X-Git-Url: https://git.kianting.info/?a=blobdiff_plain;f=src%2Flibclo%2Findex.ts;h=bcd6a46704d96b05580f4f81eea3e86eef1b214e;hb=134485a6d637ce5b422098c08bccb274c73bca86;hp=bb884fae1260a5fed6209a6895b835091f3a4607;hpb=830387283a88441140be5a9ebd13f36551bd15c7;p=clo

diff --git a/src/libclo/index.ts b/src/libclo/index.ts
index bb884fa..bcd6a46 100644
--- a/src/libclo/index.ts
+++ b/src/libclo/index.ts
@@ -3,6 +3,12 @@ import {tkTree} from "../parser";
 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
@@ -21,6 +27,21 @@ export enum Direction{
     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
@@ -197,7 +218,8 @@ export function spacesToBreakpoint(arr : tkTree, clo : Clo) : tkTree{
     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);
@@ -266,14 +288,14 @@ export function hyphenTkTree(arr : tkTree, lang: string) : tkTree{
  * @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;
 }
@@ -284,8 +306,8 @@ export async function calculateTextWidthHeight(element : tkTree, style : TextSty
  * @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 = [];
     
 
 
@@ -328,12 +350,29 @@ export async function calculateTextWidthHeightAux(element : tkTree, style : Text
         
 
     }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);
     }
 }
 
@@ -392,7 +431,7 @@ export class Clo{
         this.preprocessors.push(f);
     }
 
-    public generatePdf(){
+    public async generatePdf(){
         // preprocessed
         var preprocessed = this.mainStream;
         for (var i = 0; i<this.preprocessors.length; i++){
@@ -401,15 +440,172 @@ export class Clo{
         // 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