X-Git-Url: https://git.kianting.info/?a=blobdiff_plain;f=src%2Flibclo%2Findex.ts;h=bcd6a46704d96b05580f4f81eea3e86eef1b214e;hb=134485a6d637ce5b422098c08bccb274c73bca86;hp=7fd58c67868378a167ac574afca354868eaddaab;hpb=796e0c20c767e214b104fa3d17e754ce58da6e73;p=clo

diff --git a/src/libclo/index.ts b/src/libclo/index.ts
index 7fd58c6..bcd6a46 100644
--- a/src/libclo/index.ts
+++ b/src/libclo/index.ts
@@ -1,7 +1,14 @@
-import { isKeyObject, isStringObject } from "util/types";
+import { isBoxedPrimitive, isKeyObject, isStringObject } from "util/types";
 import {tkTree} from "../parser";
-import {TextStyle, FontStyle, TextWeight} from "../canva";
-import { isString } from "util";
+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
@@ -13,30 +20,59 @@ import { isString } from "util";
  * TTB - top to bottom
  * etc.
  */
-enum Direction{
+export enum Direction{
     LTR,
     RTL,
     TTB,
     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 : the distance between baselines in px
  */
-interface FrameBox extends Box{
+export interface FrameBox extends Box{
     directionInsideLine : Direction,
     baseLineskip : number | null,
 }
 
+export interface CharBox extends Box{
+    minX: number,
+    maxX: number,
+    minY: number,
+    maxY: number,
+
+}
+
 /**
  * a basic Box
+ * - x :
+ * - y : 
+ * - textStyle :
+ * - direction :
+ * - width : x_advance
+ * - content :
  */
-interface Box{
+export interface Box{
     x : number | null,
     y : number | null,
-    fontStyle : FontStyle | null,
+    textStyle : TextStyle | null,
     direction : Direction,
     width : number,
     height : number,
@@ -47,21 +83,21 @@ interface Box{
 /**
  * DEFAULT CONST PART
  */
-const A4_IN_PX = {"width" : 793.7,
+export const A4_IN_PX = {"width" : 793.7,
                   "height" : 1122.5};
 
-const defaultTextStyle : FontStyle = {
-        family : "FreeSans",
-        size : 12,
+export const defaultTextStyle : TextStyle = {
+        family : "FreeSerif",
+        size : ptToPx(12),
         textWeight : TextWeight.REGULAR,
-        textStyle : TextStyle.ITALIC,
+        fontStyle : FontStyle.ITALIC,
 }
 
-const defaultFrameStyle : FrameBox = {
+export const defaultFrameStyle : FrameBox = {
     directionInsideLine : Direction.LTR,
     direction : Direction.TTB,
     baseLineskip : ptToPx(15),
-    fontStyle : defaultTextStyle,
+    textStyle : defaultTextStyle,
     x : A4_IN_PX.width * 0.10,
     y : A4_IN_PX.height * 0.10,
     width : A4_IN_PX.width * 0.80,
@@ -69,9 +105,17 @@ const defaultFrameStyle : FrameBox = {
     content : null,
 };
 
-const cjkvBlocksInRegex = ["Hani"];
+/**
+ * definition for cjk scripts
+ *  - Hani : Han Character
+ *  - Hang : Hangul
+ *  - Bopo : Bopomofo
+ *  - Kana : Katakana
+ *  - Hira : Hiragana
+*/
+export const cjkvBlocksInRegex = ["Hani", "Hang", "Bopo", "Kana", "Hira"];
 
-const cjkvRegexPattern = new RegExp("((?:" +
+export const cjkvRegexPattern = new RegExp("((?:" +
     cjkvBlocksInRegex.map((x)=>"\\p{Script_Extensions="+x+"}").join("|") + ")+)", "gu");
 /**
  * FUNCTION PART
@@ -81,8 +125,8 @@ const cjkvRegexPattern = new RegExp("((?:" +
  * @param pt pt size value
  * @returns the corresponding px value
  */
-function ptToPx(pt : number) : number{
-    return pt * 4 / 3.0;
+export function ptToPx(pt : number) : number{
+    return pt * 4.0 / 3.0;
 }
 
 
@@ -91,19 +135,54 @@ function ptToPx(pt : number) : number{
  *  REGISTER PART
  */
 
+/**
+ * convert '\n\n' to newline command ["nl"]
+ * @param arr the input `tkTree`
+ * @param clo the `Clo` object
+ * @returns the input tktree
+ */
+export function twoReturnsToNewline(arr : tkTree, clo : Clo): tkTree{
+    var middle : tkTree = [];
+
+    for (let i = 0; i < arr.length; i++) {
+        var item = arr[i];
+        if (!Array.isArray(item)){
+            middle = middle.concat(item.split(/(\n\n)/g));
+        }
+        else{
+            middle.push(item);
+        }
+    }
+
+    var result : tkTree = [];
+    for (let j = 0; j < middle.length; j++){
+        var item = middle[j];
+        if (!Array.isArray(item) && item == "\n\n"){
+            result.push(["nl"]); // push a newline command to the result `tkTree`
+        }
+        else{
+            result.push(middle[j]);
+        }
+    }
+
+    return result;
+}
 
 /**
  * split CJKV and non-CJKV
  *
  * @param arr : input tkTree
- * @returns 
+ * @returns a splitted tkTree (by CJK and NonCJK)
+ * - Examples:
+ *  ```
+ *  [`many臺中daylight`] => [`many`, `臺中`, `dahylight`]
+ *  ```
  */ 
-function splitCJKV(arr : tkTree): tkTree{
+export function splitCJKV(arr : tkTree, clo : Clo): tkTree{
     var result : tkTree = [];
     for (let i = 0; i < arr.length; i++) {
         var item = arr[i];
         if (!Array.isArray(item)){
-            console.log(item.split(cjkvRegexPattern));
             result = result.concat(item.split(cjkvRegexPattern));
         }
         else{
@@ -114,30 +193,230 @@ function splitCJKV(arr : tkTree): tkTree{
     return result;
 }
 
+/**
+ * hyphenation for a clo document
+ * @param arr the array for a `tkTree`
+ * @param clo the Clo object
+ */
+export function hyphenForClo(arr : tkTree, clo : Clo): tkTree{
+    let hyphenLanguage : string = clo.attrs["hyphenLanguage"];
+    let res =  hyphenTkTree(arr, hyphenLanguage);
+    return res;
+
+}
+
+/**
+ * convert spaces to Breakpoint
+ * \s+ => ["bp" [\s+] ""]
+ * @param arr the tkTree input text stream
+ * @param clo the Clo object 
+ * @returns the converted object
+ */
+export function spacesToBreakpoint(arr : tkTree, clo : Clo) : tkTree{
+    let spacePattern = /^([ \t]+)$/g;
+    var result : tkTree = [];
+    for (let i = 0; i < arr.length; i++){
+        var item = arr[i];
+        if (!Array.isArray(item) && item.match(spacePattern)){
+            // push a breakpoint command to the result `tkTree`
+            result.push([ 'bp', [["hglue", "0.1"], item] , "" ]); 
+        }
+        else{
+            result.push(item);
+        }
+    }
+
+    return result;
+}
+
+/**
+ * remove all the `` (empty string) in the arr
+ * @param arr the tkTree to be filtered
+ * @param clo the Clo file 
+ */
+export function filterEmptyString(arr : tkTree, clo : Clo) : tkTree{
+    if (Array.isArray(arr)){
+        arr.filter((x)=>{return x != ``;});
+    }
+
+    return arr;
+}
+
+
+/**
+ * OTHER FUNCTIONS
+ */
+
+/**
+ * hyphenate for a tkTree
+ *  - hyphenation => ["bp", "", "-"]
+ * @param arr the tkTree array
+ * @param lang ISO 639 code for the language
+ */
+export function hyphenTkTree(arr : tkTree, lang: string) : tkTree{
+    // import corresponding hyphen language data and function
+    let hyphen = require("hyphen/"+lang);
+
+    let result :tkTree[] = [];
+    for (let i = 0; i < arr.length; i++) {
+        let element = arr[i];
+        let splitter = "分"; // a CJKV
+        if (!Array.isArray(element)){
+            let hyphenatedElement : string = hyphen.hyphenateSync(element, {hyphenChar :splitter});
+            let hyphenatedSplitted : tkTree = hyphenatedElement.split(splitter);
+            var newSplitted : tkTree = [];
+            for (var j=0; j<hyphenatedSplitted.length-1;j++){
+                newSplitted.push(hyphenatedSplitted[j]);
+                // "bp" for breakpoint
+                newSplitted.push(["bp", "", "-"]); //insert a breakable point (bp) mark
+            }
+            newSplitted.push(hyphenatedSplitted[hyphenatedSplitted.length-1]);
+
+            result = result.concat(newSplitted);
+
+        }else{
+            result.push(element);
+        }
+        
+    }
+
+    return result;
+}
+
+/**
+ * calculate the text width and Height with a given `TextStyle` 
+ * @param preprocessed 
+ * @param defaultFontStyle 
+ */
+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));
+    }
+
+    res = res.flat();
+
+    return res;
+}
+
+
+/**
+ * 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);
+    }
+}
+
+
+
+
+/**
+ * whole document-representing class
+ */
 export class Clo{
+    /** storing the text string into the main frame */
     mainStream : Array<string>;
+    /** array of preprocessor functions to preprocess the `mainStream` */
     preprocessors : Array<Function>;
-    attributes: {[index: string]:any} ; // a4 size(x,y)
+    /** the attributes for the Clo */
+    attrs: {[index: string]:any} ; // a4 size(x,y)
 
     
     constructor(){
         this.preprocessors = [];
         this.mainStream = [];
-        this.attributes = {"page" : A4_IN_PX};
+        this.attrs = {
+            "page" : A4_IN_PX, // default for a4. in px of [x, y]
+            "defaultFrameStyle" : defaultFrameStyle, // defaultFrameStyle
+            "hyphenLanguage" : 'en' // hyphenated in the language (in ISO 639)
+        };
 
         
 
         // register the precessor functions
         this.preprocessorRegister(splitCJKV);
+        this.preprocessorRegister(hyphenForClo);
+        this.preprocessorRegister(twoReturnsToNewline);
+        this.preprocessorRegister(spacesToBreakpoint);
+        this.preprocessorRegister(filterEmptyString);
     }
 
     public setAttr(attr : string, val : any):void{
-        Object.assign(this.attributes, attr, val);
+        Object.assign(this.attrs, attr, val);
     }
 
     public getAttr(attr:string) : any{
-        if (Object.keys(this.attributes).length === 0){
-            return this.attributes[attr];
+        if (Object.keys(this.attrs).length === 0){
+            return this.attrs[attr];
         }else{
             return undefined;
         }
@@ -152,18 +431,181 @@ export class Clo{
         this.preprocessors.push(f);
     }
 
-    public generatePdf(){
+    public async generatePdf(){
         // preprocessed
-        var prepro = this.mainStream;
+        var preprocessed = this.mainStream;
         for (var i = 0; i<this.preprocessors.length; i++){
-            prepro = this.preprocessors[i](prepro);
+            preprocessed = this.preprocessors[i](preprocessed, this);
         }
+        // generate the width and height of the stream
+
+        let defaultFontStyle : TextStyle = this.attrs["defaultFrameStyle"].textStyle;
+        let a = await calculateTextWidthHeight(preprocessed, defaultFontStyle);
+
+        let breakLineAlgorithms = new breakLines.BreakLineAlgorithm();
         // TODO
-        console.log("test"+prepro);
+        //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
+export default a; */
\ No newline at end of file