remove the echo interpreter, dissolve interpreter into gfx and Page
This commit is contained in:
Andreas Gal
parent
bffedbb33c
commit
9521168b5c
397
pdf.js
397
pdf.js
@ -1797,18 +1797,38 @@ var Page = (function() {
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? obj
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: null);
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},
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display: function(start, process) {
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display: function(gfx) {
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var xref = this.xref;
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var contents = xref.fetchIfRef(this.contents);
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var resources = xref.fetchIfRef(this.resources);
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var mediaBox = xref.fetchIfRef(this.mediaBox);
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if (!IsStream(contents) || !IsDict(resources))
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error("invalid page contents or resources");
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start(resources, mediaBox);
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gfx.resources = resources;
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gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1],
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width: mediaBox[2] - mediaBox[0],
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height: mediaBox[3] - mediaBox[1] });
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var args = [];
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var map = gfx.map;
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var parser = new Parser(new Lexer(contents), false);
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var obj;
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while (!IsEOF(obj = parser.getObj()))
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process(obj);
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while (!IsEOF(obj = parser.getObj())) {
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if (IsCmd(obj)) {
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var cmd = obj.cmd;
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var fn = map[cmd];
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if (fn)
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// TODO figure out how to type-check vararg functions
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fn.apply(gfx, args);
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else
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error("Unknown command '" + cmd + "'");
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args.length = 0;
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} else {
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if (args.length > 33)
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error("Too many arguments '" + cmd + "'");
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args.push(obj);
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}
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}
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gfx.endDrawing();
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}
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};
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@ -1988,312 +2008,6 @@ var PDFDoc = (function() {
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return constructor;
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})();
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var Interpreter = (function() {
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function constructor(gfx) {
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this.gfx = gfx;
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this.map = {
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// Graphics state
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w: gfx.setLineWidth,
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J: gfx.setLineCap,
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j: gfx.setLineJoin,
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d: gfx.setDash,
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ri: gfx.setRenderingIntent,
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i: gfx.setFlatness,
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q: gfx.save,
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Q: gfx.restore,
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cm: gfx.transform,
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// Path
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m: gfx.moveTo,
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l: gfx.lineTo,
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c: gfx.curveTo,
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h: gfx.closePath,
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re: gfx.rectangle,
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S: gfx.stroke,
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f: gfx.fill,
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"f*": gfx.eoFill,
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B: gfx.fillStroke,
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b: gfx.closeFillStroke,
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n: gfx.endPath,
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// Clipping
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W: gfx.clip,
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"W*": gfx.eoClip,
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// Text
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BT: gfx.beginText,
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ET: gfx.endText,
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Tf: gfx.setFont,
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Td: gfx.moveText,
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Tm: gfx.setTextMatrix,
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Tj: gfx.showText,
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TJ: gfx.showSpacedText,
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// Type3 fonts
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// Color
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CS: gfx.setStrokeColorSpace,
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cs: gfx.setFillColorSpace,
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SC: gfx.setStrokeColor,
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SCN: gfx.setStrokeColorN,
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sc: gfx.setFillColor,
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scn: gfx.setFillColorN,
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g: gfx.setFillGray,
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RG: gfx.setStrokeRGBColor,
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rg: gfx.setFillRGBColor,
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// Shading
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sh: gfx.shadingFill,
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// Images
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// XObjects
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Do: gfx.paintXObject,
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// Marked content
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// Compatibility
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};
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}
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constructor.prototype = {
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interpret: function(page) {
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var gfx = this.gfx;
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var map = this.map;
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var args = [];
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page.display(
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function(resources, mediaBox) {
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gfx.resources = resources;
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gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1],
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width: mediaBox[2] - mediaBox[0],
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height: mediaBox[3] - mediaBox[1] });
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},
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function(obj) {
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if (IsCmd(obj)) {
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var cmd = obj.cmd;
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var fn = map[cmd];
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if (fn)
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// TODO figure out how to type-check vararg functions
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fn.apply(gfx, args);
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else
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error("Unknown command '" + cmd + "'");
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args.length = 0;
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} else {
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if (args.length > 33)
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error("Too many arguments '" + cmd + "'");
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args.push(obj);
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}
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}
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);
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this.gfx.endDrawing();
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}
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};
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return constructor;
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})();
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var EchoGraphics = (function() {
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function constructor() {
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this.out = "";
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this.indentation = 0;
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this.indentationStr = "";
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}
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constructor.prototype = {
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beginDrawing: function(mediaBox) {
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this.printdentln("/MediaBox ["+
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mediaBox.x +" "+ mediaBox.y +" "+
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mediaBox.width +" "+ mediaBox.height +" ]");
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},
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endDrawing: function() {
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},
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// Graphics state
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setLineWidth: function(width) {
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this.printdentln(width +" w");
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},
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setLineCap: function(style) {
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this.printdentln(style +" J");
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},
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setLineJoin: function(style) {
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this.printdentln(style +" j");
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},
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setDash: function(dashArray, dashPhase) {
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this.printdentln(""+ dashArray +" "+ dashPhase +" d");
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},
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setRenderingIntent: function(intent) {
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this.printdentln("/"+ intent.name + " ri");
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},
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setFlatness: function(flatness) {
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this.printdentln(""+ flatness +" i");
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},
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save: function() {
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this.printdentln("q");
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},
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restore: function() {
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this.printdentln("Q");
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},
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transform: function(a, b, c, d, e, f) {
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this.printdentln(""+ a +" "+ b +" "+ c +
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" "+d +" "+ e +" "+ f + " cm");
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},
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// Path
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moveTo: function(x, y) {
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this.printdentln(""+ x +" "+ y +" m");
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},
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lineTo: function(x, y) {
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this.printdentln(""+ x +" "+ y +" l");
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},
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curveTo: function(x1, y1, x2, y2, x3, y3) {
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this.printdentln(""+ x1 +" "+ y1 +
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" "+ x2 +" "+ y2 +
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" "+ x3 +" "+ y3 + " c");
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},
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closePath: function() {
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this.printdentln("h");
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},
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rectangle: function(x, y, width, height) {
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this.printdentln(""+ x +" "+ y + " "+ width +" "+ height +" re");
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},
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stroke: function() {
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this.printdentln("S");
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},
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fill: function() {
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this.printdentln("f");
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},
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eoFill: function() {
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this.printdentln("f*");
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},
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fillStroke: function() {
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this.printdentln("B");
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},
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closeFillStroke: function() {
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this.printdentln("b");
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},
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endPath: function() {
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this.printdentln("n");
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},
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// Clipping
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clip: function() {
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this.printdentln("W");
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},
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eoClip: function() {
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this.printdentln("W*");
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},
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// Text
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beginText: function() {
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this.printdentln("BT");
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this.indent();
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},
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endText: function() {
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this.dedent();
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this.printdentln("ET");
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},
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setFont: function(fontRef, size) {
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var font = this.resources.get("Font").get(fontRef.name);
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this.printdentln("/"+ font.name +" "+ size +" Tf");
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},
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moveText: function (x, y) {
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this.printdentln(""+ x +" "+ y +" Td");
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},
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setTextMatrix: function(a, b, c, d, e, f) {
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this.printdentln(""+ a +" "+ b +" "+ c +
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" "+d +" "+ e +" "+ f + " Tm");
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},
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showText: function(text) {
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this.printdentln("( "+ text +" ) Tj");
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},
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showSpacedText: function(arr) {
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this.printdentln(""+ arr +" TJ");
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},
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// Type3 fonts
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// Color
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setStrokeColorSpace: function(space) {
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this.printdentln("/"+ space.name +" CS");
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},
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setFillColorSpace: function(space) {
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this.printdentln("/"+ space.name +" cs");
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},
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setStrokeColor: function(/*...*/) {
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this.printdent("");
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for (var i = 0; i < arguments.length; ++i)
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this.print(""+ arguments[i] +" ");
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this.printdentln("SC");
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},
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setStrokeColorN: function(/*...*/) {
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this.printdent("");
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for (var i = 0; i < arguments.length; ++i)
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this.print(""+ arguments[i] +" ");
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this.printdentln("SCN");
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},
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setFillColor: function(/*...*/) {
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this.printdent("");
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for (var i = 0; i < arguments.length; ++i)
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this.print(""+ arguments[i] +" ");
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this.printdentln("sc");
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},
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setFillColorN: function(/*...*/) {
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this.printdent("");
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for (var i = 0; i < arguments.length; ++i)
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this.print(""+ arguments[i] +" ");
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this.printdentln("scn");
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},
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setFillGray: function(gray) {
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this.printdentln(""+ gray +" g");
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},
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setStrokeRGBColor: function(r, g, b) {
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this.printdentln(""+ r +" "+ g +" "+ b +" RG");
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},
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setFillRGBColor: function(r, g, b) {
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this.printdentln(""+ r +" "+ g +" "+ b +" rg");
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},
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// Shading
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shadingFill: function(entry) {
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this.printdentln("/"+ entry.name +" sh");
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},
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// Images
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// XObjects
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paintXObject: function(obj) {
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this.printdentln("/"+ obj.name +" Do");
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},
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// Marked content
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// Compatibility
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// Output state
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print: function(str) {
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this.out += str;
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},
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println: function(str) {
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this.print(str);
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this.out += "\n";
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},
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printdent: function(str) {
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this.print(this.indentationStr);
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this.print(str);
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},
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printdentln: function(str) {
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this.printdent(str);
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this.println("");
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},
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indent: function() {
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this.indentation += 2;
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this.indentationStr += " ";
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},
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dedent: function() {
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this.indentation -= 2;
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this.indentationStr = this.indentationStr.slice(0, -2);
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},
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};
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return constructor;
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})();
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// <canvas> contexts store most of the state we need natively.
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// However, PDF needs a bit more state, which we store here.
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var CanvasExtraState = (function() {
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@ -2317,6 +2031,67 @@ var CanvasGraphics = (function() {
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this.current = new CanvasExtraState();
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this.stateStack = [ ];
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this.pendingClip = null;
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this.map = {
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// Graphics state
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w: this.setLineWidth,
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J: this.setLineCap,
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j: this.setLineJoin,
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d: this.setDash,
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ri: this.setRenderingIntent,
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i: this.setFlatness,
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q: this.save,
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Q: this.restore,
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cm: this.transform,
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// Path
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m: this.moveTo,
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l: this.lineTo,
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c: this.curveTo,
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h: this.closePath,
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re: this.rectangle,
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S: this.stroke,
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f: this.fill,
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"f*": this.eoFill,
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B: this.fillStroke,
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b: this.closeFillStroke,
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n: this.endPath,
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// Clipping
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W: this.clip,
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"W*": this.eoClip,
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// Text
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BT: this.beginText,
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ET: this.endText,
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Tf: this.setFont,
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Td: this.moveText,
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Tm: this.setTextMatrix,
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Tj: this.showText,
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TJ: this.showSpacedText,
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// Type3 fonts
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// Color
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CS: this.setStrokeColorSpace,
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cs: this.setFillColorSpace,
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SC: this.setStrokeColor,
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SCN: this.setStrokeColorN,
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sc: this.setFillColor,
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scn: this.setFillColorN,
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g: this.setFillGray,
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RG: this.setStrokeRGBColor,
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rg: this.setFillRGBColor,
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// Shading
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sh: this.shadingFill,
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// Images
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// XObjects
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Do: this.paintXObject,
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// Marked content
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// Compatibility
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};
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}
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var LINE_CAP_STYLES = [ "butt", "round", "square" ];
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@ -2525,7 +2300,7 @@ function runParseTests() {
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var data = snarf("/tmp/paper.pdf", "binary");
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var pdf = new PDFDoc(new Stream(data));
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var page = pdf.getPage(1);
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page.display();
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//page.display();
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}
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if ("arguments" in this) {
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