-import { isKeyObject, isStringObject } from "util/types";
+import { isBoxedPrimitive, isKeyObject, isStringObject } from "util/types";
import {tkTree} from "../parser";
-import {FontStyle, TextStyle, TextWeight} from "../canva";
+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";
/**
* 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
baseLineskip : number | null,
}
+export interface CharBox extends Box{
+ minX: number,
+ maxX: number,
+ minY: number,
+ maxY: number,
+
+}
+
/**
* a basic Box
* - x :
* - y :
* - textStyle :
* - direction :
- * - width :
+ * - width : x_advance
* - content :
*/
export interface Box{
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 function calculateTextWidthHeight(preprocessed : tkTree, style : TextStyle): void {
- var dom = new JSDOM(`<!DOCTYPE html><html><head></head>
- <body><canvas id="canvas"></canvas></body></html>`);
+export async function calculateTextWidthHeight(element : tkTree, style : TextStyle): Promise<BoxesItem[]> {
+ var res = [];
- try {
- let canvas = dom.window.document.getElementById("canvas");
- console.log(canvas);
-
- /*if (!(canvas instanceof HTMLElement)){
- throw new Error('the <canvas="canvas"> in the jsdom\'s DOM is not found.');
-
- }*/
-
- let context = (<HTMLCanvasElement>canvas).getContext("2d");
- console.log(context);
- if (context == null){
- throw new Error('`canvas.getContext("2d");` can\'t be executed.');
-
- }
+ for (var i=0; i<element.length; i++){
+ res.push(await calculateTextWidthHeightAux(element[i], style));
+ }
- context.font = `normal normal ${style.size}px ${style.family}`;
- console.log(context.font);
- let txt = `Hello john`;
- console.log(txt);
- let measured = context.measureText(txt);
- let width = measured.width;
- let height = measured.actualBoundingBoxAscent;
- let depth = measured.actualBoundingBoxDescent;
+ res = res.flat();
- console.log("width: "+width);
- console.log("height: "+height);
- console.log("depth: "+depth);
+ return res;
+}
- } catch (error) {
- console.log("Exception "+error);
- }
+/**
+ * calculate the text width and Height with a given `TextStyle`
+ * @param preprocessed
+ * @param defaultFontStyle
+ */
+export async function calculateTextWidthHeightAux(element : tkTree, style : TextStyle): Promise<BoxesItem> {
+ var result : BoxesItem = [];
+
+ let fontPair = fontStyleTofont(style);
+ if (fontPair.path.match(/\.ttc$/)){
+ var font = await fontkit.openSync(fontPair.path, fontPair.psName);
+ }
+ else{
+ var font = await fontkit.openSync(fontPair.path);
+ }
+ if (!Array.isArray(element)){
+ var run = font.layout(element, undefined, undefined, undefined, "ltr");
+
+
+
+ for (var j=0;j<run.glyphs.length;j++){
+ let runGlyphsItem = run.glyphs[j];
+
+
+ let item : CharBox = {
+ x : null,
+ y : null,
+ textStyle : style,
+ direction : Direction.LTR,
+ width : (runGlyphsItem.advanceWidth)*(style.size)/1000,
+ height : (runGlyphsItem.bbox.maxY - runGlyphsItem.bbox.minY)*(style.size)/1000,
+ content : element[j],
+ minX : runGlyphsItem.bbox.minX,
+ maxX : runGlyphsItem.bbox.maxX,
+ minY : runGlyphsItem.bbox.minY,
+ maxY : runGlyphsItem.bbox.maxY
+ }
+
+ result.push(item);
+
+ }
+ return result;
+
+
+
+
+ }else if(element[0] == "bp"){
+
+ 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();
+ }
+
+ 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);
// TODO
- console.log(preprocessed);
+ console.log(util.inspect(a, true, 100));
+ console.log(breakLines.totalCost(a,3,100));
}
projects / clo / blobdiff