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index.js
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index.js
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"use strict";
const templates = require("./templates");
const DocUtils = require("docxtemplater").DocUtils;
const DOMParser = require("xmldom").DOMParser;
function isNaN(number) {
return !(number === number);
}
const ImgManager = require("./imgManager");
const moduleName = "open-xml-templating/docxtemplater-image-module";
function getInnerDocx({part}) {
return part;
}
function getInnerPptx({part, left, right, postparsed}) {
const xmlString = postparsed.slice(left + 1, right).reduce(function (concat, item) {
return concat + item.value;
}, "");
const xmlDoc = new DOMParser().parseFromString("<xml>" + xmlString + "</xml>");
part.offset = {x: 0, y: 0};
part.ext = {cx: 0, cy: 0};
const offset = xmlDoc.getElementsByTagName("a:off");
const ext = xmlDoc.getElementsByTagName("a:ext");
if (ext.length > 0) {
part.ext.cx = parseInt(ext[ext.length - 1].getAttribute("cx"), 10);
part.ext.cy = parseInt(ext[ext.length - 1].getAttribute("cy"), 10);
}
if (offset.length > 0) {
part.offset.x = parseInt(offset[offset.length - 1].getAttribute("x"), 10);
part.offset.y = parseInt(offset[offset.length - 1].getAttribute("y"), 10);
}
return part;
}
class ImageModule {
constructor(options) {
this.name = "ImageModule";
this.options = options || {};
this.imgManagers = {};
if (this.options.centered == null) { this.options.centered = false; }
if (this.options.getImage == null) { throw new Error("You should pass getImage"); }
if (this.options.getSize == null) { throw new Error("You should pass getSize"); }
this.imageNumber = 1;
}
optionsTransformer(options, docxtemplater) {
const relsFiles = docxtemplater.zip.file(/\.xml\.rels/)
.concat(docxtemplater.zip.file(/\[Content_Types\].xml/))
.map((file) => file.name);
this.fileTypeConfig = docxtemplater.fileTypeConfig;
this.fileType = docxtemplater.fileType;
this.zip = docxtemplater.zip;
options.xmlFileNames = options.xmlFileNames.concat(relsFiles);
return options;
}
set(options) {
if (options.zip) {
this.zip = options.zip;
}
if (options.xmlDocuments) {
this.xmlDocuments = options.xmlDocuments;
}
}
parse(placeHolderContent) {
const module = moduleName;
const type = "placeholder";
if (this.options.setParser) {
return this.options.setParser(placeHolderContent);
}
if (placeHolderContent.substring(0, 2) === "%%") {
return {type, value: placeHolderContent.substr(2), module, centered: true};
}
if (placeHolderContent.substring(0, 1) === "%") {
return {type, value: placeHolderContent.substr(1), module, centered: false};
}
return null;
}
postparse(parsed) {
let expandTo;
let getInner;
if (this.fileType === "pptx") {
expandTo = "p:sp";
getInner = getInnerPptx;
}
else {
expandTo = this.options.centered ? "w:p" : "w:t";
getInner = getInnerDocx;
}
return DocUtils.traits.expandToOne(parsed, {moduleName, getInner, expandTo});
}
render(part, options) {
if (!part.type === "placeholder" || part.module !== moduleName) {
return null;
}
const tagValue = options.scopeManager.getValue(part.value, {
part: part,
});
if (!tagValue) {
return {value: this.fileTypeConfig.tagTextXml};
}
else if (typeof tagValue === "object") {
return this.getRenderedPart(part, tagValue.rId, tagValue.sizePixel);
}
const imgManager = new ImgManager(this.zip, options.filePath, this.xmlDocuments, this.fileType);
const imgBuffer = this.options.getImage(tagValue, part.value);
const rId = imgManager.addImageRels(this.getNextImageName(), imgBuffer);
const sizePixel = this.options.getSize(imgBuffer, tagValue, part.value);
return this.getRenderedPart(part, rId, sizePixel);
}
resolve(part, options) {
const imgManager = new ImgManager(this.zip, options.filePath, this.xmlDocuments, this.fileType);
if (!part.type === "placeholder" || part.module !== moduleName) {
return null;
}
const value = options.scopeManager.getValue(part.value, {
part: part,
});
if (!value) {
return {value: this.fileTypeConfig.tagTextXml};
}
return new Promise((resolve) => {
const imgBuffer = this.options.getImage(value, part.value);
resolve(imgBuffer);
}).then((imgBuffer) => {
const rId = imgManager.addImageRels(this.getNextImageName(), imgBuffer);
return new Promise((resolve) => {
const sizePixel = this.options.getSize(imgBuffer, value, part.value);
resolve(sizePixel);
}).then((sizePixel) => {
return {
rId: rId,
sizePixel: sizePixel,
};
});
});
}
getRenderedPart(part, rId, sizePixel) {
if (isNaN(rId)) {
throw new Error("rId is NaN, aborting");
}
const size = [DocUtils.convertPixelsToEmus(sizePixel[0]), DocUtils.convertPixelsToEmus(sizePixel[1])];
const centered = (this.options.centered || part.centered);
let newText;
if (this.fileType === "pptx") {
newText = this.getRenderedPartPptx(part, rId, size, centered);
}
else {
newText = this.getRenderedPartDocx(rId, size, centered);
}
return {value: newText};
}
getRenderedPartPptx(part, rId, size, centered) {
const offset = {x: parseInt(part.offset.x, 10), y: parseInt(part.offset.y, 10)};
const cellCX = parseInt(part.ext.cx, 10) || 1;
const cellCY = parseInt(part.ext.cy, 10) || 1;
const imgW = parseInt(size[0], 10) || 1;
const imgH = parseInt(size[1], 10) || 1;
if (centered) {
offset.x = Math.round(offset.x + (cellCX / 2) - (imgW / 2));
offset.y = Math.round(offset.y + (cellCY / 2) - (imgH / 2));
}
return templates.getPptxImageXml(rId, [imgW, imgH], offset);
}
getRenderedPartDocx(rId, size, centered) {
return centered ? templates.getImageXmlCentered(rId, size) : templates.getImageXml(rId, size);
}
getNextImageName() {
const name = `image_generated_${this.imageNumber}.png`;
this.imageNumber++;
return name;
}
}
module.exports = ImageModule;