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/* Copyright 2012 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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|
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const { OPS } = globalThis.pdfjsLib || (await import("pdfjs-lib")); |
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|
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const opMap = Object.create(null); |
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for (const key in OPS) { |
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opMap[OPS[key]] = key; |
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} |
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|
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const FontInspector = (function FontInspectorClosure() { |
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let fonts; |
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let active = false; |
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const fontAttribute = "data-font-name"; |
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function removeSelection() { |
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const divs = document.querySelectorAll(`span[${fontAttribute}]`); |
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for (const div of divs) { |
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div.className = ""; |
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} |
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} |
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function resetSelection() { |
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const divs = document.querySelectorAll(`span[${fontAttribute}]`); |
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for (const div of divs) { |
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div.className = "debuggerHideText"; |
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} |
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} |
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function selectFont(fontName, show) { |
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const divs = document.querySelectorAll( |
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`span[${fontAttribute}=${fontName}]` |
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); |
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for (const div of divs) { |
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div.className = show ? "debuggerShowText" : "debuggerHideText"; |
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} |
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} |
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function textLayerClick(e) { |
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if ( |
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!e.target.dataset.fontName || |
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e.target.tagName.toUpperCase() !== "SPAN" |
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) { |
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return; |
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} |
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const fontName = e.target.dataset.fontName; |
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const selects = document.getElementsByTagName("input"); |
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for (const select of selects) { |
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if (select.dataset.fontName !== fontName) { |
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continue; |
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} |
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select.checked = !select.checked; |
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selectFont(fontName, select.checked); |
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select.scrollIntoView(); |
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} |
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} |
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return { |
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// Properties/functions needed by PDFBug. |
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id: "FontInspector", |
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name: "Font Inspector", |
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panel: null, |
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manager: null, |
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init() { |
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const panel = this.panel; |
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const tmp = document.createElement("button"); |
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tmp.addEventListener("click", resetSelection); |
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tmp.textContent = "Refresh"; |
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panel.append(tmp); |
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|
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fonts = document.createElement("div"); |
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panel.append(fonts); |
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}, |
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cleanup() { |
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fonts.textContent = ""; |
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}, |
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enabled: false, |
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get active() { |
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return active; |
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}, |
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set active(value) { |
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active = value; |
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if (active) { |
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document.body.addEventListener("click", textLayerClick, true); |
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resetSelection(); |
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} else { |
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document.body.removeEventListener("click", textLayerClick, true); |
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removeSelection(); |
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} |
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}, |
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// FontInspector specific functions. |
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fontAdded(fontObj, url) { |
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function properties(obj, list) { |
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const moreInfo = document.createElement("table"); |
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for (const entry of list) { |
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const tr = document.createElement("tr"); |
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const td1 = document.createElement("td"); |
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td1.textContent = entry; |
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tr.append(td1); |
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const td2 = document.createElement("td"); |
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td2.textContent = obj[entry].toString(); |
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tr.append(td2); |
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moreInfo.append(tr); |
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} |
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return moreInfo; |
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} |
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|
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const moreInfo = fontObj.css |
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? properties(fontObj, ["baseFontName"]) |
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: properties(fontObj, ["name", "type"]); |
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|
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const fontName = fontObj.loadedName; |
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const font = document.createElement("div"); |
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const name = document.createElement("span"); |
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name.textContent = fontName; |
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let download; |
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if (!fontObj.css) { |
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download = document.createElement("a"); |
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if (url) { |
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url = /url\(['"]?([^)"']+)/.exec(url); |
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download.href = url[1]; |
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} else if (fontObj.data) { |
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download.href = URL.createObjectURL( |
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new Blob([fontObj.data], { type: fontObj.mimetype }) |
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); |
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} |
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download.textContent = "Download"; |
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} |
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|
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const logIt = document.createElement("a"); |
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logIt.href = ""; |
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logIt.textContent = "Log"; |
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logIt.addEventListener("click", function (event) { |
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event.preventDefault(); |
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console.log(fontObj); |
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}); |
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const select = document.createElement("input"); |
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select.setAttribute("type", "checkbox"); |
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select.dataset.fontName = fontName; |
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select.addEventListener("click", function () { |
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selectFont(fontName, select.checked); |
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}); |
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if (download) { |
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font.append(select, name, " ", download, " ", logIt, moreInfo); |
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} else { |
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font.append(select, name, " ", logIt, moreInfo); |
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} |
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fonts.append(font); |
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// Somewhat of a hack, should probably add a hook for when the text layer |
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// is done rendering. |
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setTimeout(() => { |
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if (this.active) { |
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resetSelection(); |
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} |
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}, 2000); |
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}, |
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}; |
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})(); |
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|
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// Manages all the page steppers. |
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const StepperManager = (function StepperManagerClosure() { |
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let steppers = []; |
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let stepperDiv = null; |
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let stepperControls = null; |
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let stepperChooser = null; |
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let breakPoints = Object.create(null); |
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return { |
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// Properties/functions needed by PDFBug. |
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id: "Stepper", |
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name: "Stepper", |
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panel: null, |
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manager: null, |
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init() { |
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const self = this; |
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stepperControls = document.createElement("div"); |
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stepperChooser = document.createElement("select"); |
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stepperChooser.addEventListener("change", function (event) { |
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self.selectStepper(this.value); |
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}); |
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stepperControls.append(stepperChooser); |
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stepperDiv = document.createElement("div"); |
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this.panel.append(stepperControls, stepperDiv); |
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if (sessionStorage.getItem("pdfjsBreakPoints")) { |
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breakPoints = JSON.parse(sessionStorage.getItem("pdfjsBreakPoints")); |
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} |
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}, |
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cleanup() { |
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stepperChooser.textContent = ""; |
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stepperDiv.textContent = ""; |
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steppers = []; |
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}, |
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enabled: false, |
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active: false, |
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// Stepper specific functions. |
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create(pageIndex) { |
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const debug = document.createElement("div"); |
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debug.id = "stepper" + pageIndex; |
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debug.hidden = true; |
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debug.className = "stepper"; |
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stepperDiv.append(debug); |
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const b = document.createElement("option"); |
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b.textContent = "Page " + (pageIndex + 1); |
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b.value = pageIndex; |
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stepperChooser.append(b); |
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const initBreakPoints = breakPoints[pageIndex] || []; |
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const stepper = new Stepper(debug, pageIndex, initBreakPoints); |
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steppers.push(stepper); |
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if (steppers.length === 1) { |
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this.selectStepper(pageIndex, false); |
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} |
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return stepper; |
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}, |
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selectStepper(pageIndex, selectPanel) { |
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pageIndex |= 0; |
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if (selectPanel) { |
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this.manager.selectPanel(this); |
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} |
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for (const stepper of steppers) { |
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stepper.panel.hidden = stepper.pageIndex !== pageIndex; |
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} |
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for (const option of stepperChooser.options) { |
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option.selected = (option.value | 0) === pageIndex; |
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} |
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}, |
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saveBreakPoints(pageIndex, bps) { |
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breakPoints[pageIndex] = bps; |
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sessionStorage.setItem("pdfjsBreakPoints", JSON.stringify(breakPoints)); |
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}, |
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}; |
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})(); |
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|
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// The stepper for each page's operatorList. |
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class Stepper { |
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// Shorter way to create element and optionally set textContent. |
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#c(tag, textContent) { |
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const d = document.createElement(tag); |
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if (textContent) { |
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d.textContent = textContent; |
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} |
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return d; |
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} |
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|
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#simplifyArgs(args) { |
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if (typeof args === "string") { |
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const MAX_STRING_LENGTH = 75; |
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return args.length <= MAX_STRING_LENGTH |
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? args |
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: args.substring(0, MAX_STRING_LENGTH) + "..."; |
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} |
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if (typeof args !== "object" || args === null) { |
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return args; |
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} |
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if ("length" in args) { |
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// array |
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const MAX_ITEMS = 10, |
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simpleArgs = []; |
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let i, ii; |
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for (i = 0, ii = Math.min(MAX_ITEMS, args.length); i < ii; i++) { |
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simpleArgs.push(this.#simplifyArgs(args[i])); |
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} |
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if (i < args.length) { |
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simpleArgs.push("..."); |
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} |
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return simpleArgs; |
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} |
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const simpleObj = {}; |
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for (const key in args) { |
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simpleObj[key] = this.#simplifyArgs(args[key]); |
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} |
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return simpleObj; |
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} |
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|
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constructor(panel, pageIndex, initialBreakPoints) { |
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this.panel = panel; |
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this.breakPoint = 0; |
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this.nextBreakPoint = null; |
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this.pageIndex = pageIndex; |
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this.breakPoints = initialBreakPoints; |
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this.currentIdx = -1; |
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this.operatorListIdx = 0; |
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this.indentLevel = 0; |
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} |
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|
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init(operatorList) { |
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const panel = this.panel; |
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const content = this.#c("div", "c=continue, s=step"); |
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const table = this.#c("table"); |
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content.append(table); |
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table.cellSpacing = 0; |
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const headerRow = this.#c("tr"); |
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table.append(headerRow); |
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headerRow.append( |
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this.#c("th", "Break"), |
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this.#c("th", "Idx"), |
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this.#c("th", "fn"), |
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this.#c("th", "args") |
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); |
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panel.append(content); |
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this.table = table; |
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this.updateOperatorList(operatorList); |
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} |
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|
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updateOperatorList(operatorList) { |
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const self = this; |
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|
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function cboxOnClick() { |
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const x = +this.dataset.idx; |
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if (this.checked) { |
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self.breakPoints.push(x); |
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} else { |
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self.breakPoints.splice(self.breakPoints.indexOf(x), 1); |
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} |
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StepperManager.saveBreakPoints(self.pageIndex, self.breakPoints); |
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} |
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|
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const MAX_OPERATORS_COUNT = 15000; |
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if (this.operatorListIdx > MAX_OPERATORS_COUNT) { |
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return; |
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} |
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|
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const chunk = document.createDocumentFragment(); |
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const operatorsToDisplay = Math.min( |
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MAX_OPERATORS_COUNT, |
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operatorList.fnArray.length |
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); |
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for (let i = this.operatorListIdx; i < operatorsToDisplay; i++) { |
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const line = this.#c("tr"); |
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line.className = "line"; |
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line.dataset.idx = i; |
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chunk.append(line); |
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const checked = this.breakPoints.includes(i); |
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const args = operatorList.argsArray[i] || []; |
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|
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const breakCell = this.#c("td"); |
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const cbox = this.#c("input"); |
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cbox.type = "checkbox"; |
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cbox.className = "points"; |
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cbox.checked = checked; |
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cbox.dataset.idx = i; |
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cbox.onclick = cboxOnClick; |
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|
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breakCell.append(cbox); |
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line.append(breakCell, this.#c("td", i.toString())); |
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const fn = opMap[operatorList.fnArray[i]]; |
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let decArgs = args; |
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if (fn === "showText") { |
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const glyphs = args[0]; |
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const charCodeRow = this.#c("tr"); |
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const fontCharRow = this.#c("tr"); |
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const unicodeRow = this.#c("tr"); |
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for (const glyph of glyphs) { |
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if (typeof glyph === "object" && glyph !== null) { |
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charCodeRow.append(this.#c("td", glyph.originalCharCode)); |
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fontCharRow.append(this.#c("td", glyph.fontChar)); |
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unicodeRow.append(this.#c("td", glyph.unicode)); |
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} else { |
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// null or number |
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const advanceEl = this.#c("td", glyph); |
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advanceEl.classList.add("advance"); |
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charCodeRow.append(advanceEl); |
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fontCharRow.append(this.#c("td")); |
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unicodeRow.append(this.#c("td")); |
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} |
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} |
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decArgs = this.#c("td"); |
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const table = this.#c("table"); |
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table.classList.add("showText"); |
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decArgs.append(table); |
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table.append(charCodeRow, fontCharRow, unicodeRow); |
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} else if (fn === "constructPath") { |
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const [op, [path], minMax] = args; |
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decArgs = this.#c("td"); |
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decArgs.append(JSON.stringify(this.#simplifyArgs(path))); |
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decArgs.append(this.#c("br")); |
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decArgs.append(`minMax: ${JSON.stringify(this.#simplifyArgs(minMax))}`); |
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decArgs.append(this.#c("br")); |
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decArgs.append(`→ ${opMap[op]}`); |
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} else if (fn === "restore" && this.indentLevel > 0) { |
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this.indentLevel--; |
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} |
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line.append(this.#c("td", " ".repeat(this.indentLevel * 2) + fn)); |
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if (fn === "save") { |
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this.indentLevel++; |
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} |
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|
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if (decArgs instanceof HTMLElement) { |
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line.append(decArgs); |
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} else { |
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line.append(this.#c("td", JSON.stringify(this.#simplifyArgs(decArgs)))); |
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} |
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} |
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if (operatorsToDisplay < operatorList.fnArray.length) { |
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const lastCell = this.#c("td", "..."); |
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lastCell.colspan = 4; |
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chunk.append(lastCell); |
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} |
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this.operatorListIdx = operatorList.fnArray.length; |
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this.table.append(chunk); |
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} |
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|
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getNextBreakPoint() { |
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this.breakPoints.sort((a, b) => a - b); |
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for (const breakPoint of this.breakPoints) { |
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if (breakPoint > this.currentIdx) { |
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return breakPoint; |
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} |
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} |
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return null; |
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} |
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|
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breakIt(idx, callback) { |
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StepperManager.selectStepper(this.pageIndex, true); |
| 420 |
this.currentIdx = idx; |
| 421 |
|
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const listener = evt => { |
| 423 |
switch (evt.keyCode) { |
| 424 |
case 83: // step |
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document.removeEventListener("keydown", listener); |
| 426 |
this.nextBreakPoint = this.currentIdx + 1; |
| 427 |
this.goTo(-1); |
| 428 |
callback(); |
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break; |
| 430 |
case 67: // continue |
| 431 |
document.removeEventListener("keydown", listener); |
| 432 |
this.nextBreakPoint = this.getNextBreakPoint(); |
| 433 |
this.goTo(-1); |
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callback(); |
| 435 |
break; |
| 436 |
} |
| 437 |
}; |
| 438 |
document.addEventListener("keydown", listener); |
| 439 |
this.goTo(idx); |
| 440 |
} |
| 441 |
|
| 442 |
goTo(idx) { |
| 443 |
const allRows = this.panel.getElementsByClassName("line"); |
| 444 |
for (const row of allRows) { |
| 445 |
if ((row.dataset.idx | 0) === idx) { |
| 446 |
row.style.backgroundColor = "rgb(251,250,207)"; |
| 447 |
row.scrollIntoView(); |
| 448 |
} else { |
| 449 |
row.style.backgroundColor = null; |
| 450 |
} |
| 451 |
} |
| 452 |
} |
| 453 |
} |
| 454 |
|
| 455 |
const Stats = (function Stats() { |
| 456 |
let stats = []; |
| 457 |
function clear(node) { |
| 458 |
node.textContent = ""; // Remove any `node` contents from the DOM. |
| 459 |
} |
| 460 |
function getStatIndex(pageNumber) { |
| 461 |
for (const [i, stat] of stats.entries()) { |
| 462 |
if (stat.pageNumber === pageNumber) { |
| 463 |
return i; |
| 464 |
} |
| 465 |
} |
| 466 |
return false; |
| 467 |
} |
| 468 |
return { |
| 469 |
// Properties/functions needed by PDFBug. |
| 470 |
id: "Stats", |
| 471 |
name: "Stats", |
| 472 |
panel: null, |
| 473 |
manager: null, |
| 474 |
init() {}, |
| 475 |
enabled: false, |
| 476 |
active: false, |
| 477 |
// Stats specific functions. |
| 478 |
add(pageNumber, stat) { |
| 479 |
if (!stat) { |
| 480 |
return; |
| 481 |
} |
| 482 |
const statsIndex = getStatIndex(pageNumber); |
| 483 |
if (statsIndex !== false) { |
| 484 |
stats[statsIndex].div.remove(); |
| 485 |
stats.splice(statsIndex, 1); |
| 486 |
} |
| 487 |
const wrapper = document.createElement("div"); |
| 488 |
wrapper.className = "stats"; |
| 489 |
const title = document.createElement("div"); |
| 490 |
title.className = "title"; |
| 491 |
title.textContent = "Page: " + pageNumber; |
| 492 |
const statsDiv = document.createElement("div"); |
| 493 |
statsDiv.textContent = stat.toString(); |
| 494 |
wrapper.append(title, statsDiv); |
| 495 |
stats.push({ pageNumber, div: wrapper }); |
| 496 |
stats.sort((a, b) => a.pageNumber - b.pageNumber); |
| 497 |
clear(this.panel); |
| 498 |
for (const entry of stats) { |
| 499 |
this.panel.append(entry.div); |
| 500 |
} |
| 501 |
}, |
| 502 |
cleanup() { |
| 503 |
stats = []; |
| 504 |
clear(this.panel); |
| 505 |
}, |
| 506 |
}; |
| 507 |
})(); |
| 508 |
|
| 509 |
// Manages all the debugging tools. |
| 510 |
class PDFBug { |
| 511 |
static #buttons = []; |
| 512 |
|
| 513 |
static #activePanel = null; |
| 514 |
|
| 515 |
static tools = [FontInspector, StepperManager, Stats]; |
| 516 |
|
| 517 |
static enable(ids) { |
| 518 |
const all = ids.length === 1 && ids[0] === "all"; |
| 519 |
const tools = this.tools; |
| 520 |
for (const tool of tools) { |
| 521 |
if (all || ids.includes(tool.id)) { |
| 522 |
tool.enabled = true; |
| 523 |
} |
| 524 |
} |
| 525 |
if (!all) { |
| 526 |
// Sort the tools by the order they are enabled. |
| 527 |
tools.sort(function (a, b) { |
| 528 |
let indexA = ids.indexOf(a.id); |
| 529 |
indexA = indexA < 0 ? tools.length : indexA; |
| 530 |
let indexB = ids.indexOf(b.id); |
| 531 |
indexB = indexB < 0 ? tools.length : indexB; |
| 532 |
return indexA - indexB; |
| 533 |
}); |
| 534 |
} |
| 535 |
} |
| 536 |
|
| 537 |
static init(container, ids) { |
| 538 |
this.loadCSS(); |
| 539 |
this.enable(ids); |
| 540 |
/* |
| 541 |
* Basic Layout: |
| 542 |
* PDFBug |
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* Controls |
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* Panels |
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* Panel |
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* Panel |
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* ... |
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*/ |
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const ui = document.createElement("div"); |
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ui.id = "PDFBug"; |
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|
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const controls = document.createElement("div"); |
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controls.setAttribute("class", "controls"); |
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ui.append(controls); |
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|
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const panels = document.createElement("div"); |
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panels.setAttribute("class", "panels"); |
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ui.append(panels); |
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|
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container.append(ui); |
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container.style.right = "var(--panel-width)"; |
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|
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// Initialize all the debugging tools. |
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for (const tool of this.tools) { |
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const panel = document.createElement("div"); |
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const panelButton = document.createElement("button"); |
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panelButton.textContent = tool.name; |
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panelButton.addEventListener("click", event => { |
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event.preventDefault(); |
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this.selectPanel(tool); |
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}); |
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controls.append(panelButton); |
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panels.append(panel); |
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tool.panel = panel; |
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tool.manager = this; |
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if (tool.enabled) { |
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tool.init(); |
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} else { |
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panel.textContent = |
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`${tool.name} is disabled. To enable add "${tool.id}" to ` + |
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"the pdfBug parameter and refresh (separate multiple by commas)."; |
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} |
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this.#buttons.push(panelButton); |
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} |
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this.selectPanel(0); |
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} |
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|
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static loadCSS() { |
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const { url } = import.meta; |
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|
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const link = document.createElement("link"); |
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link.rel = "stylesheet"; |
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link.href = url.replace(/\.js$/, ".css"); |
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|
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document.head.append(link); |
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} |
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|
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static cleanup() { |
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for (const tool of this.tools) { |
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if (tool.enabled) { |
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tool.cleanup(); |
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} |
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} |
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} |
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|
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static selectPanel(index) { |
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if (typeof index !== "number") { |
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index = this.tools.indexOf(index); |
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} |
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if (index === this.#activePanel) { |
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return; |
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} |
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this.#activePanel = index; |
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for (const [j, tool] of this.tools.entries()) { |
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const isActive = j === index; |
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this.#buttons[j].classList.toggle("active", isActive); |
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tool.active = isActive; |
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tool.panel.hidden = !isActive; |
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} |
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} |
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} |
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|
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globalThis.FontInspector = FontInspector; |
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globalThis.StepperManager = StepperManager; |
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globalThis.Stats = Stats; |
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|
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export { PDFBug }; |
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|
