X-Git-Url: https://git.kianting.info/?a=blobdiff_plain;f=src%2Flibclo%2Findex.ts;h=917cf68afbb1f8061105241b729ee808e85ea543;hb=eeb98157020c3a0e3f7481ef397b09a741f726bb;hp=b83b050305552038ea26ff110718e30c75844891;hpb=d8b33fabf7ffab673f4cd6a8201aadacf3624b41;p=clo

diff --git a/src/libclo/index.ts b/src/libclo/index.ts
index b83b050..917cf68 100644
--- a/src/libclo/index.ts
+++ b/src/libclo/index.ts
@@ -1,27 +1,348 @@
+import { isKeyObject, isStringObject } from "util/types";
 import {tkTree} from "../parser";
+import {FontStyle, TextStyle, TextWeight} from "../canva";
+import { JSDOM } from "jsdom";
 
+/**
+ * TYPES
+ */
+
+/**
+ * text direction
+ * LTR - left to right
+ * TTB - top to bottom
+ * etc.
+ */
+export enum Direction{
+    LTR,
+    RTL,
+    TTB,
+    BTT,
+}
+
+/**
+ * frame box is a subclass of box
+ * - directionInsideLine : text direction inside a line
+ * - baselineskip : the distance between baselines in px
+ */
+export interface FrameBox extends Box{
+    directionInsideLine : Direction,
+    baseLineskip : number | null,
+}
+
+/**
+ * a basic Box
+ * - x :
+ * - y : 
+ * - textStyle :
+ * - direction :
+ * - width :
+ * - content :
+ */
+export interface Box{
+    x : number | null,
+    y : number | null,
+    textStyle : TextStyle | null,
+    direction : Direction,
+    width : number,
+    height : number,
+    content : string | Box[] | null,
+}
+
+
+/**
+ * DEFAULT CONST PART
+ */
+export const A4_IN_PX = {"width" : 793.7,
+                  "height" : 1122.5};
+
+export const defaultTextStyle : TextStyle = {
+        family : "FreeSerif",
+        size : ptToPx(12),
+        textWeight : TextWeight.REGULAR,
+        fontStyle : FontStyle.ITALIC,
+}
+
+export const defaultFrameStyle : FrameBox = {
+    directionInsideLine : Direction.LTR,
+    direction : Direction.TTB,
+    baseLineskip : ptToPx(15),
+    textStyle : defaultTextStyle,
+    x : A4_IN_PX.width * 0.10,
+    y : A4_IN_PX.height * 0.10,
+    width : A4_IN_PX.width * 0.80,
+    height : A4_IN_PX.height * 0.80,
+    content : null,
+};
+
+/**
+ * definition for cjk scripts
+ *  - Hani : Han Character
+ *  - Hang : Hangul
+ *  - Bopo : Bopomofo
+ *  - Kana : Katakana
+ *  - Hira : Hiragana
+*/
+export const cjkvBlocksInRegex = ["Hani", "Hang", "Bopo", "Kana", "Hira"];
+
+export const cjkvRegexPattern = new RegExp("((?:" +
+    cjkvBlocksInRegex.map((x)=>"\\p{Script_Extensions="+x+"}").join("|") + ")+)", "gu");
+/**
+ * FUNCTION PART
+ */
+/**
+ * convert from ptToPx
+ * @param pt pt size value
+ * @returns the corresponding px value
+ */
+export function ptToPx(pt : number) : number{
+    return pt * 4.0 / 3.0;
+}
+
+
+
+/**
+ *  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 = [];
 
-function foo(arr : tkTree): 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 a splitted tkTree (by CJK and NonCJK)
+ * - Examples:
+ *  ```
+ *  [`many臺中daylight`] => [`many`, `臺中`, `dahylight`]
+ *  ```
+ */ 
+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)){
+            result = result.concat(item.split(cjkvRegexPattern));
+        }
+        else{
+            result.push(item);
+        }
+    }
+
+    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)){
+            result.push([ 'bp', item, "" ]); // push a newline command to the result `tkTree`
+        }
+        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.push("balabala");
+        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 function calculateTextWidthHeight(preprocessed : tkTree, style : TextStyle): void {
+    var dom = new JSDOM(`<!DOCTYPE html><html><head></head>
+    <body><canvas id="canvas"></canvas></body></html>`);
+    
+    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.');
+            
+        }
+
+        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;
+
+        console.log("width: "+width);
+        console.log("height: "+height);
+        console.log("depth: "+depth);
+
+
+    } catch (error) {
+        console.log("Exception "+error);
+    }
+    
+
+}
+
+
+
+
+/**
+ * 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: object ; // 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" : [793.7, 1122.5]};
-        this.preprocessorRegister(foo);
+        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.attrs, attr, val);
+    }
+
+    public getAttr(attr:string) : any{
+        if (Object.keys(this.attrs).length === 0){
+            return this.attrs[attr];
+        }else{
+            return undefined;
+        }
+        
     }
 
     /**
@@ -34,16 +355,22 @@ export class Clo{
 
     public 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;
+        calculateTextWidthHeight(preprocessed, defaultFontStyle);
+
         // TODO
-        console.log("test"+prepro);
+        console.log(preprocessed);
     }
 
     
 }
 
+/*
 export let a = new Clo();
-export default a;
\ No newline at end of file
+export default a; */
\ No newline at end of file