/* 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.append(tmp);
|
|
fonts = document.createElement("div");
|
panel.append(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.append(td1);
|
const td2 = document.createElement("td");
|
td2.textContent = obj[entry].toString();
|
tr.append(td2);
|
moreInfo.append(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.append(select, name, " ", download, " ", logIt, moreInfo);
|
fonts.append(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.append(stepperChooser);
|
stepperDiv = document.createElement("div");
|
this.panel.append(stepperControls, 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.append(debug);
|
const b = document.createElement("option");
|
b.textContent = "Page " + (pageIndex + 1);
|
b.value = pageIndex;
|
stepperChooser.append(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.append(table);
|
table.cellSpacing = 0;
|
const headerRow = c("tr");
|
table.append(headerRow);
|
headerRow.append(
|
c("th", "Break"),
|
c("th", "Idx"),
|
c("th", "fn"),
|
c("th", "args")
|
);
|
panel.append(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.append(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.append(cbox);
|
line.append(breakCell, 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.append(c("td", glyph.originalCharCode));
|
fontCharRow.append(c("td", glyph.fontChar));
|
unicodeRow.append(c("td", glyph.unicode));
|
} else {
|
// null or number
|
const advanceEl = c("td", glyph);
|
advanceEl.classList.add("advance");
|
charCodeRow.append(advanceEl);
|
fontCharRow.append(c("td"));
|
unicodeRow.append(c("td"));
|
}
|
}
|
decArgs = c("td");
|
const table = c("table");
|
table.classList.add("showText");
|
decArgs.append(table);
|
table.append(charCodeRow, fontCharRow, unicodeRow);
|
} else if (fn === "restore" && this.indentLevel > 0) {
|
this.indentLevel--;
|
}
|
line.append(c("td", " ".repeat(this.indentLevel * 2) + fn));
|
if (fn === "save") {
|
this.indentLevel++;
|
}
|
|
if (decArgs instanceof HTMLElement) {
|
line.append(decArgs);
|
} else {
|
line.append(c("td", JSON.stringify(simplifyArgs(decArgs))));
|
}
|
}
|
if (operatorsToDisplay < operatorList.fnArray.length) {
|
const lastCell = c("td", "...");
|
lastCell.colspan = 4;
|
chunk.append(lastCell);
|
}
|
this.operatorListIdx = operatorList.fnArray.length;
|
this.table.append(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.append(title, 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.append(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.append(controls);
|
|
const panels = document.createElement("div");
|
panels.setAttribute("class", "panels");
|
ui.append(panels);
|
|
container.append(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.append(panelButton);
|
panels.append(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.append(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 };
|
