Sakurai/pdf.js
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Merge remote-tracking branch 'upstream/master' into refactor

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This commit is contained in:
Kalervo Kujala 2012-01-05 22:24:35 +02:00
commit bc3b8e0ff1
23 changed files with 1417 additions and 179 deletions
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2
Makefile
View File

@ -129,7 +129,7 @@ browser-test:
#
# <http://code.google.com/closure/utilities/docs/linter_howto.html>
SRC_DIRS := . src utils web test examples/helloworld extensions/firefox \
extensions/firefox/components extensions/chrome
extensions/firefox/components extensions/chrome test/unit
GJSLINT_FILES = $(foreach DIR,$(SRC_DIRS),$(wildcard $(DIR)/*.js))
lint:
gjslint --nojsdoc $(GJSLINT_FILES)

2
README.md
View File

@ -1,6 +1,6 @@
# pdf.js
## Overview

63
src/canvas.js
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@ -255,8 +255,11 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
// Scale so that canvas units are the same as PDF user space units
this.ctx.scale(cw / mediaBox.width, ch / mediaBox.height);
this.textDivs = [];
this.textLayerQueue = [];
// Move the media left-top corner to the (0,0) canvas position
this.ctx.translate(-mediaBox.x, -mediaBox.y);
if (this.textLayer)
this.textLayer.beginLayout();
},
executeIRQueue: function canvasGraphicsExecuteIRQueue(codeIR,
@ -320,27 +323,8 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
endDrawing: function canvasGraphicsEndDrawing() {
this.ctx.restore();
var textLayer = this.textLayer;
if (!textLayer)
return;
var self = this;
var textDivs = this.textDivs;
this.textLayerTimer = setInterval(function renderTextLayer() {
if (textDivs.length === 0) {
clearInterval(self.textLayerTimer);
return;
}
var textDiv = textDivs.shift();
if (textDiv.dataset.textLength > 1) { // avoid div by zero
textLayer.appendChild(textDiv);
// Adjust div width (via letterSpacing) to match canvas text
// Due to the .offsetWidth calls, this is slow
textDiv.style.letterSpacing =
((textDiv.dataset.canvasWidth - textDiv.offsetWidth) /
(textDiv.dataset.textLength - 1)) + 'px';
}
}, 0);
if (this.textLayer)
this.textLayer.endLayout();
},
// Graphics state
@ -359,6 +343,8 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
setDash: function canvasGraphicsSetDash(dashArray, dashPhase) {
this.ctx.mozDash = dashArray;
this.ctx.mozDashOffset = dashPhase;
this.ctx.webkitLineDash = dashArray;
this.ctx.webkitLineDashOffset = dashPhase;
},
setRenderingIntent: function canvasGraphicsSetRenderingIntent(intent) {
TODO('set rendering intent: ' + intent);
@ -630,24 +616,6 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
return geometry;
},
pushTextDivs: function canvasGraphicsPushTextDivs(text) {
var div = document.createElement('div');
var fontSize = this.current.fontSize;
// vScale and hScale already contain the scaling to pixel units
// as mozCurrentTransform reflects ctx.scale() changes
// (see beginDrawing())
var fontHeight = fontSize * text.geom.vScale;
div.dataset.canvasWidth = text.canvasWidth * text.geom.hScale;
div.style.fontSize = fontHeight + 'px';
div.style.fontFamily = this.current.font.loadedName || 'sans-serif';
div.style.left = text.geom.x + 'px';
div.style.top = (text.geom.y - fontHeight) + 'px';
div.innerHTML = text.str;
div.dataset.textLength = text.length;
this.textDivs.push(div);
},
showText: function canvasGraphicsShowText(str, skipTextSelection) {
var ctx = this.ctx;
var current = this.current;
@ -672,6 +640,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
ctx.translate(current.x, current.y);
ctx.scale(textHScale, 1);
ctx.lineWidth /= current.textMatrix[0];
if (textSelection) {
this.save();
@ -708,6 +677,8 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
} else {
ctx.save();
this.applyTextTransforms();
ctx.lineWidth /= current.textMatrix[0] * fontMatrix[0];
if (textSelection)
text.geom = this.getTextGeometry();
@ -744,7 +715,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
width += charWidth;
text.str += glyph.unicode === ' ' ? '&nbsp;' : glyph.unicode;
text.str += glyph.unicode === ' ' ? '\u00A0' : glyph.unicode;
text.length++;
text.canvasWidth += charWidth;
}
@ -753,7 +724,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
if (textSelection)
this.pushTextDivs(text);
this.textLayer.appendText(text, font.loadedName, fontSize);
return text;
},
@ -796,7 +767,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
if (e < 0 && text.geom.spaceWidth > 0) { // avoid div by zero
var numFakeSpaces = Math.round(-e / text.geom.spaceWidth);
if (numFakeSpaces > 0) {
text.str += '&nbsp;';
text.str += '\u00A0';
text.length++;
}
}
@ -806,7 +777,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
if (textSelection) {
if (shownText.str === ' ') {
text.str += '&nbsp;';
text.str += '\u00A0';
} else {
text.str += shownText.str;
}
@ -819,7 +790,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
if (textSelection)
this.pushTextDivs(text);
this.textLayer.appendText(text, font.loadedName, fontSize);
},
nextLineShowText: function canvasGraphicsNextLineShowText(text) {
this.nextLine();

140
src/core.js
View File

@ -70,8 +70,7 @@ var Page = (function PageClosure() {
this.xref = xref;
this.ref = ref;
this.ctx = null;
this.callback = null;
this.displayReadyPromise = null;
}
Page.prototype = {
@ -110,9 +109,11 @@ var Page = (function PageClosure() {
width: this.width,
height: this.height
};
var mediaBox = this.mediaBox;
var offsetX = mediaBox[0], offsetY = mediaBox[1];
if (isArray(obj) && obj.length == 4) {
var tl = this.rotatePoint(obj[0], obj[1]);
var br = this.rotatePoint(obj[2], obj[3]);
var tl = this.rotatePoint(obj[0] - offsetX, obj[1] - offsetY);
var br = this.rotatePoint(obj[2] - offsetX, obj[3] - offsetY);
view.x = Math.min(tl.x, br.x);
view.y = Math.min(tl.y, br.y);
view.width = Math.abs(tl.x - br.x);
@ -165,20 +166,12 @@ var Page = (function PageClosure() {
IRQueue, fonts) {
var self = this;
this.IRQueue = IRQueue;
var gfx = new CanvasGraphics(this.ctx, this.objs, this.textLayer);
var displayContinuation = function pageDisplayContinuation() {
// Always defer call to display() to work around bug in
// Firefox error reporting from XHR callbacks.
setTimeout(function pageSetTimeout() {
try {
self.display(gfx, self.callback);
} catch (e) {
if (self.callback)
self.callback(e);
else
throw e;
}
self.displayReadyPromise.resolve();
});
};
@ -395,12 +388,35 @@ var Page = (function PageClosure() {
return items;
},
startRendering: function pageStartRendering(ctx, callback, textLayer) {
this.ctx = ctx;
this.callback = callback;
this.textLayer = textLayer;
this.startRenderingTime = Date.now();
this.pdf.startRendering(this);
// If there is no displayReadyPromise yet, then the IRQueue was never
// requested before. Make the request and create the promise.
if (!this.displayReadyPromise) {
this.pdf.startRendering(this);
this.displayReadyPromise = new Promise();
}
// Once the IRQueue and fonts are loaded, perform the actual rendering.
this.displayReadyPromise.then(
function pageDisplayReadyPromise() {
var gfx = new CanvasGraphics(ctx, this.objs, textLayer);
try {
this.display(gfx, callback);
} catch (e) {
if (callback)
callback(e);
else
throw e;
}
}.bind(this),
function pageDisplayReadPromiseError(reason) {
if (callback)
callback(reason);
else
throw reason;
}
);
}
};
@ -523,10 +539,19 @@ var PDFDocModel = (function PDFDocModelClosure() {
},
setup: function pdfDocSetup(ownerPassword, userPassword) {
this.checkHeader();
this.xref = new XRef(this.stream,
this.startXRef,
this.mainXRefEntriesOffset);
this.catalog = new Catalog(this.xref);
var xref = new XRef(this.stream,
this.startXRef,
this.mainXRefEntriesOffset);
this.xref = xref;
this.catalog = new Catalog(xref);
if (xref.trailer && xref.trailer.has('ID')) {
var fileID = '';
var id = xref.fetchIfRef(xref.trailer.get('ID'))[0];
id.split('').forEach(function(el) {
fileID += Number(el.charCodeAt(0)).toString(16);
});
this.fileID = fileID;
}
},
get numPages() {
var linearization = this.linearization;
@ -534,6 +559,22 @@ var PDFDocModel = (function PDFDocModelClosure() {
// shadow the prototype getter
return shadow(this, 'numPages', num);
},
getFingerprint: function pdfDocGetFingerprint() {
if (this.fileID) {
return this.fileID;
} else {
// If we got no fileID, then we generate one,
// from the first 100 bytes of PDF
var data = this.stream.bytes.subarray(0, 100);
var hash = calculateMD5(data, 0, data.length);
var strHash = '';
for (var i = 0, length = hash.length; i < length; i++) {
strHash += Number(hash[i]).toString(16);
}
return strHash;
}
},
getPage: function pdfDocGetPage(n) {
return this.catalog.getPage(n);
}
@ -560,7 +601,7 @@ var PDFDoc = (function PDFDocClosure() {
this.data = data;
this.stream = stream;
this.pdf = new PDFDocModel(stream);
this.fingerprint = this.pdf.getFingerprint();
this.catalog = this.pdf.catalog;
this.objs = new PDFObjects();
@ -579,36 +620,35 @@ var PDFDoc = (function PDFDocClosure() {
throw 'No PDFJS.workerSrc specified';
}
var worker;
try {
worker = new Worker(workerSrc);
} catch (e) {
// Some versions of FF can't create a worker on localhost, see:
// https://bugzilla.mozilla.org/show_bug.cgi?id=683280
globalScope.PDFJS.disableWorker = true;
this.setupFakeWorker();
var worker = new Worker(workerSrc);
var messageHandler = new MessageHandler('main', worker);
// Tell the worker the file it was created from.
messageHandler.send('workerSrc', workerSrc);
messageHandler.on('test', function pdfDocTest(supportTypedArray) {
if (supportTypedArray) {
this.worker = worker;
this.setupMessageHandler(messageHandler);
} else {
globalScope.PDFJS.disableWorker = true;
this.setupFakeWorker();
}
}.bind(this));
var testObj = new Uint8Array(1);
// Some versions of Opera throw a DATA_CLONE_ERR on
// serializing the typed array.
messageHandler.send('test', testObj);
return;
}
var messageHandler = new MessageHandler('main', worker);
// Tell the worker the file it was created from.
messageHandler.send('workerSrc', workerSrc);
messageHandler.on('test', function pdfDocTest(supportTypedArray) {
if (supportTypedArray) {
this.worker = worker;
this.setupMessageHandler(messageHandler);
} else {
this.setupFakeWorker();
}
}.bind(this));
var testObj = new Uint8Array(1);
messageHandler.send('test', testObj);
} else {
this.setupFakeWorker();
} catch (e) {}
}
// Either workers are disabled, not supported or have thrown an exception.
// Thus, we fallback to a faked worker.
globalScope.PDFJS.disableWorker = true;
this.setupFakeWorker();
}
PDFDoc.prototype = {
@ -692,8 +732,8 @@ var PDFDoc = (function PDFDocClosure() {
messageHandler.on('page_error', function pdfDocError(data) {
var page = this.pageCache[data.pageNum];
if (page.callback)
page.callback(data.error);
if (page.displayReadyPromise)
page.displayReadyPromise.reject(data.error);
else
throw data.error;
}, this);

2
src/fonts.js
View File

@ -2092,7 +2092,7 @@ var Font = (function FontClosure() {
window.btoa(data) + ');');
var rule = "@font-face { font-family:'" + fontName + "';src:" + url + '}';
document.documentElement.firstChild.appendChild(
document.documentElement.getElementsByTagName('head')[0].appendChild(
document.createElement('style'));
var styleSheet = document.styleSheets[document.styleSheets.length - 1];

553
src/function.js
View File

@ -270,7 +270,6 @@ var PDFFunction = (function PDFFunctionClosure() {
constructStiched: function pdfFunctionConstructStiched(fn, dict, xref) {
var domain = dict.get('Domain');
var range = dict.get('Range');
if (!domain)
error('No domain');
@ -279,13 +278,13 @@ var PDFFunction = (function PDFFunctionClosure() {
if (inputSize != 1)
error('Bad domain for stiched function');
var fnRefs = dict.get('Functions');
var fnRefs = xref.fetchIfRef(dict.get('Functions'));
var fns = [];
for (var i = 0, ii = fnRefs.length; i < ii; ++i)
fns.push(PDFFunction.getIR(xref, xref.fetchIfRef(fnRefs[i])));
var bounds = dict.get('Bounds');
var encode = dict.get('Encode');
var bounds = xref.fetchIfRef(dict.get('Bounds'));
var encode = xref.fetchIfRef(dict.get('Encode'));
return [CONSTRUCT_STICHED, domain, bounds, encode, fns];
},
@ -336,16 +335,550 @@ var PDFFunction = (function PDFFunctionClosure() {
};
},
constructPostScript: function pdfFunctionConstructPostScript() {
return [CONSTRUCT_POSTSCRIPT];
constructPostScript: function pdfFunctionConstructPostScript(fn, dict,
xref) {
var domain = dict.get('Domain');
var range = dict.get('Range');
if (!domain)
error('No domain.');
if (!range)
error('No range.');
var lexer = new PostScriptLexer(fn);
var parser = new PostScriptParser(lexer);
var code = parser.parse();
return [CONSTRUCT_POSTSCRIPT, domain, range, code];
},
constructPostScriptFromIR: function pdfFunctionConstructPostScriptFromIR() {
TODO('unhandled type of function');
return function constructPostScriptFromIRResult() {
return [255, 105, 180];
constructPostScriptFromIR:
function pdfFunctionConstructPostScriptFromIR(IR) {
var domain = IR[1];
var range = IR[2];
var code = IR[3];
var numOutputs = range.length / 2;
var evaluator = new PostScriptEvaluator(code);
// Cache the values for a big speed up, the cache size is limited though
// since the number of possible values can be huge from a PS function.
var cache = new FunctionCache();
return function constructPostScriptFromIRResult(args) {
var initialStack = [];
for (var i = 0, ii = (domain.length / 2); i < ii; ++i) {
initialStack.push(args[i]);
}
var key = initialStack.join('_');
if (cache.has(key))
return cache.get(key);
var stack = evaluator.execute(initialStack);
var transformed = new Array(numOutputs);
for (i = numOutputs - 1; i >= 0; --i) {
var out = stack.pop();
var rangeIndex = 2 * i;
if (out < range[rangeIndex])
out = range[rangeIndex];
else if (out > range[rangeIndex + 1])
out = range[rangeIndex + 1];
transformed[i] = out;
}
cache.set(key, transformed);
return transformed;
};
}
};
})();
var FunctionCache = (function FunctionCacheClosure() {
// Of 10 PDF's with type4 functions the maxium number of distinct values seen
// was 256. This still may need some tweaking in the future though.
var MAX_CACHE_SIZE = 1024;
function FunctionCache() {
this.cache = {};
this.total = 0;
}
FunctionCache.prototype = {
has: function has(key) {
return key in this.cache;
},
get: function get(key) {
return this.cache[key];
},
set: function set(key, value) {
if (this.total < MAX_CACHE_SIZE) {
this.cache[key] = value;
this.total++;
}
}
};
return FunctionCache;
})();
var PostScriptStack = (function PostScriptStackClosure() {
var MAX_STACK_SIZE = 100;
function PostScriptStack(initialStack) {
this.stack = initialStack || [];
}
PostScriptStack.prototype = {
push: function push(value) {
if (this.stack.length >= MAX_STACK_SIZE)
error('PostScript function stack overflow.');
this.stack.push(value);
},
pop: function pop() {
if (this.stack.length <= 0)
error('PostScript function stack underflow.');
return this.stack.pop();
},
copy: function copy(n) {
if (this.stack.length + n >= MAX_STACK_SIZE)
error('PostScript function stack overflow.');
var stack = this.stack;
for (var i = stack.length - n, j = n - 1; j >= 0; j--, i++)
stack.push(stack[i]);
},
index: function index(n) {
this.push(this.stack[this.stack.length - n - 1]);
},
// rotate the last n stack elements p times
roll: function roll(n, p) {
var stack = this.stack;
var l = stack.length - n;
var r = stack.length - 1, c = l + (p - Math.floor(p / n) * n), i, j, t;
for (i = l, j = r; i < j; i++, j--) {
t = stack[i]; stack[i] = stack[j]; stack[j] = t;
}
for (i = l, j = c - 1; i < j; i++, j--) {
t = stack[i]; stack[i] = stack[j]; stack[j] = t;
}
for (i = c, j = r; i < j; i++, j--) {
t = stack[i]; stack[i] = stack[j]; stack[j] = t;
}
}
};
return PostScriptStack;
})();
var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
function PostScriptEvaluator(operators, operands) {
this.operators = operators;
this.operands = operands;
}
PostScriptEvaluator.prototype = {
execute: function execute(initialStack) {
var stack = new PostScriptStack(initialStack);
var counter = 0;
var operators = this.operators;
var length = operators.length;
var operator, a, b;
while (counter < length) {
operator = operators[counter++];
if (typeof operator == 'number') {
// Operator is really an operand and should be pushed to the stack.
stack.push(operator);
continue;
}
switch (operator) {
// non standard ps operators
case 'jz': // jump if false
b = stack.pop();
a = stack.pop();
if (!a)
counter = b;
break;
case 'j': // jump
a = stack.pop();
counter = a;
break;
// all ps operators in alphabetical order (excluding if/ifelse)
case 'abs':
a = stack.pop();
stack.push(Math.abs(a));
break;
case 'add':
b = stack.pop();
a = stack.pop();
stack.push(a + b);
break;
case 'and':
b = stack.pop();
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a && b);
else
stack.push(a & b);
break;
case 'atan':
a = stack.pop();
stack.push(Math.atan(a));
break;
case 'bitshift':
b = stack.pop();
a = stack.pop();
if (a > 0)
stack.push(a << b);
else
stack.push(a >> b);
break;
case 'ceiling':
a = stack.pop();
stack.push(Math.ceil(a));
break;
case 'copy':
a = stack.pop();
stack.copy(a);
break;
case 'cos':
a = stack.pop();
stack.push(Math.cos(a));
break;
case 'cvi':
a = stack.pop() | 0;
stack.push(a);
break;
case 'cvr':
// noop
break;
case 'div':
b = stack.pop();
a = stack.pop();
stack.push(a / b);
break;
case 'dup':
stack.copy(1);
break;
case 'eq':
b = stack.pop();
a = stack.pop();
stack.push(a == b);
break;
case 'exch':
stack.roll(2, 1);
break;
case 'exp':
b = stack.pop();
a = stack.pop();
stack.push(Math.pow(a, b));
break;
case 'false':
stack.push(false);
break;
case 'floor':
a = stack.pop();
stack.push(Math.floor(a));
break;
case 'ge':
b = stack.pop();
a = stack.pop();
stack.push(a >= b);
break;
case 'gt':
b = stack.pop();
a = stack.pop();
stack.push(a > b);
break;
case 'idiv':
b = stack.pop();
a = stack.pop();
stack.push((a / b) | 0);
break;
case 'index':
a = stack.pop();
stack.index(a);
break;
case 'le':
b = stack.pop();
a = stack.pop();
stack.push(a <= b);
break;
case 'ln':
a = stack.pop();
stack.push(Math.log(a));
break;
case 'log':
a = stack.pop();
stack.push(Math.log(a) / Math.LN10);
break;
case 'lt':
b = stack.pop();
a = stack.pop();
stack.push(a < b);
break;
case 'mod':
b = stack.pop();
a = stack.pop();
stack.push(a % b);
break;
case 'mul':
b = stack.pop();
a = stack.pop();
stack.push(a * b);
break;
case 'ne':
b = stack.pop();
a = stack.pop();
stack.push(a != b);
break;
case 'neg':
a = stack.pop();
stack.push(-b);
break;
case 'not':
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a && b);
else
stack.push(a & b);
break;
case 'or':
b = stack.pop();
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a || b);
else
stack.push(a | b);
break;
case 'pop':
stack.pop();
break;
case 'roll':
b = stack.pop();
a = stack.pop();
stack.roll(a, b);
break;
case 'round':
a = stack.pop();
stack.push(Math.round(a));
break;
case 'sin':
a = stack.pop();
stack.push(Math.sin(a));
break;
case 'sqrt':
a = stack.pop();
stack.push(Math.sqrt(a));
break;
case 'sub':
b = stack.pop();
a = stack.pop();
stack.push(a - b);
break;
case 'true':
stack.push(true);
break;
case 'truncate':
a = stack.pop();
a = a < 0 ? Math.ceil(a) : Math.floor(a);
stack.push(a);
break;
case 'xor':
b = stack.pop();
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a != b);
else
stack.push(a ^ b);
break;
default:
error('Unknown operator ' + operator);
break;
}
}
return stack.stack;
}
};
return PostScriptEvaluator;
})();
var PostScriptParser = (function PostScriptParserClosure() {
function PostScriptParser(lexer) {
this.lexer = lexer;
this.operators = [];
this.token;
this.prev;
}
PostScriptParser.prototype = {
nextToken: function nextToken() {
this.prev = this.token;
this.token = this.lexer.getToken();
},
accept: function accept(type) {
if (this.token.type == type) {
this.nextToken();
return true;
}
return false;
},
expect: function expect(type) {
if (this.accept(type))
return true;
error('Unexpected symbol: found ' + this.token.type + ' expected ' +
type + '.');
},
parse: function parse() {
this.nextToken();
this.expect(PostScriptTokenTypes.LBRACE);
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
return this.operators;
},
parseBlock: function parseBlock() {
while (true) {
if (this.accept(PostScriptTokenTypes.NUMBER)) {
this.operators.push(this.prev.value);
} else if (this.accept(PostScriptTokenTypes.OPERATOR)) {
this.operators.push(this.prev.value);
} else if (this.accept(PostScriptTokenTypes.LBRACE)) {
this.parseCondition();
} else {
return;
}
}
},
parseCondition: function parseCondition() {
// Add two place holders that will be updated later
var conditionLocation = this.operators.length;
this.operators.push(null, null);
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
if (this.accept(PostScriptTokenTypes.IF)) {
// The true block is right after the 'if' so it just falls through on
// true else it jumps and skips the true block.
this.operators[conditionLocation] = this.operators.length;
this.operators[conditionLocation + 1] = 'jz';
} else if (this.accept(PostScriptTokenTypes.LBRACE)) {
var jumpLocation = this.operators.length;
this.operators.push(null, null);
var endOfTrue = this.operators.length;
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
this.expect(PostScriptTokenTypes.IFELSE);
// The jump is added at the end of the true block to skip the false
// block.
this.operators[jumpLocation] = this.operators.length;
this.operators[jumpLocation + 1] = 'j';
this.operators[conditionLocation] = endOfTrue;
this.operators[conditionLocation + 1] = 'jz';
} else {
error('PS Function: error parsing conditional.');
}
}
};
return PostScriptParser;
})();
var PostScriptTokenTypes = {
LBRACE: 0,
RBRACE: 1,
NUMBER: 2,
OPERATOR: 3,
IF: 4,
IFELSE: 5
};
var PostScriptToken = (function PostScriptTokenClosure() {
function PostScriptToken(type, value) {
this.type = type;
this.value = value;
}
var opCache = {};
PostScriptToken.getOperator = function getOperator(op) {
var opValue = opCache[op];
if (opValue)
return opValue;
return opCache[op] = new PostScriptToken(PostScriptTokenTypes.OPERATOR, op);
};
PostScriptToken.LBRACE = new PostScriptToken(PostScriptTokenTypes.LBRACE,
'{');
PostScriptToken.RBRACE = new PostScriptToken(PostScriptTokenTypes.RBRACE,
'}');
PostScriptToken.IF = new PostScriptToken(PostScriptTokenTypes.IF, 'IF');
PostScriptToken.IFELSE = new PostScriptToken(PostScriptTokenTypes.IFELSE,
'IFELSE');
return PostScriptToken;
})();
var PostScriptLexer = (function PostScriptLexerClosure() {
function PostScriptLexer(stream) {
this.stream = stream;
}
PostScriptLexer.prototype = {
getToken: function getToken() {
var s = '';
var ch;
var comment = false;
var stream = this.stream;
// skip comments
while (true) {
if (!(ch = stream.getChar()))
return EOF;
if (comment) {
if (ch == '\x0a' || ch == '\x0d')
comment = false;
} else if (ch == '%') {
comment = true;
} else if (!Lexer.isSpace(ch)) {
break;
}
}
switch (ch) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '+': case '-': case '.':
return new PostScriptToken(PostScriptTokenTypes.NUMBER,
this.getNumber(ch));
case '{':
return PostScriptToken.LBRACE;
case '}':
return PostScriptToken.RBRACE;
}
// operator
var str = ch.toLowerCase();
while (true) {
ch = stream.lookChar().toLowerCase();
if (ch >= 'a' && ch <= 'z')
str += ch;
else
break;
stream.skip();
}
switch (str) {
case 'if':
return PostScriptToken.IF;
case 'ifelse':
return PostScriptToken.IFELSE;
default:
return PostScriptToken.getOperator(str);
}
},
getNumber: function getNumber(ch) {
var str = ch;
var stream = this.stream;
while (true) {
ch = stream.lookChar();
if ((ch >= '0' && ch <= '9') || ch == '-' || ch == '.')
str += ch;
else
break;
stream.skip();
}
var value = parseFloat(str);
if (isNaN(value))
error('Invalid floating point number: ' + value);
return value;
}
};
return PostScriptLexer;
})();

12
src/obj.js
View File

@ -8,8 +8,7 @@ var Name = (function NameClosure() {
this.name = name;
}
Name.prototype = {
};
Name.prototype = {};
return Name;
})();
@ -19,9 +18,7 @@ var Cmd = (function CmdClosure() {
this.cmd = cmd;
}
Cmd.prototype = {
};
Cmd.prototype = {};
var cmdCache = {};
@ -80,8 +77,7 @@ var Ref = (function RefClosure() {
this.gen = gen;
}
Ref.prototype = {
};
Ref.prototype = {};
return Ref;
})();
@ -273,7 +269,7 @@ var XRef = (function XRefClosure() {
this.entries = [];
this.xrefstms = {};
var trailerDict = this.readXRef(startXRef);
this.trailer = trailerDict;
// prepare the XRef cache
this.cache = [];

18
src/stream.js
View File

@ -1856,10 +1856,10 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
// values. The first array element indicates whether a valid code is being
// returned. The second array element is the actual code. The third array
// element indicates whether EOF was reached.
var findTableCode = function ccittFaxStreamFindTableCode(start, end, table,
limit) {
var limitValue = limit || 0;
CCITTFaxStream.prototype.findTableCode =
function ccittFaxStreamFindTableCode(start, end, table, limit) {
var limitValue = limit || 0;
for (var i = start; i <= end; ++i) {
var code = this.lookBits(i);
if (code == EOF)
@ -1890,7 +1890,7 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
return p[1];
}
} else {
var result = findTableCode(1, 7, twoDimTable);
var result = this.findTableCode(1, 7, twoDimTable);
if (result[0] && result[2])
return result[1];
}
@ -1919,11 +1919,11 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
return p[1];
}
} else {
var result = findTableCode(1, 9, whiteTable2);
var result = this.findTableCode(1, 9, whiteTable2);
if (result[0])
return result[1];
result = findTableCode(11, 12, whiteTable1);
result = this.findTableCode(11, 12, whiteTable1);
if (result[0])
return result[1];
}
@ -1952,15 +1952,15 @@ var CCITTFaxStream = (function CCITTFaxStreamClosure() {
return p[1];
}
} else {
var result = findTableCode(2, 6, blackTable3);
var result = this.findTableCode(2, 6, blackTable3);
if (result[0])
return result[1];
result = findTableCode(7, 12, blackTable2, 64);
result = this.findTableCode(7, 12, blackTable2, 64);
if (result[0])
return result[1];
result = findTableCode(10, 13, blackTable1);
result = this.findTableCode(10, 13, blackTable1);
if (result[0])
return result[1];
}

32
src/util.js
View File

@ -206,6 +206,8 @@ var Promise = (function PromiseClosure() {
*/
function Promise(name, data) {
this.name = name;
this.isRejected = false;
this.error = null;
// If you build a promise and pass in some data it's already resolved.
if (data != null) {
this.isResolved = true;
@ -216,6 +218,7 @@ var Promise = (function PromiseClosure() {
this._data = EMPTY_PROMISE;
}
this.callbacks = [];
this.errbacks = [];
};
/**
* Builds a promise that is resolved when all the passed in promises are
@ -282,9 +285,12 @@ var Promise = (function PromiseClosure() {
if (this.isResolved) {
throw 'A Promise can be resolved only once ' + this.name;
}
if (this.isRejected) {
throw 'The Promise was already rejected ' + this.name;
}
this.isResolved = true;
this.data = data;
this.data = data || null;
var callbacks = this.callbacks;
for (var i = 0, ii = callbacks.length; i < ii; i++) {
@ -292,7 +298,24 @@ var Promise = (function PromiseClosure() {
}
},
then: function promiseThen(callback) {
reject: function proimseReject(reason) {
if (this.isRejected) {
throw 'A Promise can be rejected only once ' + this.name;
}
if (this.isResolved) {
throw 'The Promise was already resolved ' + this.name;
}
this.isRejected = true;
this.error = reason || null;
var errbacks = this.errbacks;
for (var i = 0, ii = errbacks.length; i < ii; i++) {
errbacks[i].call(null, reason);
}
},
then: function promiseThen(callback, errback) {
if (!callback) {
throw 'Requiring callback' + this.name;
}
@ -301,8 +324,13 @@ var Promise = (function PromiseClosure() {
if (this.isResolved) {
var data = this.data;
callback.call(null, data);
} else if (this.isRejected && errorback) {
var error = this.error;
errback.call(null, error);
} else {
this.callbacks.push(callback);
if (errback)
this.errbacks.push(errback);
}
}
};

11
test/driver.js
View File

@ -165,9 +165,14 @@ function nextPage(task, loadError) {
canvas.height = pageHeight * pdfToCssUnitsCoef;
clear(ctx);
// using non-attached to the document div to test
// using the text layer builder that does nothing to test
// text layer creation operations
var textLayer = document.createElement('div');
var textLayerBuilder = {
beginLayout: function nullTextLayerBuilderBeginLayout() {},
endLayout: function nullTextLayerBuilderEndLayout() {},
appendText: function nullTextLayerBuilderAppendText(text, fontName,
fontSize) {}
};
page.startRendering(
ctx,
@ -177,7 +182,7 @@ function nextPage(task, loadError) {
failureMessage = 'render : ' + error.message;
snapshotCurrentPage(task, failureMessage);
},
textLayer
textLayerBuilder
);
} catch (e) {
failure = 'page setup : ' + e.toString();

1
test/pdfs/.gitignore vendored
View File

@ -21,3 +21,4 @@
!freeculture.pdf
!issue918.pdf
!smaskdim.pdf
!type4psfunc.pdf

1
test/pdfs/issue1001.pdf.link Normal file
View File

@ -0,0 +1 @@
http://www.myhillsapartment.com/island_club/floorplans/images/links/Island_IC_brochure.pdf

1
test/pdfs/issue1015.pdf.link Normal file
View File

@ -0,0 +1 @@
http://faculty.washington.edu/fidelr/RayaPubs/TheCaseStudyMethod.pdf

1
test/pdfs/ocs.pdf.link Normal file
View File

@ -0,0 +1 @@
http://www.unibuc.ro/uploads_en/29535/10/Cyrillic_Alphabets-Chars.pdf

BIN
test/pdfs/type4psfunc.pdf Executable file
View File

Binary file not shown.

32
test/test_manifest.json
View File

@ -17,12 +17,13 @@
"rounds": 1,
"type": "load"
},
{ "id": "intelisa-load",
{ "id": "intelisa-eq",
"file": "pdfs/intelisa.pdf",
"md5": "f5712097d29287a97f1278839814f682",
"link": true,
"pageLimit": 100,
"rounds": 1,
"type": "load"
"type": "eq"
},
{ "id": "pdfspec-load",
"file": "pdfs/pdf.pdf",
@ -355,6 +356,13 @@
"rounds": 1,
"type": "eq"
},
{ "id": "issue1001",
"file": "pdfs/issue1001.pdf",
"md5": "0f1496e80a82a923e91d9e74c55ad94e",
"rounds": 1,
"link": true,
"type": "eq"
},
{ "id": "aboutstacks",
"file": "pdfs/aboutstacks.pdf",
"md5": "6e7c8416a293ba2d83bc8dd20c6ccf51",
@ -367,5 +375,25 @@
"md5": "de80aeca7cbf79940189fd34d59671ee",
"rounds": 1,
"type": "eq"
},
{ "id": "type4psfunc",
"file": "pdfs/type4psfunc.pdf",
"md5": "7e6027a02ff78577f74dccdf84e37189",
"rounds": 1,
"type": "eq"
},
{ "id": "ocs",
"file": "pdfs/ocs.pdf",
"md5": "2ade57e954ae7632749cf328daeaa7a8",
"rounds": 1,
"link": true,
"type": "load"
},
{ "id": "issue1015",
"file": "pdfs/issue1015.pdf",
"md5": "b61503d1b445742b665212866afb60e2",
"rounds": 1,
"link": true,
"type": "eq"
}
]

225
test/unit/function_spec.js Normal file
View File

@ -0,0 +1,225 @@
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
describe('function', function() {
beforeEach(function() {
this.addMatchers({
toMatchArray: function(expected) {
var actual = this.actual;
if (actual.length != expected.length)
return false;
for (var i = 0; i < expected.length; i++) {
var a = actual[i], b = expected[i];
if (isArray(b)) {
if (a.length != b.length)
return false;
for (var j = 0; j < a.length; j++) {
var suba = a[j], subb = b[j];
if (suba !== subb)
return false;
}
} else {
if (a !== b)
return false;
}
}
return true;
}
});
});
describe('PostScriptParser', function() {
function parse(program) {
var stream = new StringStream(program);
var parser = new PostScriptParser(new PostScriptLexer(stream));
return parser.parse();
}
it('parses empty programs', function() {
var output = parse('{}');
expect(output.length).toEqual(0);
});
it('parses positive numbers', function() {
var number = 999;
var program = parse('{ ' + number + ' }');
var expectedProgram = [number];
expect(program).toMatchArray(expectedProgram);
});
it('parses negative numbers', function() {
var number = -999;
var program = parse('{ ' + number + ' }');
var expectedProgram = [number];
expect(program).toMatchArray(expectedProgram);
});
it('parses negative floats', function() {
var number = 3.3;
var program = parse('{ ' + number + ' }');
var expectedProgram = [number];
expect(program).toMatchArray(expectedProgram);
});
it('parses operators', function() {
var program = parse('{ sub }');
var expectedProgram = ['sub'];
expect(program).toMatchArray(expectedProgram);
});
it('parses if statements', function() {
var program = parse('{ { 99 } if }');
var expectedProgram = [3, 'jz', 99];
expect(program).toMatchArray(expectedProgram);
});
it('parses ifelse statements', function() {
var program = parse('{ { 99 } { 44 } ifelse }');
var expectedProgram = [5, 'jz', 99, 6, 'j', 44];
expect(program).toMatchArray(expectedProgram);
});
it('handles missing brackets', function() {
expect(function() { parse('{'); }).toThrow(
new Error('Unexpected symbol: found undefined expected 1.'));
});
});
describe('PostScriptEvaluator', function() {
function evaluate(program) {
var stream = new StringStream(program);
var parser = new PostScriptParser(new PostScriptLexer(stream));
var code = parser.parse();
var evaluator = new PostScriptEvaluator(code);
var output = evaluator.execute();
return output;
}
it('pushes stack', function() {
var stack = evaluate('{ 99 }');
var expectedStack = [99];
expect(stack).toMatchArray(expectedStack);
});
it('handles if with true', function() {
var stack = evaluate('{ 1 {99} if }');
var expectedStack = [99];
expect(stack).toMatchArray(expectedStack);
});
it('handles if with false', function() {
var stack = evaluate('{ 0 {99} if }');
var expectedStack = [];
expect(stack).toMatchArray(expectedStack);
});
it('handles ifelse with true', function() {
var stack = evaluate('{ 1 {99} {77} ifelse }');
var expectedStack = [99];
expect(stack).toMatchArray(expectedStack);
});
it('handles ifelse with false', function() {
var stack = evaluate('{ 0 {99} {77} ifelse }');
var expectedStack = [77];
expect(stack).toMatchArray(expectedStack);
});
it('handles nested if', function() {
var stack = evaluate('{ 1 {1 {77} if} if }');
var expectedStack = [77];
expect(stack).toMatchArray(expectedStack);
});
it('abs', function() {
var stack = evaluate('{ -2 abs }');
var expectedStack = [2];
expect(stack).toMatchArray(expectedStack);
});
it('adds', function() {
var stack = evaluate('{ 1 2 add }');
var expectedStack = [3];
expect(stack).toMatchArray(expectedStack);
});
it('boolean ands', function() {
var stack = evaluate('{ true false and }');
var expectedStack = [false];
expect(stack).toMatchArray(expectedStack);
});
it('bitwise ands', function() {
var stack = evaluate('{ 254 1 and }');
var expectedStack = [254 & 1];
expect(stack).toMatchArray(expectedStack);
});
// TODO atan
// TODO bitshift
// TODO ceiling
// TODO copy
// TODO cos
it('converts to int', function() {
var stack = evaluate('{ 9.9 cvi }');
var expectedStack = [9];
expect(stack).toMatchArray(expectedStack);
});
it('converts negatives to int', function() {
var stack = evaluate('{ -9.9 cvi }');
var expectedStack = [-9];
expect(stack).toMatchArray(expectedStack);
});
// TODO cvr
// TODO div
it('duplicates', function() {
var stack = evaluate('{ 99 dup }');
var expectedStack = [99, 99];
expect(stack).toMatchArray(expectedStack);
});
// TODO eq
it('exchanges', function() {
var stack = evaluate('{ 44 99 exch }');
var expectedStack = [99, 44];
expect(stack).toMatchArray(expectedStack);
});
// TODO exp
// TODO false
// TODO floor
// TODO ge
// TODO gt
it('divides to integer', function() {
var stack = evaluate('{ 2 3 idiv }');
var expectedStack = [0];
expect(stack).toMatchArray(expectedStack);
});
it('divides to negative integer', function() {
var stack = evaluate('{ -2 3 idiv }');
var expectedStack = [0];
expect(stack).toMatchArray(expectedStack);
});
it('duplicates index', function() {
var stack = evaluate('{ 4 3 2 1 2 index }');
var expectedStack = [4, 3, 2, 1, 3];
expect(stack).toMatchArray(expectedStack);
});
// TODO le
// TODO ln
// TODO log
// TODO lt
// TODO mod
// TODO mul
// TODO ne
// TODO neg
// TODO not
// TODO or
it('pops stack', function() {
var stack = evaluate('{ 1 2 pop }');
var expectedStack = [1];
expect(stack).toMatchArray(expectedStack);
});
it('rolls stack right', function() {
var stack = evaluate('{ 1 3 2 2 4 1 roll }');
var expectedStack = [2, 1, 3, 2];
expect(stack).toMatchArray(expectedStack);
});
it('rolls stack left', function() {
var stack = evaluate('{ 1 3 2 2 4 -1 roll }');
var expectedStack = [3, 2, 2, 1];
expect(stack).toMatchArray(expectedStack);
});
// TODO round
// TODO sin
// TODO sqrt
// TODO sub
// TODO true
// TODO truncate
// TODO xor
});
});

123
test/unit/obj_spec.js
View File

@ -3,14 +3,129 @@
'use strict';
describe("obj", function() {
describe('obj', function() {
describe("Name", function() {
it("should retain the given name", function() {
var givenName = "Font";
describe('Name', function() {
it('should retain the given name', function() {
var givenName = 'Font';
var name = new Name(givenName);
expect(name.name).toEqual(givenName);
});
});
describe('Cmd', function() {
it('should retain the given cmd name', function() {
var givenCmd = 'BT';
var cmd = new Cmd(givenCmd);
expect(cmd.cmd).toEqual(givenCmd);
});
it('should create only one object for a command and cache it', function() {
var firstBT = Cmd.get('BT');
var secondBT = Cmd.get('BT');
var firstET = Cmd.get('ET');
var secondET = Cmd.get('ET');
expect(firstBT).toBe(secondBT);
expect(firstET).toBe(secondET);
expect(firstBT).not.toBe(firstET);
});
});
describe('Dict', function() {
var checkInvalidHasValues = function(dict) {
expect(dict.has()).toBeFalsy();
expect(dict.has('Prev')).toBeFalsy();
};
var checkInvalidKeyValues = function(dict) {
expect(dict.get()).toBeUndefined();
expect(dict.get('Prev')).toBeUndefined();
expect(dict.get('Decode', 'D')).toBeUndefined();
// Note that the getter with three arguments breaks the pattern here.
expect(dict.get('FontFile', 'FontFile2', 'FontFile3')).toBeNull();
};
var emptyDict, dictWithSizeKey, dictWithManyKeys;
var storedSize = 42;
var testFontFile = 'file1';
var testFontFile2 = 'file2';
var testFontFile3 = 'file3';
beforeEach(function() {
emptyDict = new Dict();
dictWithSizeKey = new Dict();
dictWithSizeKey.set('Size', storedSize);
dictWithManyKeys = new Dict();
dictWithManyKeys.set('FontFile', testFontFile);
dictWithManyKeys.set('FontFile2', testFontFile2);
dictWithManyKeys.set('FontFile3', testFontFile3);
});
it('should return invalid values for unknown keys', function() {
checkInvalidHasValues(emptyDict);
checkInvalidKeyValues(emptyDict);
});
it('should return correct value for stored Size key', function() {
expect(dictWithSizeKey.has('Size')).toBeTruthy();
expect(dictWithSizeKey.get('Size')).toEqual(storedSize);
expect(dictWithSizeKey.get('Prev', 'Size')).toEqual(storedSize);
expect(dictWithSizeKey.get('Prev', 'Root', 'Size')).toEqual(storedSize);
});
it('should return invalid values for unknown keys when Size key is stored',
function() {
checkInvalidHasValues(dictWithSizeKey);
checkInvalidKeyValues(dictWithSizeKey);
});
it('should return correct value for stored Size key with undefined value',
function() {
var dict = new Dict();
dict.set('Size');
expect(dict.has('Size')).toBeTruthy();
checkInvalidKeyValues(dict);
});
it('should return correct values for multiple stored keys', function() {
expect(dictWithManyKeys.has('FontFile')).toBeTruthy();
expect(dictWithManyKeys.has('FontFile2')).toBeTruthy();
expect(dictWithManyKeys.has('FontFile3')).toBeTruthy();
expect(dictWithManyKeys.get('FontFile3')).toEqual(testFontFile3);
expect(dictWithManyKeys.get('FontFile2', 'FontFile3'))
.toEqual(testFontFile2);
expect(dictWithManyKeys.get('FontFile', 'FontFile2', 'FontFile3'))
.toEqual(testFontFile);
});
it('should callback for each stored key', function() {
var callbackSpy = jasmine.createSpy('spy on callback in dictionary');
dictWithManyKeys.forEach(callbackSpy);
expect(callbackSpy).wasCalled();
expect(callbackSpy.argsForCall[0]).toEqual(['FontFile', testFontFile]);
expect(callbackSpy.argsForCall[1]).toEqual(['FontFile2', testFontFile2]);
expect(callbackSpy.argsForCall[2]).toEqual(['FontFile3', testFontFile3]);
expect(callbackSpy.callCount).toEqual(3);
});
});
describe('Ref', function() {
it('should retain the stored values', function() {
var storedNum = 4;
var storedGen = 2;
var ref = new Ref(storedNum, storedGen);
expect(ref.num).toEqual(storedNum);
expect(ref.gen).toEqual(storedGen);
});
});
});

19
test/unit/unit_test.html
View File

@ -11,9 +11,28 @@
<!-- include spec files here... -->
<script type="text/javascript" src="obj_spec.js"></script>
<script type="text/javascript" src="function_spec.js"></script>
<!-- include source files here... -->
<script type="text/javascript" src="../../src/core.js"></script>
<script type="text/javascript" src="../../src/util.js"></script>
<script type="text/javascript" src="../../src/canvas.js"></script>
<script type="text/javascript" src="../../src/obj.js"></script>
<script type="text/javascript" src="../../src/function.js"></script>
<script type="text/javascript" src="../../src/charsets.js"></script>
<script type="text/javascript" src="../../src/cidmaps.js"></script>
<script type="text/javascript" src="../../src/colorspace.js"></script>
<script type="text/javascript" src="../../src/crypto.js"></script>
<script type="text/javascript" src="../../src/evaluator.js"></script>
<script type="text/javascript" src="../../src/fonts.js"></script>
<script type="text/javascript" src="../../src/glyphlist.js"></script>
<script type="text/javascript" src="../../src/image.js"></script>
<script type="text/javascript" src="../../src/metrics.js"></script>
<script type="text/javascript" src="../../src/parser.js"></script>
<script type="text/javascript" src="../../src/pattern.js"></script>
<script type="text/javascript" src="../../src/stream.js"></script>
<script type="text/javascript" src="../../src/worker.js"></script>
<script type="text/javascript" src="../../external/jpgjs/jpg.js"></script>
<script type="text/javascript">
'use strict';

11
web/compatibility.js
View File

@ -5,11 +5,16 @@
// Checking if the typed arrays are supported
(function checkTypedArrayCompatibility() {
if (typeof Uint8Array !== 'undefined')
if (typeof Uint8Array !== 'undefined') {
// some mobile version might not support Float64Array
if (typeof Float64Array === 'undefined')
window.Float64Array = Float32Array;
return;
}
function subarray(start, end) {
return this.slice(start, end);
return new TypedArray(this.slice(start, end));
}
function setArrayOffset(array, offset) {
@ -46,6 +51,8 @@
window.Uint32Array = TypedArray;
window.Int32Array = TypedArray;
window.Uint16Array = TypedArray;
window.Float32Array = TypedArray;
window.Float64Array = TypedArray;
})();
// Object.create() ?

5
web/viewer.css
View File

@ -15,6 +15,7 @@ body {
/* === Toolbar === */
#controls {
background-color: #eee;
background: -o-linear-gradient(bottom,#eee 0%,#fff 100%);
background: -moz-linear-gradient(center bottom, #eee 0%, #fff 100%);
background: -webkit-gradient(linear, left bottom, left top, color-stop(0.0, #ddd), color-stop(1.0, #fff));
border-bottom: 1px solid #666;
@ -82,6 +83,7 @@ span#info {
bottom: 18px;
left: -290px;
transition: left 0.25s ease-in-out 1s;
-o-transition: left 0.25s ease-in-out 1s;
-moz-transition: left 0.25s ease-in-out 1s;
-webkit-transition: left 0.25s ease-in-out 1s;
z-index: 1;
@ -90,6 +92,7 @@ span#info {
#sidebar:hover {
left: 0px;
transition: left 0.25s ease-in-out 0s;
-o-transition: left 0.25s ease-in-out 0s;
-moz-transition: left 0.25s ease-in-out 0s;
-webkit-transition: left 0.25s ease-in-out 0s;
}
@ -327,7 +330,7 @@ canvas {
color: black;
padding: 3px;
margin: 3px;
white-space: pre;
width: 98%;
}
.clearBoth {

5
web/viewer.html
View File

@ -67,10 +67,11 @@
<option value="0.75">75%</option>
<option value="1">100%</option>
<option value="1.25">125%</option>
<option value="1.5" selected="selected">150%</option>
<option value="1.5">150%</option>
<option value="2">200%</option>
<option id="pageWidthOption" value="page-width">Page Width</option>
<option id="pageFitOption" value="page-fit">Page Fit</option>
<option id="pageAutoOption" value="auto" selected="selected">Auto</option>
</select>
<div class="separator"></div>
@ -113,7 +114,7 @@
</button>
</div>
<div class="clearBoth"></div>
<div id="errorMoreInfo" hidden='true'></div>
<textarea id="errorMoreInfo" hidden='true' readonly="readonly"></textarea>
</div>
<div id="sidebar">

337
web/viewer.js
View File

@ -4,7 +4,7 @@
'use strict';
var kDefaultURL = 'compressed.tracemonkey-pldi-09.pdf';
var kDefaultScale = 1.5;
var kDefaultScale = 'auto';
var kDefaultScaleDelta = 1.1;
var kCacheSize = 20;
var kCssUnits = 96.0 / 72.0;
@ -12,6 +12,7 @@ var kScrollbarPadding = 40;
var kMinScale = 0.25;
var kMaxScale = 4.0;
var kImageDirectory = './images/';
var kSettingsMemory = 20;
var Cache = function cacheCache(size) {
var data = [];
@ -25,16 +26,136 @@ var Cache = function cacheCache(size) {
};
};
var RenderingQueue = (function RenderingQueueClosure() {
function RenderingQueue() {
this.items = [];
}
RenderingQueue.prototype = {
enqueueDraw: function RenderingQueueEnqueueDraw(item) {
if (!item.drawingRequired())
return; // as no redraw required, no need for queueing.
if ('rendering' in item)
return; // is already in the queue
item.rendering = true;
this.items.push(item);
if (this.items.length > 1)
return; // not first item
item.draw(this.continueExecution.bind(this));
},
continueExecution: function RenderingQueueContinueExecution() {
var item = this.items.shift();
delete item.rendering;
if (this.items.length == 0)
return; // queue is empty
item = this.items[0];
item.draw(this.continueExecution.bind(this));
}
};
return RenderingQueue;
})();
// Settings Manager - This is a utility for saving settings
// First we see if localStorage is available, FF bug #495747
// If not, we use FUEL in FF
var Settings = (function SettingsClosure() {
var isLocalStorageEnabled = (function localStorageEnabledTest() {
try {
localStorage;
} catch (e) {
return false;
}
return true;
})();
var extPrefix = 'extensions.uriloader@pdf.js';
var isExtension = location.protocol == 'chrome:' && !isLocalStorageEnabled;
var inPrivateBrowsing = false;
if (isExtension) {
var pbs = Components.classes['@mozilla.org/privatebrowsing;1']
.getService(Components.interfaces.nsIPrivateBrowsingService);
inPrivateBrowsing = pbs.privateBrowsingEnabled;
}
function Settings(fingerprint) {
var database = null;
var index;
if (inPrivateBrowsing)
return false;
else if (isExtension)
database = Application.prefs.getValue(extPrefix + '.database', '{}');
else if (isLocalStorageEnabled)
database = localStorage.getItem('database') || '{}';
else
return false;
database = JSON.parse(database);
if (!('files' in database))
database.files = [];
if (database.files.length >= kSettingsMemory)
database.files.shift();
for (var i = 0, length = database.files.length; i < length; i++) {
var branch = database.files[i];
if (branch.fingerprint == fingerprint) {
index = i;
break;
}
}
if (typeof index != 'number')
index = database.files.push({fingerprint: fingerprint}) - 1;
this.file = database.files[index];
this.database = database;
if (isExtension)
Application.prefs.setValue(extPrefix + '.database',
JSON.stringify(database));
else if (isLocalStorageEnabled)
localStorage.setItem('database', JSON.stringify(database));
}
Settings.prototype = {
set: function settingsSet(name, val) {
if (inPrivateBrowsing)
return false;
var file = this.file;
file[name] = val;
if (isExtension)
Application.prefs.setValue(extPrefix + '.database',
JSON.stringify(this.database));
else if (isLocalStorageEnabled)
localStorage.setItem('database', JSON.stringify(this.database));
},
get: function settingsGet(name, defaultValue) {
if (inPrivateBrowsing)
return defaultValue;
else
return this.file[name] || defaultValue;
}
};
return Settings;
})();
var cache = new Cache(kCacheSize);
var renderingQueue = new RenderingQueue();
var currentPageNumber = 1;
var PDFView = {
pages: [],
thumbnails: [],
currentScale: kDefaultScale,
currentScale: 0,
currentScaleValue: null,
initialBookmark: document.location.hash.substring(1),
setScale: function pdfViewSetScale(val, resetAutoSettings) {
if (val == this.currentScale)
return;
var pages = this.pages;
for (var i = 0; i < pages.length; i++)
pages[i].update(val * kCssUnits);
@ -55,6 +176,7 @@ var PDFView = {
return;
var scale = parseFloat(value);
this.currentScaleValue = value;
if (scale) {
this.setScale(scale, true);
return;
@ -73,6 +195,10 @@ var PDFView = {
this.setScale(
Math.min(pageWidthScale, pageHeightScale), resetAutoSettings);
}
if ('auto' == value)
this.setScale(Math.min(1.0, pageWidthScale), resetAutoSettings);
selectScaleOption(value);
},
zoomIn: function pdfViewZoomIn() {
@ -223,13 +349,14 @@ var PDFView = {
};
moreInfoButton.removeAttribute('hidden');
lessInfoButton.setAttribute('hidden', 'true');
errorMoreInfo.innerHTML = 'PDF.JS Build: ' + PDFJS.build + '\n';
errorMoreInfo.value = 'PDF.JS Build: ' + PDFJS.build + '\n';
if (moreInfo) {
errorMoreInfo.innerHTML += 'Message: ' + moreInfo.message;
errorMoreInfo.value += 'Message: ' + moreInfo.message;
if (moreInfo.stack)
errorMoreInfo.innerHTML += '\n' + 'Stack: ' + moreInfo.stack;
errorMoreInfo.value += '\n' + 'Stack: ' + moreInfo.stack;
}
errorMoreInfo.rows = errorMoreInfo.value.split('\n').length - 1;
},
progress: function pdfViewProgress(level) {
@ -243,6 +370,7 @@ var PDFView = {
// when page is painted, using the image as thumbnail base
pageView.onAfterDraw = function pdfViewLoadOnAfterDraw() {
thumbnailView.setImage(pageView.canvas);
preDraw();
};
}
@ -272,8 +400,20 @@ var PDFView = {
this.error('An error occurred while reading the PDF.', e);
}
var pagesCount = pdf.numPages;
var id = pdf.fingerprint;
var storedHash = null;
document.getElementById('numPages').innerHTML = pagesCount;
document.getElementById('pageNumber').max = pagesCount;
PDFView.documentFingerprint = id;
var store = PDFView.store = new Settings(id);
if (store.get('exists', false)) {
var page = store.get('page', '1');
var zoom = store.get('zoom', PDFView.currentScale);
var left = store.get('scrollLeft', '0');
var top = store.get('scrollTop', '0');
storedHash = 'page=' + page + '&zoom=' + zoom + ',' + left + ',' + top;
}
var pages = this.pages = [];
var pagesRefMap = {};
@ -294,7 +434,6 @@ var PDFView = {
this.pagesRefMap = pagesRefMap;
this.destinations = pdf.catalog.destinations;
this.setScale(scale || kDefaultScale, true);
if (pdf.catalog.documentOutline) {
this.outline = new DocumentOutlineView(pdf.catalog.documentOutline);
@ -303,12 +442,20 @@ var PDFView = {
this.switchSidebarView('outline');
}
// Reset the current scale, as otherwise the page's scale might not get
// updated if the zoom level stayed the same.
this.currentScale = 0;
this.currentScaleValue = null;
if (this.initialBookmark) {
this.setHash(this.initialBookmark);
this.initialBookmark = null;
}
else
else if (storedHash)
this.setHash(storedHash);
else {
this.parseScale(scale || kDefaultScale, true);
this.page = 1;
}
},
setHash: function pdfViewSetHash(hash) {
@ -334,8 +481,16 @@ var PDFView = {
if ('zoom' in params) {
var zoomArgs = params.zoom.split(','); // scale,left,top
// building destination array
var dest = [null, new Name('XYZ'), (zoomArgs[1] | 0),
(zoomArgs[2] | 0), (zoomArgs[0] | 0) / 100];
// If the zoom value, it has to get divided by 100. If it is a string,
// it should stay as it is.
var zoomArg = zoomArgs[0];
var zoomArgNumber = parseFloat(zoomArg);
if (zoomArgNumber)
zoomArg = zoomArgNumber / 100;
var dest = [null, {name: 'XYZ'}, (zoomArgs[1] | 0),
(zoomArgs[2] | 0), zoomArg];
var currentPage = this.pages[pageNumber - 1];
currentPage.scrollIntoView(dest);
} else
@ -609,10 +764,15 @@ var PageView = function pageView(container, content, id, pageWidth, pageHeight,
}, 0);
};
this.draw = function pageviewDraw() {
if (div.hasChildNodes()) {
this.drawingRequired = function() {
return !div.hasChildNodes();
};
this.draw = function pageviewDraw(callback) {
if (!this.drawingRequired()) {
this.updateStats();
return false;
callback();
return;
}
var canvas = document.createElement('canvas');
@ -644,13 +804,14 @@ var PageView = function pageView(container, content, id, pageWidth, pageHeight,
this.updateStats();
if (this.onAfterDraw)
this.onAfterDraw();
}).bind(this), textLayer
cache.push(this);
callback();
}).bind(this), new TextLayerBuilder(textLayer)
);
setupAnnotations(this.content, this.scale);
div.setAttribute('data-loaded', true);
return true;
};
this.updateStats = function pageViewUpdateStats() {
@ -717,12 +878,16 @@ var ThumbnailView = function thumbnailView(container, page, id, pageRatio) {
return ctx;
}
this.draw = function thumbnailViewDraw() {
if (this.hasImage)
this.draw = function thumbnailViewDraw(callback) {
if (this.hasImage) {
callback();
return;
}
var ctx = getPageDrawContext();
page.startRendering(ctx, function thumbnailViewDrawStartRendering() {});
page.startRendering(ctx, function thumbnailViewDrawStartRendering() {
callback();
});
this.hasImage = true;
};
@ -775,6 +940,53 @@ var DocumentOutlineView = function documentOutlineView(outline) {
}
};
var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
this.textLayerDiv = textLayerDiv;
this.beginLayout = function textLayerBuilderBeginLayout() {
this.textDivs = [];
this.textLayerQueue = [];
};
this.endLayout = function textLayerBuilderEndLayout() {
var self = this;
var textDivs = this.textDivs;
var textLayerDiv = this.textLayerDiv;
this.textLayerTimer = setInterval(function renderTextLayer() {
if (textDivs.length === 0) {
clearInterval(self.textLayerTimer);
return;
}
var textDiv = textDivs.shift();
if (textDiv.dataset.textLength >= 1) { // avoid div by zero
textLayerDiv.appendChild(textDiv);
// Adjust div width (via letterSpacing) to match canvas text
// Due to the .offsetWidth calls, this is slow
textDiv.style.letterSpacing =
((textDiv.dataset.canvasWidth - textDiv.offsetWidth) /
(textDiv.dataset.textLength - 1)) + 'px';
}
}, 0);
};
this.appendText = function textLayerBuilderAppendText(text,
fontName, fontSize) {
var textDiv = document.createElement('div');
// vScale and hScale already contain the scaling to pixel units
var fontHeight = fontSize * text.geom.vScale;
textDiv.dataset.canvasWidth = text.canvasWidth * text.geom.hScale;
textDiv.style.fontSize = fontHeight + 'px';
textDiv.style.fontFamily = fontName || 'sans-serif';
textDiv.style.left = text.geom.x + 'px';
textDiv.style.top = (text.geom.y - fontHeight) + 'px';
textDiv.textContent = text.str;
textDiv.dataset.textLength = text.length;
this.textDivs.push(textDiv);
};
};
window.addEventListener('load', function webViewerLoad(evt) {
var params = document.location.search.substring(1).split('&');
for (var i = 0; i < params.length; i++) {
@ -782,7 +994,7 @@ window.addEventListener('load', function webViewerLoad(evt) {
params[unescape(param[0])] = unescape(param[1]);
}
var scale = ('scale' in params) ? params.scale : kDefaultScale;
var scale = ('scale' in params) ? params.scale : 0;
PDFView.open(params.file || kDefaultURL, parseFloat(scale));
if (!window.File || !window.FileReader || !window.FileList || !window.Blob)
@ -801,31 +1013,76 @@ window.addEventListener('unload', function webViewerUnload(evt) {
window.scrollTo(0, 0);
}, true);
/**
* Render the next not yet visible page already such that it is
* hopefully ready once the user scrolls to it.
*/
function preDraw() {
var pages = PDFView.pages;
var visible = PDFView.getVisiblePages();
var last = visible[visible.length - 1];
// PageView.id is the actual page number, which is + 1 compared
// to the index in `pages`. That means, pages[last.id] is the next
// PageView instance.
if (pages[last.id] && pages[last.id].drawingRequired()) {
renderingQueue.enqueueDraw(pages[last.id]);
return;
}
// If there is nothing to draw on the next page, maybe the user
// is scrolling up, so, let's try to render the next page *before*
// the first visible page
if (pages[visible[0].id - 2]) {
renderingQueue.enqueueDraw(pages[visible[0].id - 2]);
}
}
function updateViewarea() {
var visiblePages = PDFView.getVisiblePages();
var pageToDraw;
for (var i = 0; i < visiblePages.length; i++) {
var page = visiblePages[i];
if (PDFView.pages[page.id - 1].draw())
cache.push(page.view);
var pageObj = PDFView.pages[page.id - 1];
pageToDraw |= pageObj.drawingRequired();
renderingQueue.enqueueDraw(pageObj);
}
if (!visiblePages.length)
return;
// If there is no need to draw a page that is currenlty visible, preDraw the
// next page the user might scroll to.
if (!pageToDraw) {
preDraw();
}
updateViewarea.inProgress = true; // used in "set page"
var currentId = PDFView.page;
var firstPage = visiblePages[0];
PDFView.page = firstPage.id;
updateViewarea.inProgress = false;
var currentScale = PDFView.currentScale;
var currentScaleValue = PDFView.currentScaleValue;
var normalizedScaleValue = currentScaleValue == currentScale ?
currentScale * 100 : currentScaleValue;
var kViewerTopMargin = 52;
var pageNumber = firstPage.id;
var pdfOpenParams = '#page=' + pageNumber;
pdfOpenParams += '&zoom=' + Math.round(PDFView.currentScale * 100);
pdfOpenParams += '&zoom=' + normalizedScaleValue;
var currentPage = PDFView.pages[pageNumber - 1];
var topLeft = currentPage.getPagePoint(window.pageXOffset,
window.pageYOffset - firstPage.y - kViewerTopMargin);
pdfOpenParams += ',' + Math.round(topLeft.x) + ',' + Math.round(topLeft.y);
var store = PDFView.store;
store.set('exists', true);
store.set('page', pageNumber);
store.set('zoom', normalizedScaleValue);
store.set('scrollLeft', Math.round(topLeft.x));
store.set('scrollTop', Math.round(topLeft.y));
document.getElementById('viewBookmark').href = pdfOpenParams;
}
@ -848,7 +1105,7 @@ function updateThumbViewArea() {
var visibleThumbs = PDFView.getVisibleThumbs();
for (var i = 0; i < visibleThumbs.length; i++) {
var thumb = visibleThumbs[i];
PDFView.thumbnails[thumb.id - 1].draw();
renderingQueue.enqueueDraw(PDFView.thumbnails[thumb.id - 1]);
}
}, delay);
}
@ -858,7 +1115,8 @@ window.addEventListener('webkitTransitionEnd', updateThumbViewArea, true);
window.addEventListener('resize', function webViewerResize(evt) {
if (document.getElementById('pageWidthOption').selected ||
document.getElementById('pageFitOption').selected)
document.getElementById('pageFitOption').selected ||
document.getElementById('pageAutoOption').selected)
PDFView.parseScale(document.getElementById('scaleSelect').value);
updateViewarea();
});
@ -888,7 +1146,6 @@ window.addEventListener('change', function webViewerChange(evt) {
// implemented in Firefox.
var file = files[0];
fileReader.readAsBinaryString(file);
document.title = file.name;
// URL does not reflect proper document location - hiding some icons.
@ -896,20 +1153,9 @@ window.addEventListener('change', function webViewerChange(evt) {
document.getElementById('download').setAttribute('hidden', 'true');
}, true);
window.addEventListener('scalechange', function scalechange(evt) {
var customScaleOption = document.getElementById('customScaleOption');
customScaleOption.selected = false;
if (!evt.resetAutoSettings &&
(document.getElementById('pageWidthOption').selected ||
document.getElementById('pageFitOption').selected)) {
updateViewarea();
return;
}
function selectScaleOption(value) {
var options = document.getElementById('scaleSelect').options;
var predefinedValueFound = false;
var value = '' + evt.scale;
for (var i = 0; i < options.length; i++) {
var option = options[i];
if (option.value != value) {
@ -919,7 +1165,22 @@ window.addEventListener('scalechange', function scalechange(evt) {
option.selected = true;
predefinedValueFound = true;
}
return predefinedValueFound;
}
window.addEventListener('scalechange', function scalechange(evt) {
var customScaleOption = document.getElementById('customScaleOption');
customScaleOption.selected = false;
if (!evt.resetAutoSettings &&
(document.getElementById('pageWidthOption').selected ||
document.getElementById('pageFitOption').selected ||
document.getElementById('pageAutoOption').selected)) {
updateViewarea();
return;
}
var predefinedValueFound = selectScaleOption('' + evt.scale);
if (!predefinedValueFound) {
customScaleOption.textContent = Math.round(evt.scale * 10000) / 100 + '%';
customScaleOption.selected = true;
@ -937,6 +1198,8 @@ window.addEventListener('pagechange', function pagechange(evt) {
}, true);
window.addEventListener('keydown', function keydown(evt) {
if (evt.ctrlKey || evt.altKey || evt.shiftKey || evt.metaKey)
return;
var curElement = document.activeElement;
if (curElement && curElement.tagName == 'INPUT')
return;