import {FontStyle, TextStyle, TextWeight, fontStyleTofont} from "../canva";
import { JSDOM } from "jsdom";
import * as fontkit from "fontkit";
+import * as util from "node:util";
+import * as breakLines from "./breakLines";
+import "pdfkit";
+import PDFKitPage from "pdfkit/js/page";
+import { ColorTypes, PDFDocument, rgb } from "pdf-lib";
+import * as fs from "fs";
/**
* TYPES
BTT,
}
+/**
+ * Horizonal glue.
+ * - stretchFactor : the stretch factor in float
+ */
+export interface HGlue{
+ stretchFactor: number
+}
+
+export interface BreakPoint{
+ original : BoxesItem,
+ newLined : BoxesItem
+}
+
+export type BoxesItem = HGlue | Box | BreakPoint | BoxesItem[] ;
+
/**
* frame box is a subclass of box
* - directionInsideLine : text direction inside a line
for (let i = 0; i < arr.length; i++){
var item = arr[i];
if (!Array.isArray(item) && item.match(spacePattern)){
- result.push([ 'bp', item, "" ]); // push a newline command to the result `tkTree`
+ // push a breakpoint command to the result `tkTree`
+ result.push([ 'bp', [["hglue", "0.1"], item] , "" ]);
}
else{
result.push(item);
* @param preprocessed
* @param defaultFontStyle
*/
-export async function calculateTextWidthHeight(element : tkTree, style : TextStyle): Promise<any> {
+export async function calculateTextWidthHeight(element : tkTree, style : TextStyle): Promise<BoxesItem[]> {
var res = [];
for (var i=0; i<element.length; i++){
res.push(await calculateTextWidthHeightAux(element[i], style));
}
- console.log(res);
+ res = res.flat();
return res;
}
* @param preprocessed
* @param defaultFontStyle
*/
-export async function calculateTextWidthHeightAux(element : tkTree, style : TextStyle): Promise<any> {
- var result : any = [];
+export async function calculateTextWidthHeightAux(element : tkTree, style : TextStyle): Promise<BoxesItem> {
+ var result : BoxesItem = [];
}else if(element[0] == "bp"){
- let beforeNewLine = await calculateTextWidthHeightAux(element[1], style);
+
+ var beforeNewLine = await calculateTextWidthHeightAux(element[1], style);
+ if (Array.isArray(beforeNewLine)){
+ beforeNewLine = beforeNewLine.flat();
+ }
+
let afterNewLine = await calculateTextWidthHeightAux(element[2], style);
+ if (Array.isArray(afterNewLine)){
+ afterNewLine = afterNewLine.flat();
+ }
- return ["bp", beforeNewLine, afterNewLine];
- }else{
- return calculateTextWidthHeight(element[1], style);
+ let breakPointNode : BreakPoint = {
+ original : beforeNewLine,
+ newLined : afterNewLine,
+ }
+
+ return breakPointNode;
+ }else if(element[0] == "hglue" && !Array.isArray(element[1])){
+ let hGlue : HGlue = {stretchFactor : parseFloat(element[1])}
+ return hGlue;
+ }
+ else{
+ return calculateTextWidthHeight(element, style);
}
}
this.preprocessors.push(f);
}
- public generatePdf(){
+ public async generatePdf(){
// preprocessed
var preprocessed = this.mainStream;
for (var i = 0; i<this.preprocessors.length; i++){
// generate the width and height of the stream
let defaultFontStyle : TextStyle = this.attrs["defaultFrameStyle"].textStyle;
- calculateTextWidthHeight(preprocessed, defaultFontStyle);
+ let a = await calculateTextWidthHeight(preprocessed, defaultFontStyle);
+ let breakLineAlgorithms = new breakLines.BreakLineAlgorithm();
// TODO
- console.log(preprocessed);
+ //console.log(breakLineAlgorithms.totalCost(a,70));
+ let segmentedNodes = breakLineAlgorithms.segmentedNodes(a, 70);
+
+ console.log(
+ this.segmentedNodesToFrameBox(segmentedNodes, <FrameBox>this.attrs["defaultFrameStyle"]));
+
+ // generate pdf
+ const pdfDoc = await PDFDocument.create();
+ var page = pdfDoc.addPage();
+ page.drawText('You can create PDFs!');
+
+ for (var j = 0; j<1000; j+=5){
+ if (j %50 == 0){
+ page.drawText(i.toString(), {x: 50, y: j});
+ }
+
+ page.drawLine({
+ start: { x: 0, y: j },
+ end: { x: 1000, y: j },
+ thickness: 0.5,
+ color: rgb(0.75, 0.2, 0.2),
+ opacity: 0.20,
+ });
+ }
+
+ for (var i = 0; i<1000; i+=5){
+ if (i % 50 == 0){
+ page.drawText(i.toString(), {x: i, y: 50});
+ }
+ page.drawLine({
+ start: { x: i, y: 0 },
+ end: { x: i, y: 1000 },
+ thickness: 0.5,
+ color: rgb(0.75, 0.2, 0.2),
+ opacity: 0.20,
+ });
+ }
+ pdfDoc.save();
+
+ const pdfBytes = await pdfDoc.save();
+ fs.writeFileSync("blank.pdf", pdfBytes);
+ }
+
+ segmentedNodesToFrameBox(segmentedNodes : BoxesItem[][], frame : FrameBox) : Box{
+ let baseLineskip = frame.baseLineskip;
+ let boxArrayEmpty : Box[] = [];
+ let bigBox : Box = {
+ x : frame.x,
+ y : frame.y,
+ textStyle : frame.textStyle,
+ direction : frame.direction,
+ width : frame.width,
+ height : frame.height,
+ content : boxArrayEmpty,
+ }
+
+ var bigBoxContent : Box[] = boxArrayEmpty;
+
+ let segmentedNodesFixed = segmentedNodes.map((x)=>this.removeBreakPoints
+(x).flat());
+ let segmentedNodeUnglue = segmentedNodesFixed.map((x)=>this.removeGlue(x, frame).flat());
+
+ for (var i=0; i<segmentedNodesFixed.length-1; i++){
+ var currentLineSkip = baseLineskip;
+ var glyphMaxHeight = this.getGlyphMaxHeight(segmentedNodesFixed[i]);
+ if (currentLineSkip === null || glyphMaxHeight >currentLineSkip ){
+ currentLineSkip = glyphMaxHeight;
+ }
+
+ var currentLineBox : Box = {
+ x : null,
+ y : null,
+ textStyle : defaultTextStyle,
+ direction : frame.directionInsideLine,
+ width : frame.width,
+ height : currentLineSkip,
+ content : <Box[]>segmentedNodeUnglue[i],
+ }
+
+ bigBoxContent.push(currentLineBox);
+
+ }
+
+ bigBox.content = bigBoxContent;
+
+ return bigBox;
+ }
+
+ /**
+ * get the max height of the glyph`[a, b, c]`
+ * @param nodeLine the node line [a, b, c, ...]
+ * @returns
+ */
+ getGlyphMaxHeight(nodeLine : BoxesItem[]) : number{
+ let segmentedNodeLineHeight = nodeLine.map((x : BoxesItem)=>{if ("height" in x && x.height > 0.0){return x.height}else{return 0.0}});
+ let maxHeight = Math.max(...segmentedNodeLineHeight);
+ return maxHeight;
+ }
+
+ removeGlue(nodeLine : BoxesItem[], frame : FrameBox) : BoxesItem[]{
+ let breakLineAlgorithms = new breakLines.BreakLineAlgorithm();
+ let glueRemoved = nodeLine.filter((x)=>!breakLineAlgorithms.isHGlue(x));
+ let onlyGlue = nodeLine.filter((x)=>breakLineAlgorithms.isHGlue(x));
+ let sumStretchFactor = onlyGlue.map((x)=>{if("stretchFactor" in x){ return x.stretchFactor} else{return 0;}})
+ .reduce((acc, cur)=>acc+cur , 0);
+
+ let glueRemovedWidth = glueRemoved.map((x)=>{if("width" in x){ return x.width} else{return 0;}})
+ .reduce((acc, cur)=>acc+cur , 0);
+ let offset = frame.width - glueRemovedWidth;
+ var res = [];
+ for (var i=0; i<nodeLine.length; i++){
+ var ele = nodeLine[i];
+ if (breakLineAlgorithms.isHGlue(ele)){
+ let tmp : Box = {
+ x : null,
+ y : null,
+ textStyle : null,
+ direction : frame.directionInsideLine,
+ width : ele.stretchFactor / sumStretchFactor * offset,
+ height : 0,
+ content : "",
+
+ }
+
+ res.push(tmp);
+ }else{
+ res.push(ele);
+ }
+ }
+
+ return res;
+ }
+
+ /**
+ * remove breakpoints
+ * @param boxitemline boxitem in a line with a breakpoint
+ * @returns boxitemline with break points removed
+ */
+ removeBreakPoints(boxitemline : BoxesItem[]) : BoxesItem[]{
+ var res : BoxesItem[] = [];
+ let breakLineAlgorithms = new breakLines.BreakLineAlgorithm();
+
+ for (var i = 0; i<boxitemline.length; i++){
+ let ele = boxitemline[i];
+ if (breakLineAlgorithms.isBreakPoint(ele)){
+ if (i == boxitemline.length-1){
+ res.push(ele.newLined);
+ }else{
+ res.push(ele.original);
+ }
+ }else{
+ res.push(ele);
+ }
+ }
+
+ return res;
}
}
+
/*
export let a = new Clo();
export default a; */
\ No newline at end of file
projects / clo / blobdiff