mirror of
https://github.com/mozilla/pdf.js.git
synced 2025-04-28 23:28:16 +02:00
Merge branch 'master' of github.com:andreasgal/pdf.js
This commit is contained in:
sbarman
commit
e99dad9b08
8 changed files with 704 additions and 561 deletions
124
pdf.js
124
pdf.js
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@ -50,7 +50,7 @@ function shadow(obj, prop, value) {
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var Stream = (function() {
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function constructor(arrayBuffer, start, length, dict) {
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this.bytes = new Uint8Array(arrayBuffer);
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this.bytes = Uint8Array(arrayBuffer);
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this.start = start || 0;
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this.pos = this.start;
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this.end = (start + length) || this.bytes.byteLength;
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@ -115,7 +115,7 @@ var Stream = (function() {
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var StringStream = (function() {
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function constructor(str) {
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var length = str.length;
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var bytes = new Uint8Array(length);
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var bytes = Uint8Array(length);
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for (var n = 0; n < length; ++n)
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bytes[n] = str.charCodeAt(n);
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Stream.call(this, bytes);
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@ -127,11 +127,11 @@ var StringStream = (function() {
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})();
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var FlateStream = (function() {
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const codeLenCodeMap = new Uint32Array([
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const codeLenCodeMap = Uint32Array([
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16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
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]);
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const lengthDecode = new Uint32Array([
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const lengthDecode = Uint32Array([
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0x00003, 0x00004, 0x00005, 0x00006, 0x00007, 0x00008, 0x00009,
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0x0000a, 0x1000b, 0x1000d, 0x1000f, 0x10011, 0x20013, 0x20017,
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0x2001b, 0x2001f, 0x30023, 0x3002b, 0x30033, 0x3003b, 0x40043,
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@ -139,7 +139,7 @@ var FlateStream = (function() {
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0x00102, 0x00102, 0x00102
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]);
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const distDecode = new Uint32Array([
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const distDecode = Uint32Array([
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0x00001, 0x00002, 0x00003, 0x00004, 0x10005, 0x10007, 0x20009,
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0x2000d, 0x30011, 0x30019, 0x40021, 0x40031, 0x50041, 0x50061,
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0x60081, 0x600c1, 0x70101, 0x70181, 0x80201, 0x80301, 0x90401,
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@ -147,7 +147,7 @@ var FlateStream = (function() {
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0xd4001, 0xd6001
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]);
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const fixedLitCodeTab = [new Uint32Array([
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const fixedLitCodeTab = [Uint32Array([
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0x70100, 0x80050, 0x80010, 0x80118, 0x70110, 0x80070, 0x80030,
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0x900c0, 0x70108, 0x80060, 0x80020, 0x900a0, 0x80000, 0x80080,
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0x80040, 0x900e0, 0x70104, 0x80058, 0x80018, 0x90090, 0x70114,
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@ -224,7 +224,7 @@ var FlateStream = (function() {
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0x900ff
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]), 9];
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const fixedDistCodeTab = [new Uint32Array([
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const fixedDistCodeTab = [Uint32Array([
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0x50000, 0x50010, 0x50008, 0x50018, 0x50004, 0x50014, 0x5000c,
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0x5001c, 0x50002, 0x50012, 0x5000a, 0x5001a, 0x50006, 0x50016,
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0x5000e, 0x00000, 0x50001, 0x50011, 0x50009, 0x50019, 0x50005,
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@ -300,7 +300,7 @@ var FlateStream = (function() {
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var size = 512;
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while (size < requested)
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size <<= 1;
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var buffer2 = new Uint8Array(size);
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var buffer2 = Uint8Array(size);
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for (var i = 0; i < current; ++i)
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buffer2[i] = buffer[i];
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return this.buffer = buffer2;
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@ -308,7 +308,7 @@ var FlateStream = (function() {
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getByte: function() {
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var bufferLength = this.bufferLength;
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var pos = this.pos;
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if (bufferLength == pos) {
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if (bufferLength <= pos) {
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if (this.eof)
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return;
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this.readBlock();
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@ -333,7 +333,7 @@ var FlateStream = (function() {
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lookChar: function() {
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var bufferLength = this.bufferLength;
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var pos = this.pos;
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if (bufferLength == pos) {
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if (bufferLength <= pos) {
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if (this.eof)
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return;
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this.readBlock();
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@ -365,7 +365,7 @@ var FlateStream = (function() {
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// build the table
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var size = 1 << maxLen;
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var codes = new Uint32Array(size);
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var codes = Uint32Array(size);
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for (var len = 1, code = 0, skip = 2;
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len <= maxLen;
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++len, code <<= 1, skip <<= 1) {
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@ -599,7 +599,7 @@ var PredictorStream = (function() {
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var DecryptStream = (function() {
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function constructor(str, fileKey, encAlgorithm, keyLength) {
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// TODO
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TODO("decrypt stream is not implemented");
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}
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constructor.prototype = Stream.prototype;
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@ -1385,31 +1385,25 @@ var XRef = (function() {
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var length = streamParameters.get("Length");
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var byteWidths = streamParameters.get("W");
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var range = streamParameters.get("Index");
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if (!range) {
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if (!range)
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range = [0, streamParameters.get("Size")];
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}
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var i, j;
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while (range.length > 0) {
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var first = range[0], n = range[1];
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if (!IsInt(first) || !IsInt(n)) {
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if (!IsInt(first) || !IsInt(n))
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error("Invalid XRef range fields");
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}
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var typeFieldWidth = byteWidths[0], offsetFieldWidth = byteWidths[1], generationFieldWidth = byteWidths[2];
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if (!IsInt(typeFieldWidth) || !IsInt(offsetFieldWidth) || !IsInt(generationFieldWidth)) {
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if (!IsInt(typeFieldWidth) || !IsInt(offsetFieldWidth) || !IsInt(generationFieldWidth))
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error("Invalid XRef entry fields length");
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}
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for (i = 0; i < n; ++i) {
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var type = 0, offset = 0, generation = 0;
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for (j = 0; j < typeFieldWidth; ++j) {
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for (j = 0; j < typeFieldWidth; ++j)
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type = (type << 8) | stream.getByte();
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}
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for (j = 0; j < offsetFieldWidth; ++j) {
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for (j = 0; j < offsetFieldWidth; ++j)
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offset = (offset << 8) | stream.getByte();
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}
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for (j = 0; j < generationFieldWidth; ++j) {
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for (j = 0; j < generationFieldWidth; ++j)
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generation = (generation << 8) | stream.getByte();
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}
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var entry = { offset: offset, gen: generation };
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var entry = new Ref(offset, generation);
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if (typeFieldWidth > 0) {
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switch (type) {
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case 0:
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@ -1425,16 +1419,14 @@ var XRef = (function() {
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break;
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}
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}
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if (!this.entries[first + i]) {
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if (!this.entries[first + i])
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this.entries[first + i] = entry;
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}
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}
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range.splice(0, 2);
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}
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var prev = streamParameters.get("Prev");
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if (IsInt(prev)) {
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if (IsInt(prev))
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this.readXRef(prev);
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}
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return streamParameters;
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},
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readXRef: function(startXRef) {
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@ -1475,11 +1467,12 @@ var XRef = (function() {
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e = this.getEntry(num);
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var gen = ref.gen;
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var stream, parser;
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if (e.uncompressed) {
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if (e.gen != gen)
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throw("inconsistent generation in XRef");
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var stream = this.stream.makeSubStream(e.offset);
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var parser = new Parser(new Lexer(stream), true, this);
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stream = this.stream.makeSubStream(e.offset);
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parser = new Parser(new Lexer(stream), true, this);
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var obj1 = parser.getObj();
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var obj2 = parser.getObj();
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var obj3 = parser.getObj();
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@ -1503,7 +1496,39 @@ var XRef = (function() {
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this.cache[num] = e;
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return e;
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}
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error("compressed entry");
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// compressed entry
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stream = this.fetch(new Ref(e.offset, 0));
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if (!IsStream(stream))
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error("bad ObjStm stream");
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var first = stream.parameters.get("First");
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var n = stream.parameters.get("N");
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if (!IsInt(first) || !IsInt(n)) {
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error("invalid first and n parameters for ObjStm stream");
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}
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parser = new Parser(new Lexer(stream), false);
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var i, entries = [], nums = [];
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// read the object numbers to populate cache
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for (i = 0; i < n; ++i) {
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var num = parser.getObj();
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if (!IsInt(num)) {
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error("invalid object number in the ObjStm stream");
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}
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nums.push(num);
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var offset = parser.getObj();
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if (!IsInt(offset)) {
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error("invalid object offset in the ObjStm stream");
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}
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}
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// read stream objects for cache
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for (i = 0; i < n; ++i) {
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entries.push(parser.getObj());
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this.cache[nums[i]] = entries[i];
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}
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e = entries[e.gen];
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if (!e) {
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error("bad XRef entry for compressed object");
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}
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return e;
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},
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getCatalogObj: function() {
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return this.fetch(this.root);
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@ -1534,20 +1559,39 @@ var Page = (function() {
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: null));
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},
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compile: function(gfx, fonts) {
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if (!this.code) {
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var xref = this.xref;
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var content = xref.fetchIfRef(this.content);
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var resources = xref.fetchIfRef(this.resources);
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this.code = gfx.compile(content, xref, resources, fonts);
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if (this.code) {
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// content was compiled
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return;
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}
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var xref = this.xref;
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var content;
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var resources = xref.fetchIfRef(this.resources);
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if (!IsArray(this.content)) {
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// content is not an array, shortcut
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content = xref.fetchIfRef(this.content);
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this.code = gfx.compile(content, xref, resources, fonts);
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return;
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}
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// the content is an array, compiling all items
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var i, n = this.content.length, compiledItems = [];
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for (i = 0; i < n; ++i) {
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content = xref.fetchIfRef(this.content[i]);
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compiledItems.push(gfx.compile(content, xref, resources, fonts));
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}
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// creating the function that executes all compiled items
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this.code = function(gfx) {
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var i, n = compiledItems.length;
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for (i = 0; i < n; ++i) {
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compiledItems[i](gfx);
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}
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};
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},
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display: function(gfx) {
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assert(this.code instanceof Function, "page content must be compiled first");
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var xref = this.xref;
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var content = xref.fetchIfRef(this.content);
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var resources = xref.fetchIfRef(this.resources);
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var mediaBox = xref.fetchIfRef(this.mediaBox);
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assertWellFormed(IsStream(content) && IsDict(resources),
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"invalid page content or resources");
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assertWellFormed(IsDict(resources), "invalid page 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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