1 |
|
2 |
|
3 |
|
4 |
|
5 |
|
6 |
|
7 |
|
8 |
|
9 |
|
10 |
|
11 |
|
12 |
|
13 |
|
14 |
|
15 |
|
16 |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 |
|
22 | "use strict";
|
23 |
|
24 | Object.defineProperty(exports, "__esModule", {
|
25 | value: true
|
26 | });
|
27 | exports.PDFOutlineViewer = void 0;
|
28 |
|
29 | var _base_tree_viewer = require("./base_tree_viewer.js");
|
30 |
|
31 | var _pdf = require("../pdf");
|
32 |
|
33 | var _ui_utils = require("./ui_utils.js");
|
34 |
|
35 | class PDFOutlineViewer extends _base_tree_viewer.BaseTreeViewer {
|
36 | constructor(options) {
|
37 | super(options);
|
38 | this.linkService = options.linkService;
|
39 |
|
40 | this.eventBus._on("toggleoutlinetree", this._toggleAllTreeItems.bind(this));
|
41 |
|
42 | this.eventBus._on("currentoutlineitem", this._currentOutlineItem.bind(this));
|
43 |
|
44 | this.eventBus._on("pagechanging", evt => {
|
45 | this._currentPageNumber = evt.pageNumber;
|
46 | });
|
47 |
|
48 | this.eventBus._on("pagesloaded", evt => {
|
49 | this._isPagesLoaded = !!evt.pagesCount;
|
50 |
|
51 | if (this._currentOutlineItemCapability && !this._currentOutlineItemCapability.settled) {
|
52 | this._currentOutlineItemCapability.resolve(this._isPagesLoaded);
|
53 | }
|
54 | });
|
55 |
|
56 | this.eventBus._on("sidebarviewchanged", evt => {
|
57 | this._sidebarView = evt.view;
|
58 | });
|
59 | }
|
60 |
|
61 | reset() {
|
62 | super.reset();
|
63 | this._outline = null;
|
64 | this._pageNumberToDestHashCapability = null;
|
65 | this._currentPageNumber = 1;
|
66 | this._isPagesLoaded = null;
|
67 |
|
68 | if (this._currentOutlineItemCapability && !this._currentOutlineItemCapability.settled) {
|
69 | this._currentOutlineItemCapability.resolve(false);
|
70 | }
|
71 |
|
72 | this._currentOutlineItemCapability = null;
|
73 | }
|
74 |
|
75 | _dispatchEvent(outlineCount) {
|
76 | this._currentOutlineItemCapability = (0, _pdf.createPromiseCapability)();
|
77 |
|
78 | if (outlineCount === 0 || this._pdfDocument?.loadingParams.disableAutoFetch) {
|
79 | this._currentOutlineItemCapability.resolve(false);
|
80 | } else if (this._isPagesLoaded !== null) {
|
81 | this._currentOutlineItemCapability.resolve(this._isPagesLoaded);
|
82 | }
|
83 |
|
84 | this.eventBus.dispatch("outlineloaded", {
|
85 | source: this,
|
86 | outlineCount,
|
87 | currentOutlineItemPromise: this._currentOutlineItemCapability.promise
|
88 | });
|
89 | }
|
90 |
|
91 | _bindLink(element, {
|
92 | url,
|
93 | newWindow,
|
94 | dest
|
95 | }) {
|
96 | const {
|
97 | linkService
|
98 | } = this;
|
99 |
|
100 | if (url) {
|
101 | linkService.addLinkAttributes(element, url, newWindow);
|
102 | return;
|
103 | }
|
104 |
|
105 | element.href = linkService.getDestinationHash(dest);
|
106 |
|
107 | element.onclick = evt => {
|
108 | this._updateCurrentTreeItem(evt.target.parentNode);
|
109 |
|
110 | if (dest) {
|
111 | linkService.goToDestination(dest);
|
112 | }
|
113 |
|
114 | return false;
|
115 | };
|
116 | }
|
117 |
|
118 | _setStyles(element, {
|
119 | bold,
|
120 | italic
|
121 | }) {
|
122 | if (bold) {
|
123 | element.style.fontWeight = "bold";
|
124 | }
|
125 |
|
126 | if (italic) {
|
127 | element.style.fontStyle = "italic";
|
128 | }
|
129 | }
|
130 |
|
131 | _addToggleButton(div, {
|
132 | count,
|
133 | items
|
134 | }) {
|
135 | let hidden = false;
|
136 |
|
137 | if (count < 0) {
|
138 | let totalCount = items.length;
|
139 |
|
140 | if (totalCount > 0) {
|
141 | const queue = [...items];
|
142 |
|
143 | while (queue.length > 0) {
|
144 | const {
|
145 | count: nestedCount,
|
146 | items: nestedItems
|
147 | } = queue.shift();
|
148 |
|
149 | if (nestedCount > 0 && nestedItems.length > 0) {
|
150 | totalCount += nestedItems.length;
|
151 | queue.push(...nestedItems);
|
152 | }
|
153 | }
|
154 | }
|
155 |
|
156 | if (Math.abs(count) === totalCount) {
|
157 | hidden = true;
|
158 | }
|
159 | }
|
160 |
|
161 | super._addToggleButton(div, hidden);
|
162 | }
|
163 |
|
164 | _toggleAllTreeItems() {
|
165 | if (!this._outline) {
|
166 | return;
|
167 | }
|
168 |
|
169 | super._toggleAllTreeItems();
|
170 | }
|
171 |
|
172 | render({
|
173 | outline,
|
174 | pdfDocument
|
175 | }) {
|
176 | if (this._outline) {
|
177 | this.reset();
|
178 | }
|
179 |
|
180 | this._outline = outline || null;
|
181 | this._pdfDocument = pdfDocument || null;
|
182 |
|
183 | if (!outline) {
|
184 | this._dispatchEvent(0);
|
185 |
|
186 | return;
|
187 | }
|
188 |
|
189 | const fragment = document.createDocumentFragment();
|
190 | const queue = [{
|
191 | parent: fragment,
|
192 | items: outline
|
193 | }];
|
194 | let outlineCount = 0,
|
195 | hasAnyNesting = false;
|
196 |
|
197 | while (queue.length > 0) {
|
198 | const levelData = queue.shift();
|
199 |
|
200 | for (const item of levelData.items) {
|
201 | const div = document.createElement("div");
|
202 | div.className = "treeItem";
|
203 | const element = document.createElement("a");
|
204 |
|
205 | this._bindLink(element, item);
|
206 |
|
207 | this._setStyles(element, item);
|
208 |
|
209 | element.textContent = this._normalizeTextContent(item.title);
|
210 | div.append(element);
|
211 |
|
212 | if (item.items.length > 0) {
|
213 | hasAnyNesting = true;
|
214 |
|
215 | this._addToggleButton(div, item);
|
216 |
|
217 | const itemsDiv = document.createElement("div");
|
218 | itemsDiv.className = "treeItems";
|
219 | div.append(itemsDiv);
|
220 | queue.push({
|
221 | parent: itemsDiv,
|
222 | items: item.items
|
223 | });
|
224 | }
|
225 |
|
226 | levelData.parent.append(div);
|
227 | outlineCount++;
|
228 | }
|
229 | }
|
230 |
|
231 | this._finishRendering(fragment, outlineCount, hasAnyNesting);
|
232 | }
|
233 |
|
234 | async _currentOutlineItem() {
|
235 | if (!this._isPagesLoaded) {
|
236 | throw new Error("_currentOutlineItem: All pages have not been loaded.");
|
237 | }
|
238 |
|
239 | if (!this._outline || !this._pdfDocument) {
|
240 | return;
|
241 | }
|
242 |
|
243 | const pageNumberToDestHash = await this._getPageNumberToDestHash(this._pdfDocument);
|
244 |
|
245 | if (!pageNumberToDestHash) {
|
246 | return;
|
247 | }
|
248 |
|
249 | this._updateCurrentTreeItem(null);
|
250 |
|
251 | if (this._sidebarView !== _ui_utils.SidebarView.OUTLINE) {
|
252 | return;
|
253 | }
|
254 |
|
255 | for (let i = this._currentPageNumber; i > 0; i--) {
|
256 | const destHash = pageNumberToDestHash.get(i);
|
257 |
|
258 | if (!destHash) {
|
259 | continue;
|
260 | }
|
261 |
|
262 | const linkElement = this.container.querySelector(`a[href="${destHash}"]`);
|
263 |
|
264 | if (!linkElement) {
|
265 | continue;
|
266 | }
|
267 |
|
268 | this._scrollToCurrentTreeItem(linkElement.parentNode);
|
269 |
|
270 | break;
|
271 | }
|
272 | }
|
273 |
|
274 | async _getPageNumberToDestHash(pdfDocument) {
|
275 | if (this._pageNumberToDestHashCapability) {
|
276 | return this._pageNumberToDestHashCapability.promise;
|
277 | }
|
278 |
|
279 | this._pageNumberToDestHashCapability = (0, _pdf.createPromiseCapability)();
|
280 | const pageNumberToDestHash = new Map(),
|
281 | pageNumberNesting = new Map();
|
282 | const queue = [{
|
283 | nesting: 0,
|
284 | items: this._outline
|
285 | }];
|
286 |
|
287 | while (queue.length > 0) {
|
288 | const levelData = queue.shift(),
|
289 | currentNesting = levelData.nesting;
|
290 |
|
291 | for (const {
|
292 | dest,
|
293 | items
|
294 | } of levelData.items) {
|
295 | let explicitDest, pageNumber;
|
296 |
|
297 | if (typeof dest === "string") {
|
298 | explicitDest = await pdfDocument.getDestination(dest);
|
299 |
|
300 | if (pdfDocument !== this._pdfDocument) {
|
301 | return null;
|
302 | }
|
303 | } else {
|
304 | explicitDest = dest;
|
305 | }
|
306 |
|
307 | if (Array.isArray(explicitDest)) {
|
308 | const [destRef] = explicitDest;
|
309 |
|
310 | if (typeof destRef === "object" && destRef !== null) {
|
311 | pageNumber = this.linkService._cachedPageNumber(destRef);
|
312 |
|
313 | if (!pageNumber) {
|
314 | try {
|
315 | pageNumber = (await pdfDocument.getPageIndex(destRef)) + 1;
|
316 |
|
317 | if (pdfDocument !== this._pdfDocument) {
|
318 | return null;
|
319 | }
|
320 |
|
321 | this.linkService.cachePageRef(pageNumber, destRef);
|
322 | } catch (ex) {}
|
323 | }
|
324 | } else if (Number.isInteger(destRef)) {
|
325 | pageNumber = destRef + 1;
|
326 | }
|
327 |
|
328 | if (Number.isInteger(pageNumber) && (!pageNumberToDestHash.has(pageNumber) || currentNesting > pageNumberNesting.get(pageNumber))) {
|
329 | const destHash = this.linkService.getDestinationHash(dest);
|
330 | pageNumberToDestHash.set(pageNumber, destHash);
|
331 | pageNumberNesting.set(pageNumber, currentNesting);
|
332 | }
|
333 | }
|
334 |
|
335 | if (items.length > 0) {
|
336 | queue.push({
|
337 | nesting: currentNesting + 1,
|
338 | items
|
339 | });
|
340 | }
|
341 | }
|
342 | }
|
343 |
|
344 | this._pageNumberToDestHashCapability.resolve(pageNumberToDestHash.size > 0 ? pageNumberToDestHash : null);
|
345 |
|
346 | return this._pageNumberToDestHashCapability.promise;
|
347 | }
|
348 |
|
349 | }
|
350 |
|
351 | exports.PDFOutlineViewer = PDFOutlineViewer; |
\ | No newline at end of file |