pdfjs-dist
Version:
Generic build of Mozilla's PDF.js library.
296 lines (295 loc) • 9 kB
JavaScript
/**
* @licstart The following is the entire license notice for the
* JavaScript code in this page
*
* Copyright 2022 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.
*
* @licend The above is the entire license notice for the
* JavaScript code in this page
*/
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.addHTML = addHTML;
exports.checkDimensions = checkDimensions;
exports.flushHTML = flushHTML;
exports.getAvailableSpace = getAvailableSpace;
var _xfa_object = require("./xfa_object.js");
var _html_utils = require("./html_utils.js");
function createLine(node, children) {
return {
name: "div",
attributes: {
class: [node.layout === "lr-tb" ? "xfaLr" : "xfaRl"]
},
children
};
}
function flushHTML(node) {
if (!node[_xfa_object.$extra]) {
return null;
}
const attributes = node[_xfa_object.$extra].attributes;
const html = {
name: "div",
attributes,
children: node[_xfa_object.$extra].children
};
if (node[_xfa_object.$extra].failingNode) {
const htmlFromFailing = node[_xfa_object.$extra].failingNode[_xfa_object.$flushHTML]();
if (htmlFromFailing) {
if (node.layout.endsWith("-tb")) {
html.children.push(createLine(node, [htmlFromFailing]));
} else {
html.children.push(htmlFromFailing);
}
}
}
if (html.children.length === 0) {
return null;
}
return html;
}
function addHTML(node, html, bbox) {
const extra = node[_xfa_object.$extra];
const availableSpace = extra.availableSpace;
const [x, y, w, h] = bbox;
switch (node.layout) {
case "position":
{
extra.width = Math.max(extra.width, x + w);
extra.height = Math.max(extra.height, y + h);
extra.children.push(html);
break;
}
case "lr-tb":
case "rl-tb":
if (!extra.line || extra.attempt === 1) {
extra.line = createLine(node, []);
extra.children.push(extra.line);
extra.numberInLine = 0;
}
extra.numberInLine += 1;
extra.line.children.push(html);
if (extra.attempt === 0) {
extra.currentWidth += w;
extra.height = Math.max(extra.height, extra.prevHeight + h);
} else {
extra.currentWidth = w;
extra.prevHeight = extra.height;
extra.height += h;
extra.attempt = 0;
}
extra.width = Math.max(extra.width, extra.currentWidth);
break;
case "rl-row":
case "row":
{
extra.children.push(html);
extra.width += w;
extra.height = Math.max(extra.height, h);
const height = (0, _html_utils.measureToString)(extra.height);
for (const child of extra.children) {
child.attributes.style.height = height;
}
break;
}
case "table":
{
extra.width = Math.min(availableSpace.width, Math.max(extra.width, w));
extra.height += h;
extra.children.push(html);
break;
}
case "tb":
{
extra.width = Math.min(availableSpace.width, Math.max(extra.width, w));
extra.height += h;
extra.children.push(html);
break;
}
}
}
function getAvailableSpace(node) {
const availableSpace = node[_xfa_object.$extra].availableSpace;
const marginV = node.margin ? node.margin.topInset + node.margin.bottomInset : 0;
const marginH = node.margin ? node.margin.leftInset + node.margin.rightInset : 0;
switch (node.layout) {
case "lr-tb":
case "rl-tb":
if (node[_xfa_object.$extra].attempt === 0) {
return {
width: availableSpace.width - marginH - node[_xfa_object.$extra].currentWidth,
height: availableSpace.height - marginV - node[_xfa_object.$extra].prevHeight
};
}
return {
width: availableSpace.width - marginH,
height: availableSpace.height - marginV - node[_xfa_object.$extra].height
};
case "rl-row":
case "row":
const width = node[_xfa_object.$extra].columnWidths.slice(node[_xfa_object.$extra].currentColumn).reduce((a, x) => a + x);
return {
width,
height: availableSpace.height - marginH
};
case "table":
case "tb":
return {
width: availableSpace.width - marginH,
height: availableSpace.height - marginV - node[_xfa_object.$extra].height
};
case "position":
default:
return availableSpace;
}
}
function getTransformedBBox(node) {
let w = node.w === "" ? NaN : node.w;
let h = node.h === "" ? NaN : node.h;
let [centerX, centerY] = [0, 0];
switch (node.anchorType || "") {
case "bottomCenter":
[centerX, centerY] = [w / 2, h];
break;
case "bottomLeft":
[centerX, centerY] = [0, h];
break;
case "bottomRight":
[centerX, centerY] = [w, h];
break;
case "middleCenter":
[centerX, centerY] = [w / 2, h / 2];
break;
case "middleLeft":
[centerX, centerY] = [0, h / 2];
break;
case "middleRight":
[centerX, centerY] = [w, h / 2];
break;
case "topCenter":
[centerX, centerY] = [w / 2, 0];
break;
case "topRight":
[centerX, centerY] = [w, 0];
break;
}
let x, y;
switch (node.rotate || 0) {
case 0:
[x, y] = [-centerX, -centerY];
break;
case 90:
[x, y] = [-centerY, centerX];
[w, h] = [h, -w];
break;
case 180:
[x, y] = [centerX, centerY];
[w, h] = [-w, -h];
break;
case 270:
[x, y] = [centerY, -centerX];
[w, h] = [-h, w];
break;
}
return [node.x + x + Math.min(0, w), node.y + y + Math.min(0, h), Math.abs(w), Math.abs(h)];
}
function checkDimensions(node, space) {
if (node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].firstUnsplittable === null) {
return true;
}
if (node.w === 0 || node.h === 0) {
return true;
}
const ERROR = 2;
const parent = node[_xfa_object.$getSubformParent]();
const attempt = parent[_xfa_object.$extra] && parent[_xfa_object.$extra].attempt || 0;
const [, y, w, h] = getTransformedBBox(node);
switch (parent.layout) {
case "lr-tb":
case "rl-tb":
if (attempt === 0) {
if (!node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].noLayoutFailure) {
if (node.h !== "" && Math.round(h - space.height) > ERROR) {
return false;
}
if (node.w !== "") {
if (Math.round(w - space.width) <= ERROR) {
return true;
}
if (parent[_xfa_object.$extra].numberInLine === 0) {
return space.height > ERROR;
}
return false;
}
return space.width > ERROR;
}
if (node.w !== "") {
return Math.round(w - space.width) <= ERROR;
}
return space.width > ERROR;
}
if (node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].noLayoutFailure) {
return true;
}
if (node.h !== "" && Math.round(h - space.height) > ERROR) {
return false;
}
if (node.w === "" || Math.round(w - space.width) <= ERROR) {
return space.height > ERROR;
}
if (parent[_xfa_object.$isThereMoreWidth]()) {
return false;
}
return space.height > ERROR;
case "table":
case "tb":
if (node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].noLayoutFailure) {
return true;
}
if (node.h !== "" && !node[_xfa_object.$isSplittable]()) {
return Math.round(h - space.height) <= ERROR;
}
if (node.w === "" || Math.round(w - space.width) <= ERROR) {
return space.height > ERROR;
}
if (parent[_xfa_object.$isThereMoreWidth]()) {
return false;
}
return space.height > ERROR;
case "position":
if (node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].noLayoutFailure) {
return true;
}
if (node.h === "" || Math.round(h + y - space.height) <= ERROR) {
return true;
}
const area = node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].currentContentArea;
return h + y > area.h;
case "rl-row":
case "row":
if (node[_xfa_object.$getTemplateRoot]()[_xfa_object.$extra].noLayoutFailure) {
return true;
}
if (node.h !== "") {
return Math.round(h - space.height) <= ERROR;
}
return true;
default:
return true;
}
}