.addEventListener("change", function () {
if (this.value === "custom") {
return;
}
self.eventBus.dispatch("scalechanged", {
source: self,
value: this.value,
});
});
// Here we depend on browsers dispatching the "click" event *after* the
// "change" event, when the <select>-element changes.
scaleSelect.addEventListener("click", function (evt) {
const target = evt.target;
// Remove focus when an <option>-element was *clicked*, to improve the UX
// for mouse users (fixes bug 1300525 and issue 4923).
if (
this.value === self.pageScaleValue &&
target.tagName.toUpperCase() === "OPTION"
) {
this.blur();
}
});
// Suppress context menus for some controls.
scaleSelect.oncontextmenu = noContextMenu;
this.#bindEditorToolsListener(options);
}
#bindEditorToolsListener({
editorFreeTextButton,
editorFreeTextParamsToolbar,
editorHighlightButton,
editorHighlightParamsToolbar,
editorInkButton,
editorInkParamsToolbar,
editorStampButton,
editorStampParamsToolbar,
}) {
const editorModeChanged = ({ mode }) => {
toggleCheckedBtn(
editorFreeTextButton,
mode === AnnotationEditorType.FREETEXT,
editorFreeTextParamsToolbar
);
toggleCheckedBtn(
editorHighlightButton,
mode === AnnotationEditorType.HIGHLIGHT,
editorHighlightParamsToolbar
);
toggleCheckedBtn(
editorInkButton,
mode === AnnotationEditorType.INK,
editorInkParamsToolbar
);
toggleCheckedBtn(
editorStampButton,
mode === AnnotationEditorType.STAMP,
editorStampParamsToolbar
);
const isDisable = mode === AnnotationEditorType.DISABLE;
editorFreeTextButton.disabled = isDisable;
editorHighlightButton.disabled = isDisable;
editorInkButton.disabled = isDisable;
editorStampButton.disabled = isDisable;
};
this.eventBus._on("annotationeditormodechanged", editorModeChanged);
this.eventBus._on("toolbarreset", evt => {
if (evt.source === this) {
editorModeChanged({ mode: AnnotationEditorType.DISABLE });
}
});
}
#updateUIState(resetNumPages = false) {
const { pageNumber, pagesCount, pageScaleValue, pageScale, items } = this;
if (resetNumPages) {
if (this.hasPageLabels) {
items.pageNumber.type = "text";
items.numPages.setAttribute("data-l10n-id", "pdfjs-page-of-pages");
} else {
items.pageNumber.type = "number";
items.numPages.setAttribute("data-l10n-id", "pdfjs-of-pages");
items.numPages.setAttribute(
"data-l10n-args",
JSON.stringify({ pagesCount })
);
}
items.pageNumber.max = pagesCount;
}
if (this.hasPageLabels) {
items.pageNumber.value = this.pageLabel;
items.numPages.setAttribute(
"data-l10n-args",
JSON.stringify({ pageNumber, pagesCount })
);
} else {
items.pageNumber.value = pageNumber;
}
items.previous.disabled = pageNumber <= 1;
items.next.disabled = pageNumber >= pagesCount;
items.zoomOut.disabled = pageScale <= MIN_SCALE;
items.zoomIn.disabled = pageScale >= MAX_SCALE;
let predefinedValueFound = false;
for (const option of items.scaleSelect.options) {
if (option.value !== pageScaleValue) {
option.selected = false;
continue;
}
option.selected = true;
predefinedValueFound = true;
}
if (!predefinedValueFound) {
items.customScaleOption.selected = true;
items.customScaleOption.setAttribute(
"data-l10n-args",
JSON.stringify({
scale: Math.round(pageScale * 10000) / 100,
})
);
}
}
updateLoadingIndicatorState(loading = false) {
const { pageNumber } = this.items;
pageNumber.classList.toggle("loading", loading);
}
}
export { Toolbar };