| /* Copyright 2012 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. |
| */ |
| |
| let opMap; |
| |
| const FontInspector = (function FontInspectorClosure() { |
| let fonts; |
| let active = false; |
| const fontAttribute = "data-font-name"; |
| function removeSelection() { |
| const divs = document.querySelectorAll(`span[${fontAttribute}]`); |
| for (const div of divs) { |
| div.className = ""; |
| } |
| } |
| function resetSelection() { |
| const divs = document.querySelectorAll(`span[${fontAttribute}]`); |
| for (const div of divs) { |
| div.className = "debuggerHideText"; |
| } |
| } |
| function selectFont(fontName, show) { |
| const divs = document.querySelectorAll( |
| `span[${fontAttribute}=${fontName}]` |
| ); |
| for (const div of divs) { |
| div.className = show ? "debuggerShowText" : "debuggerHideText"; |
| } |
| } |
| function textLayerClick(e) { |
| if ( |
| !e.target.dataset.fontName || |
| e.target.tagName.toUpperCase() !== "SPAN" |
| ) { |
| return; |
| } |
| const fontName = e.target.dataset.fontName; |
| const selects = document.getElementsByTagName("input"); |
| for (const select of selects) { |
| if (select.dataset.fontName !== fontName) { |
| continue; |
| } |
| select.checked = !select.checked; |
| selectFont(fontName, select.checked); |
| select.scrollIntoView(); |
| } |
| } |
| return { |
| // Properties/functions needed by PDFBug. |
| id: "FontInspector", |
| name: "Font Inspector", |
| panel: null, |
| manager: null, |
| init(pdfjsLib) { |
| const panel = this.panel; |
| const tmp = document.createElement("button"); |
| tmp.addEventListener("click", resetSelection); |
| tmp.textContent = "Refresh"; |
| panel.appendChild(tmp); |
| |
| fonts = document.createElement("div"); |
| panel.appendChild(fonts); |
| }, |
| cleanup() { |
| fonts.textContent = ""; |
| }, |
| enabled: false, |
| get active() { |
| return active; |
| }, |
| set active(value) { |
| active = value; |
| if (active) { |
| document.body.addEventListener("click", textLayerClick, true); |
| resetSelection(); |
| } else { |
| document.body.removeEventListener("click", textLayerClick, true); |
| removeSelection(); |
| } |
| }, |
| // FontInspector specific functions. |
| fontAdded(fontObj, url) { |
| function properties(obj, list) { |
| const moreInfo = document.createElement("table"); |
| for (const entry of list) { |
| const tr = document.createElement("tr"); |
| const td1 = document.createElement("td"); |
| td1.textContent = entry; |
| tr.appendChild(td1); |
| const td2 = document.createElement("td"); |
| td2.textContent = obj[entry].toString(); |
| tr.appendChild(td2); |
| moreInfo.appendChild(tr); |
| } |
| return moreInfo; |
| } |
| const moreInfo = properties(fontObj, ["name", "type"]); |
| const fontName = fontObj.loadedName; |
| const font = document.createElement("div"); |
| const name = document.createElement("span"); |
| name.textContent = fontName; |
| const download = document.createElement("a"); |
| if (url) { |
| url = /url\(['"]?([^)"']+)/.exec(url); |
| download.href = url[1]; |
| } else if (fontObj.data) { |
| download.href = URL.createObjectURL( |
| new Blob([fontObj.data], { type: fontObj.mimeType }) |
| ); |
| } |
| download.textContent = "Download"; |
| const logIt = document.createElement("a"); |
| logIt.href = ""; |
| logIt.textContent = "Log"; |
| logIt.addEventListener("click", function (event) { |
| event.preventDefault(); |
| console.log(fontObj); |
| }); |
| const select = document.createElement("input"); |
| select.setAttribute("type", "checkbox"); |
| select.dataset.fontName = fontName; |
| select.addEventListener("click", function () { |
| selectFont(fontName, select.checked); |
| }); |
| font.appendChild(select); |
| font.appendChild(name); |
| font.appendChild(document.createTextNode(" ")); |
| font.appendChild(download); |
| font.appendChild(document.createTextNode(" ")); |
| font.appendChild(logIt); |
| font.appendChild(moreInfo); |
| fonts.appendChild(font); |
| // Somewhat of a hack, should probably add a hook for when the text layer |
| // is done rendering. |
| setTimeout(() => { |
| if (this.active) { |
| resetSelection(); |
| } |
| }, 2000); |
| }, |
| }; |
| })(); |
| |
| // Manages all the page steppers. |
| const StepperManager = (function StepperManagerClosure() { |
| let steppers = []; |
| let stepperDiv = null; |
| let stepperControls = null; |
| let stepperChooser = null; |
| let breakPoints = Object.create(null); |
| return { |
| // Properties/functions needed by PDFBug. |
| id: "Stepper", |
| name: "Stepper", |
| panel: null, |
| manager: null, |
| init(pdfjsLib) { |
| const self = this; |
| stepperControls = document.createElement("div"); |
| stepperChooser = document.createElement("select"); |
| stepperChooser.addEventListener("change", function (event) { |
| self.selectStepper(this.value); |
| }); |
| stepperControls.appendChild(stepperChooser); |
| stepperDiv = document.createElement("div"); |
| this.panel.appendChild(stepperControls); |
| this.panel.appendChild(stepperDiv); |
| if (sessionStorage.getItem("pdfjsBreakPoints")) { |
| breakPoints = JSON.parse(sessionStorage.getItem("pdfjsBreakPoints")); |
| } |
| |
| opMap = Object.create(null); |
| for (const key in pdfjsLib.OPS) { |
| opMap[pdfjsLib.OPS[key]] = key; |
| } |
| }, |
| cleanup() { |
| stepperChooser.textContent = ""; |
| stepperDiv.textContent = ""; |
| steppers = []; |
| }, |
| enabled: false, |
| active: false, |
| // Stepper specific functions. |
| create(pageIndex) { |
| const debug = document.createElement("div"); |
| debug.id = "stepper" + pageIndex; |
| debug.hidden = true; |
| debug.className = "stepper"; |
| stepperDiv.appendChild(debug); |
| const b = document.createElement("option"); |
| b.textContent = "Page " + (pageIndex + 1); |
| b.value = pageIndex; |
| stepperChooser.appendChild(b); |
| const initBreakPoints = breakPoints[pageIndex] || []; |
| const stepper = new Stepper(debug, pageIndex, initBreakPoints); |
| steppers.push(stepper); |
| if (steppers.length === 1) { |
| this.selectStepper(pageIndex, false); |
| } |
| return stepper; |
| }, |
| selectStepper(pageIndex, selectPanel) { |
| pageIndex |= 0; |
| if (selectPanel) { |
| this.manager.selectPanel(this); |
| } |
| for (const stepper of steppers) { |
| stepper.panel.hidden = stepper.pageIndex !== pageIndex; |
| } |
| for (const option of stepperChooser.options) { |
| option.selected = (option.value | 0) === pageIndex; |
| } |
| }, |
| saveBreakPoints(pageIndex, bps) { |
| breakPoints[pageIndex] = bps; |
| sessionStorage.setItem("pdfjsBreakPoints", JSON.stringify(breakPoints)); |
| }, |
| }; |
| })(); |
| |
| // The stepper for each page's operatorList. |
| const Stepper = (function StepperClosure() { |
| // Shorter way to create element and optionally set textContent. |
| function c(tag, textContent) { |
| const d = document.createElement(tag); |
| if (textContent) { |
| d.textContent = textContent; |
| } |
| return d; |
| } |
| |
| function simplifyArgs(args) { |
| if (typeof args === "string") { |
| const MAX_STRING_LENGTH = 75; |
| return args.length <= MAX_STRING_LENGTH |
| ? args |
| : args.substring(0, MAX_STRING_LENGTH) + "..."; |
| } |
| if (typeof args !== "object" || args === null) { |
| return args; |
| } |
| if ("length" in args) { |
| // array |
| const MAX_ITEMS = 10, |
| simpleArgs = []; |
| let i, ii; |
| for (i = 0, ii = Math.min(MAX_ITEMS, args.length); i < ii; i++) { |
| simpleArgs.push(simplifyArgs(args[i])); |
| } |
| if (i < args.length) { |
| simpleArgs.push("..."); |
| } |
| return simpleArgs; |
| } |
| const simpleObj = {}; |
| for (const key in args) { |
| simpleObj[key] = simplifyArgs(args[key]); |
| } |
| return simpleObj; |
| } |
| |
| // eslint-disable-next-line no-shadow |
| class Stepper { |
| constructor(panel, pageIndex, initialBreakPoints) { |
| this.panel = panel; |
| this.breakPoint = 0; |
| this.nextBreakPoint = null; |
| this.pageIndex = pageIndex; |
| this.breakPoints = initialBreakPoints; |
| this.currentIdx = -1; |
| this.operatorListIdx = 0; |
| this.indentLevel = 0; |
| } |
| |
| init(operatorList) { |
| const panel = this.panel; |
| const content = c("div", "c=continue, s=step"); |
| const table = c("table"); |
| content.appendChild(table); |
| table.cellSpacing = 0; |
| const headerRow = c("tr"); |
| table.appendChild(headerRow); |
| headerRow.appendChild(c("th", "Break")); |
| headerRow.appendChild(c("th", "Idx")); |
| headerRow.appendChild(c("th", "fn")); |
| headerRow.appendChild(c("th", "args")); |
| panel.appendChild(content); |
| this.table = table; |
| this.updateOperatorList(operatorList); |
| } |
| |
| updateOperatorList(operatorList) { |
| const self = this; |
| |
| function cboxOnClick() { |
| const x = +this.dataset.idx; |
| if (this.checked) { |
| self.breakPoints.push(x); |
| } else { |
| self.breakPoints.splice(self.breakPoints.indexOf(x), 1); |
| } |
| StepperManager.saveBreakPoints(self.pageIndex, self.breakPoints); |
| } |
| |
| const MAX_OPERATORS_COUNT = 15000; |
| if (this.operatorListIdx > MAX_OPERATORS_COUNT) { |
| return; |
| } |
| |
| const chunk = document.createDocumentFragment(); |
| const operatorsToDisplay = Math.min( |
| MAX_OPERATORS_COUNT, |
| operatorList.fnArray.length |
| ); |
| for (let i = this.operatorListIdx; i < operatorsToDisplay; i++) { |
| const line = c("tr"); |
| line.className = "line"; |
| line.dataset.idx = i; |
| chunk.appendChild(line); |
| const checked = this.breakPoints.includes(i); |
| const args = operatorList.argsArray[i] || []; |
| |
| const breakCell = c("td"); |
| const cbox = c("input"); |
| cbox.type = "checkbox"; |
| cbox.className = "points"; |
| cbox.checked = checked; |
| cbox.dataset.idx = i; |
| cbox.onclick = cboxOnClick; |
| |
| breakCell.appendChild(cbox); |
| line.appendChild(breakCell); |
| line.appendChild(c("td", i.toString())); |
| const fn = opMap[operatorList.fnArray[i]]; |
| let decArgs = args; |
| if (fn === "showText") { |
| const glyphs = args[0]; |
| const charCodeRow = c("tr"); |
| const fontCharRow = c("tr"); |
| const unicodeRow = c("tr"); |
| for (const glyph of glyphs) { |
| if (typeof glyph === "object" && glyph !== null) { |
| charCodeRow.appendChild(c("td", glyph.originalCharCode)); |
| fontCharRow.appendChild(c("td", glyph.fontChar)); |
| unicodeRow.appendChild(c("td", glyph.unicode)); |
| } else { |
| // null or number |
| const advanceEl = c("td", glyph); |
| advanceEl.classList.add("advance"); |
| charCodeRow.appendChild(advanceEl); |
| fontCharRow.appendChild(c("td")); |
| unicodeRow.appendChild(c("td")); |
| } |
| } |
| decArgs = c("td"); |
| const table = c("table"); |
| table.classList.add("showText"); |
| decArgs.appendChild(table); |
| table.appendChild(charCodeRow); |
| table.appendChild(fontCharRow); |
| table.appendChild(unicodeRow); |
| } else if (fn === "restore") { |
| this.indentLevel--; |
| } |
| line.appendChild(c("td", " ".repeat(this.indentLevel * 2) + fn)); |
| if (fn === "save") { |
| this.indentLevel++; |
| } |
| |
| if (decArgs instanceof HTMLElement) { |
| line.appendChild(decArgs); |
| } else { |
| line.appendChild(c("td", JSON.stringify(simplifyArgs(decArgs)))); |
| } |
| } |
| if (operatorsToDisplay < operatorList.fnArray.length) { |
| const lastCell = c("td", "..."); |
| lastCell.colspan = 4; |
| chunk.appendChild(lastCell); |
| } |
| this.operatorListIdx = operatorList.fnArray.length; |
| this.table.appendChild(chunk); |
| } |
| |
| getNextBreakPoint() { |
| this.breakPoints.sort(function (a, b) { |
| return a - b; |
| }); |
| for (const breakPoint of this.breakPoints) { |
| if (breakPoint > this.currentIdx) { |
| return breakPoint; |
| } |
| } |
| return null; |
| } |
| |
| breakIt(idx, callback) { |
| StepperManager.selectStepper(this.pageIndex, true); |
| this.currentIdx = idx; |
| |
| const listener = evt => { |
| switch (evt.keyCode) { |
| case 83: // step |
| document.removeEventListener("keydown", listener); |
| this.nextBreakPoint = this.currentIdx + 1; |
| this.goTo(-1); |
| callback(); |
| break; |
| case 67: // continue |
| document.removeEventListener("keydown", listener); |
| this.nextBreakPoint = this.getNextBreakPoint(); |
| this.goTo(-1); |
| callback(); |
| break; |
| } |
| }; |
| document.addEventListener("keydown", listener); |
| this.goTo(idx); |
| } |
| |
| goTo(idx) { |
| const allRows = this.panel.getElementsByClassName("line"); |
| for (const row of allRows) { |
| if ((row.dataset.idx | 0) === idx) { |
| row.style.backgroundColor = "rgb(251,250,207)"; |
| row.scrollIntoView(); |
| } else { |
| row.style.backgroundColor = null; |
| } |
| } |
| } |
| } |
| return Stepper; |
| })(); |
| |
| const Stats = (function Stats() { |
| let stats = []; |
| function clear(node) { |
| node.textContent = ""; // Remove any `node` contents from the DOM. |
| } |
| function getStatIndex(pageNumber) { |
| for (const [i, stat] of stats.entries()) { |
| if (stat.pageNumber === pageNumber) { |
| return i; |
| } |
| } |
| return false; |
| } |
| return { |
| // Properties/functions needed by PDFBug. |
| id: "Stats", |
| name: "Stats", |
| panel: null, |
| manager: null, |
| init(pdfjsLib) {}, |
| enabled: false, |
| active: false, |
| // Stats specific functions. |
| add(pageNumber, stat) { |
| if (!stat) { |
| return; |
| } |
| const statsIndex = getStatIndex(pageNumber); |
| if (statsIndex !== false) { |
| stats[statsIndex].div.remove(); |
| stats.splice(statsIndex, 1); |
| } |
| const wrapper = document.createElement("div"); |
| wrapper.className = "stats"; |
| const title = document.createElement("div"); |
| title.className = "title"; |
| title.textContent = "Page: " + pageNumber; |
| const statsDiv = document.createElement("div"); |
| statsDiv.textContent = stat.toString(); |
| wrapper.appendChild(title); |
| wrapper.appendChild(statsDiv); |
| stats.push({ pageNumber, div: wrapper }); |
| stats.sort(function (a, b) { |
| return a.pageNumber - b.pageNumber; |
| }); |
| clear(this.panel); |
| for (const entry of stats) { |
| this.panel.appendChild(entry.div); |
| } |
| }, |
| cleanup() { |
| stats = []; |
| clear(this.panel); |
| }, |
| }; |
| })(); |
| |
| // Manages all the debugging tools. |
| const PDFBug = (function PDFBugClosure() { |
| const panelWidth = 300; |
| const buttons = []; |
| let activePanel = null; |
| |
| return { |
| tools: [FontInspector, StepperManager, Stats], |
| enable(ids) { |
| const all = ids.length === 1 && ids[0] === "all"; |
| const tools = this.tools; |
| for (const tool of tools) { |
| if (all || ids.includes(tool.id)) { |
| tool.enabled = true; |
| } |
| } |
| if (!all) { |
| // Sort the tools by the order they are enabled. |
| tools.sort(function (a, b) { |
| let indexA = ids.indexOf(a.id); |
| indexA = indexA < 0 ? tools.length : indexA; |
| let indexB = ids.indexOf(b.id); |
| indexB = indexB < 0 ? tools.length : indexB; |
| return indexA - indexB; |
| }); |
| } |
| }, |
| init(pdfjsLib, container, ids) { |
| this.loadCSS(); |
| this.enable(ids); |
| /* |
| * Basic Layout: |
| * PDFBug |
| * Controls |
| * Panels |
| * Panel |
| * Panel |
| * ... |
| */ |
| const ui = document.createElement("div"); |
| ui.id = "PDFBug"; |
| |
| const controls = document.createElement("div"); |
| controls.setAttribute("class", "controls"); |
| ui.appendChild(controls); |
| |
| const panels = document.createElement("div"); |
| panels.setAttribute("class", "panels"); |
| ui.appendChild(panels); |
| |
| container.appendChild(ui); |
| container.style.right = panelWidth + "px"; |
| |
| // Initialize all the debugging tools. |
| for (const tool of this.tools) { |
| const panel = document.createElement("div"); |
| const panelButton = document.createElement("button"); |
| panelButton.textContent = tool.name; |
| panelButton.addEventListener("click", event => { |
| event.preventDefault(); |
| this.selectPanel(tool); |
| }); |
| controls.appendChild(panelButton); |
| panels.appendChild(panel); |
| tool.panel = panel; |
| tool.manager = this; |
| if (tool.enabled) { |
| tool.init(pdfjsLib); |
| } else { |
| panel.textContent = |
| `${tool.name} is disabled. To enable add "${tool.id}" to ` + |
| "the pdfBug parameter and refresh (separate multiple by commas)."; |
| } |
| buttons.push(panelButton); |
| } |
| this.selectPanel(0); |
| }, |
| loadCSS() { |
| const { url } = import.meta; |
| |
| const link = document.createElement("link"); |
| link.rel = "stylesheet"; |
| link.href = url.replace(/.js$/, ".css"); |
| |
| document.head.appendChild(link); |
| }, |
| cleanup() { |
| for (const tool of this.tools) { |
| if (tool.enabled) { |
| tool.cleanup(); |
| } |
| } |
| }, |
| selectPanel(index) { |
| if (typeof index !== "number") { |
| index = this.tools.indexOf(index); |
| } |
| if (index === activePanel) { |
| return; |
| } |
| activePanel = index; |
| for (const [j, tool] of this.tools.entries()) { |
| const isActive = j === index; |
| buttons[j].classList.toggle("active", isActive); |
| tool.active = isActive; |
| tool.panel.hidden = !isActive; |
| } |
| }, |
| }; |
| })(); |
| |
| globalThis.FontInspector = FontInspector; |
| globalThis.StepperManager = StepperManager; |
| globalThis.Stats = Stats; |
| |
| export { PDFBug }; |