-var EOF = -1;
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- /
+/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
+
+var HashMap = (function() {
+ function constructor() {
+ }
+
+ constructor.prototype = {
+ get: function(key) {
+ return this["$" + key];
+ },
+ set: function(key, value) {
+ this["$" + key] = value;
+ },
+ contains: function(key) {
+ return ("$" + key) in this;
+ }
+ };
+
+ return constructor;
+})();
var Obj = (function() {
function constructor(type, value) {
- this.type = type;
- this.value = value;
+ this.type = type;
+ this.value = value;
}
constructor.prototype = {
};
var types = [
- "Bool", "Int", "Real", "String", "Name", "Null",
- "Array", "Dict", "Stream", "Ref",
- "Cmd", "Error", "EOF", "None"
- ];
+ "Bool", "Int", "Real", "String", "Name", "Null",
+ "Array", "Dict", "Stream", "Ref",
+ "Cmd", "Error", "EOF", "None"
+ ];
for (var i = 0; i < types.length; ++i) {
- var typeName = types[i];
- constructor[typeName] = i;
- constructor.prototype["is" + typeName] =
- (function (value) {
- return this.type == i &&
- (typeof value == "undefined" || value == this.value);
- });
+ var typeName = types[i];
+ constructor[typeName] = i;
+ constructor.prototype["is" + typeName] =
+ (function (value) {
+ return this.type == i &&
+ (typeof value == "undefined" || value == this.value);
+ });
}
constructor.prototype.lookup = function(key) {
- function lookup(key) {
- if (!(this.value.contains(key)))
- return Obj.nullObj;
- return this.value.get(key);
- }
+ function lookup(key) {
+ if (!(this.value.contains(key)))
+ return Obj.nullObj;
+ return this.value.get(key);
+ }
}
Object.freeze(constructor.trueObj = new constructor(constructor.Bool, true));
return constructor;
})();
-var HashMap = (function() {
- function constructor() {
- }
-
- constructor.prototype = {
- get: function(key) {
- return this["$" + key];
- },
- set: function(key, value) {
- this["$" + key] = value;
- },
- contains: function(key) {
- return ("$" + key) in this;
- }
- };
-
- return constructor;
-})();
-
var Lexer = (function() {
+ const EOF = -1;
+
function constructor(bytes) {
- this.bytes = bytes;
- this.pos = 0;
+ this.bytes = bytes;
+ this.pos = 0;
}
// A '1' in this array means the character is white space. A '1' or
// '2' means the character ends a name or command.
var specialChars = [
1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, // 0x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x
- 1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, // 2x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, // 3x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 5x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 6x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 7x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ax
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // bx
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // cx
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // dx
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ex
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // fx
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x
+ 1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, // 2x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, // 3x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 5x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 6x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 7x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ax
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // bx
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // cx
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // dx
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ex
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // fx
];
const MIN_INT = (1<<31) | 0;
const MAX_UINT = ((1<<30) * 4) - 1;
function ToHexDigit(ch) {
- if (ch >= "0" && ch <= "9")
- return ch - "0";
- ch = ch.toLowerCase();
- if (ch >= "a" && ch <= "f")
- return ch - "a";
- return -1;
+ if (ch >= "0" && ch <= "9")
+ return ch - "0";
+ ch = ch.toLowerCase();
+ if (ch >= "a" && ch <= "f")
+ return ch - "a";
+ return -1;
}
constructor.prototype = {
- error: function(msg) {
- },
- lookChar: function() {
- var bytes = this.bytes;
- if (this.pos >= bytes.length)
- return EOF;
- return String.fromCharCode(bytes[this.pos]);
- },
- getChar: function() {
- var ch = this.lookChar();
- this.pos++:
- return ch;
- },
- putBack(): function() {
- this.pos--;
- },
- skipChar(): function() {
- this.pos++;
- },
- getNumber: function(ch) {
+ error: function(msg) {
+ },
+ lookChar: function() {
+ var bytes = this.bytes;
+ if (this.pos >= bytes.length)
+ return EOF;
+ return String.fromCharCode(bytes[this.pos]);
+ },
+ getChar: function() {
+ var ch = this.lookChar();
+ this.pos++:
+ return ch;
+ },
+ putBack(): function() {
+ this.pos--;
+ },
+ skipChar(): function() {
+ this.pos++;
+ },
+ getNumber: function(ch) {
var floating = false;
- var str = ch;
- do {
- ch = this.getChar();
- if (ch == "." && !floating) {
- str += ch;
- floating = true;
- } else if (ch == "-") {
- // ignore minus signs in the middle of numbers to match
- // Adobe's behavior
- this.error("Badly formated number");
- } else if (ch >= "0" && ch <= "9") {
- str += ch;
- } else if (ch == "e" || ch == "E") {
- floating = true;
- } else {
- // put back the last character, it doesn't belong to us
- this.putBack();
- break;
- }
- } while (true);
- var value = parseNumber(str);
- if (isNaN(value))
- return Obj.errorObj;
- if (floating) {
- type = Obj.Floating;
- } else {
- if (value >= MIN_INT && value <= MAX_INT)
- type = Obj.Int;
- else if (value >= MAX_UINT && value <= MAX_UINT)
- type = Obj.Uint;
- else
- return Obj.errorObj;
- }
- return new Obj(type, value);
+ var str = ch;
+ do {
+ ch = this.getChar();
+ if (ch == "." && !floating) {
+ str += ch;
+ floating = true;
+ } else if (ch == "-") {
+ // ignore minus signs in the middle of numbers to match
+ // Adobe's behavior
+ this.error("Badly formated number");
+ } else if (ch >= "0" && ch <= "9") {
+ str += ch;
+ } else if (ch == "e" || ch == "E") {
+ floating = true;
+ } else {
+ // put back the last character, it doesn't belong to us
+ this.putBack();
+ break;
+ }
+ } while (true);
+ var value = parseNumber(str);
+ if (isNaN(value))
+ return Obj.errorObj;
+ if (floating) {
+ type = Obj.Floating;
+ } else {
+ if (value >= MIN_INT && value <= MAX_INT)
+ type = Obj.Int;
+ else if (value >= MAX_UINT && value <= MAX_UINT)
+ type = Obj.Uint;
+ else
+ return Obj.errorObj;
+ }
+ return new Obj(type, value);
+ },
+ getString: function(ch) {
+ var n = 0;
+ var numParent = 1;
+ var done = false;
+ var str = ch;
+ do {
+ switch (ch = this.getChar()) {
+ case EOF:
+ this.error("Unterminated string");
+ done = true;
+ break;
+ case '(':
+ ++numParen;
+ str += ch;
+ break;
+ case ')':
+ if (--numParen == 0) {
+ done = true;
+ } else {
+ str += ch;
+ }
+ break;
+ case '\\':
+ switch (ch = this.getChar()) {
+ case 'n':
+ str += '\n';
+ break;
+ case 'r':
+ str += '\r';
+ break;
+ case 't':
+ str += '\t';
+ break;
+ case 'b':
+ str += '\b';
+ break;
+ case 'f':
+ str += '\f';
+ break;
+ case '\\':
+ case '(':
+ case ')':
+ str += c;
+ break;
+ case '0': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7':
+ var x = ch - '0';
+ ch = this.lookChar();
+ if (ch >= '0' && ch <= '7') {
+ this.getChar();
+ x = (x << 3) + (x - '0');
+ ch = this.lookChar();
+ if (ch >= '0' && ch <= '7') {
+ getChar();
+ x = (x << 3) + (x - '0');
+ }
+ }
+ str += String.fromCharCode(x);
+ break;
+ case '\r':
+ ch = this.lookChar();
+ if (ch == '\n') {
+ this.getChar();
+ }
+ break;
+ case '\n':
+ break;
+ case EOF:
+ this.error("Unterminated string");
+ done = true;
+ break;
+ default:
+ str += ch;
+ break;
+ }
+ break;
+ default:
+ str += ch;
+ break;
+ }
+ } while (!done);
+ if (!str.length)
+ return new Obj(Obj.EOF);
+ return new Obj(Obj.String, str);
},
- getString: function(ch) {
- var n = 0;
- var numParent = 1;
- var done = false;
- var str = ch;
- do {
- switch (ch = this.getChar()) {
- case EOF:
- this.error("Unterminated string");
- done = true;
- break;
- case '(':
- ++numParen;
- str += ch;
- break;
- case ')':
- if (--numParen == 0) {
- done = true;
- } else {
- str += ch;
- }
- break;
- case '\\':
- switch (ch = this.getChar()) {
- case 'n':
- str += '\n';
- break;
- case 'r':
- str += '\r';
- break;
- case 't':
- str += '\t';
- break;
- case 'b':
- str += '\b';
- break;
- case 'f':
- str += '\f';
- break;
- case '\\':
- case '(':
- case ')':
- str += c;
- break;
- case '0': case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- var x = ch - '0';
- ch = this.lookChar();
- if (ch >= '0' && ch <= '7') {
- this.getChar();
- x = (x << 3) + (x - '0');
- ch = this.lookChar();
- if (ch >= '0' && ch <= '7') {
- getChar();
- x = (x << 3) + (x - '0');
- }
- }
- str += String.fromCharCode(x);
- break;
- case '\r':
- ch = this.lookChar();
- if (ch == '\n') {
- this.getChar();
- }
- break;
- case '\n':
- break;
- case EOF:
- this.error("Unterminated string");
- done = true;
- break;
- default:
- str += ch;
- break;
- }
- break;
-
- default:
- str += ch;
- break;
- }
- } while (!done);
- if (!str.length)
- return new Obj(Obj.EOF);
- return new Obj(Obj.String, str);
- },
- getName: function(ch) {
- var str = "";
- while ((ch = this.lookChar()) != EOF && !specialChars[ch.toCharCode()]) {
- this.getChar();
- if (ch == "#") {
- ch = this.lookChar();
- var x = ToHexDigit(ch);
- if (x != -1) {
- this.getChar();
- var x2 = ToHexDigit(this.getChar());
- if (x2 == -1)
- this.error("Illegal digit in hex char in name");
- str += String.fromCharCode((x << 4) | x2);
- } else {
- str += "#";
- str += ch;
- }
- } else {
- str += ch;
- }
- }
- if (str.length > 128)
- this.error("Warning: name token is longer than allowed by the specification");
- return new Obj(Obj.Name, str);
- },
- getHexString: function(ch) {
- var str = "";
- while (1) {
- ch = this.getChar();
- if (ch == '>') {
- break;
- } else if (ch == EOF) {
- this.error("Unterminated hex string");
- break;
- } else if (specialChars[ch.toCharCode()] != 1) {
- var x, x2;
- if (((x = ToHexDigit(ch)) == -1) ||
- ((x2 = ToHexDigit(this.getChar())) == -1)) {
- error("Illegal character in hex string");
- break;
- }
- str += String.fromCharCode((x << 4) | x2);
- }
- }
- return new Obj(Obj.String, str);
- },
- getObj: function() {
- // skip whitespace and comments
- var comment = false;
- while (true) {
- var ch;
- if ((ch = this.getChar()) == EOF)
- return new Obj(Object.EOF);
- if (comment) {
- if (ch == '\r' || ch == '\n')
- comment = false;
- } else if (ch == '%') {
- comment = true;
- } else if (specialChars[ch.chatCodeAt(0)] != 1) {
- break;
- }
- }
-
- // start reading token
- switch (c) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- case '+': case '-': case '.':
- return this.getNumber(ch);
- case '(':
- return this.getString(ch);
- case '/':
- return this.getName(ch);
- // array punctuation
- case '[':
- case ']':
- return new Obj(Obj.Cmd, ch);
- // hex string or dict punctuation
- case '<':
- ch = this.lookChar();
- if (ch == '<') {
- // dict punctuation
- this.getChar();
- return new Obj(Obj.Cmd, ch);
- }
- return this.getHexString(ch);
- // dict punctuation
- case '>':
- ch = this.lookChar();
- if (ch == '>') {
- this.getChar();
- return new Obj(Obj.Cmd, ch);
- }
+ getName: function(ch) {
+ var str = "";
+ while ((ch = this.lookChar()) != EOF && !specialChars[ch.toCharCode()]) {
+ this.getChar();
+ if (ch == "#") {
+ ch = this.lookChar();
+ var x = ToHexDigit(ch);
+ if (x != -1) {
+ this.getChar();
+ var x2 = ToHexDigit(this.getChar());
+ if (x2 == -1)
+ this.error("Illegal digit in hex char in name");
+ str += String.fromCharCode((x << 4) | x2);
+ } else {
+ str += "#";
+ str += ch;
+ }
+ } else {
+ str += ch;
+ }
+ }
+ if (str.length > 128)
+ this.error("Warning: name token is longer than allowed by the specification");
+ return new Obj(Obj.Name, str);
+ },
+ getHexString: function(ch) {
+ var str = "";
+ while (1) {
+ ch = this.getChar();
+ if (ch == '>') {
+ break;
+ } else if (ch == EOF) {
+ this.error("Unterminated hex string");
+ break;
+ } else if (specialChars[ch.toCharCode()] != 1) {
+ var x, x2;
+ if (((x = ToHexDigit(ch)) == -1) ||
+ ((x2 = ToHexDigit(this.getChar())) == -1)) {
+ error("Illegal character in hex string");
+ break;
+ }
+ str += String.fromCharCode((x << 4) | x2);
+ }
+ }
+ return new Obj(Obj.String, str);
+ },
+ getObj: function() {
+ // skip whitespace and comments
+ var comment = false;
+ while (true) {
+ var ch;
+ if ((ch = this.getChar()) == EOF)
+ return new Obj(Object.EOF);
+ if (comment) {
+ if (ch == '\r' || ch == '\n')
+ comment = false;
+ } else if (ch == '%') {
+ comment = true;
+ } else if (specialChars[ch.chatCodeAt(0)] != 1) {
+ break;
+ }
+ }
+
+ // start reading token
+ switch (c) {
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ case '+': case '-': case '.':
+ return this.getNumber(ch);
+ case '(':
+ return this.getString(ch);
+ case '/':
+ return this.getName(ch);
+ // array punctuation
+ case '[':
+ case ']':
+ return new Obj(Obj.Cmd, ch);
+ // hex string or dict punctuation
+ case '<':
+ ch = this.lookChar();
+ if (ch == '<') {
+ // dict punctuation
+ this.getChar();
+ return new Obj(Obj.Cmd, ch);
+ }
+ return this.getHexString(ch);
+ // dict punctuation
+ case '>':
+ ch = this.lookChar();
+ if (ch == '>') {
+ this.getChar();
+ return new Obj(Obj.Cmd, ch);
+ }
// fall through
- case ')':
- case '{':
- case '}':
- this.error("Illegal character");
- return Obj.errorObj;
- }
-
- // command
- var str = ch;
- while ((ch = this.lookChar()) != EOF && !specialChars[ch.toCharCode()]) {
- getChar();
- if (str.length == 128) {
- error("Command token too long");
- break;
- }
- str += ch;
- }
- if (str == "true")
- return Obj.trueObj;
- if (str == "false")
- return Obj.falseObj;
- if (str == "null")
- return Obj.nullObj;
- return new Obj(Obj.Cmd, str);
- }
+ case ')':
+ case '{':
+ case '}':
+ this.error("Illegal character");
+ return Obj.errorObj;
+ }
+
+ // command
+ var str = ch;
+ while ((ch = this.lookChar()) != EOF && !specialChars[ch.toCharCode()]) {
+ getChar();
+ if (str.length == 128) {
+ error("Command token too long");
+ break;
+ }
+ str += ch;
+ }
+ if (str == "true")
+ return Obj.trueObj;
+ if (str == "false")
+ return Obj.falseObj;
+ if (str == "null")
+ return Obj.nullObj;
+ return new Obj(Obj.Cmd, str);
+ }
};
Object.freeze(constructor.prototype);
var Parser = (function() {
function constructor(lexer, allowStreams) {
- this.lexer = lexer;
- this.allowStreams = allowStreams;
- this.inlineImg = 0;
- this.refill();
+ this.lexer = lexer;
+ this.allowStreams = allowStreams;
+ this.inlineImg = 0;
+ this.refill();
}
constructor.prototype = {
- refill: function() {
- this.buf1 = lexer.getObj();
- this.buf2 = lexer.getObj();
- }
- shift: function() {
- if (this.inlineImg > 0) {
- if (this.inlineImg < 2) {
- this.inlineImg++;
- } else {
- // in a damaged content stream, if 'ID' shows up in the middle
- // of a dictionary, we need to reset
- this.inlineImg = 0;
- }
- } else if (this.buf2.isCmd("ID")) {
- this.lexer.skipChar(); // skip char after 'ID' command
- this.inlineImg = 1;
- }
- this.buf1 = this.buf2;
- // don't buffer inline image data
- this.buf2 = (this.inlineImg > 0) ? Obj.nullObj : this.lexer.getObj();
- },
- getObj: function() {
- // refill buffer after inline image data
- if (this.inlineImg == 2)
- this.refill();
-
- // array
- if (this.buf1.isCmd("[")) {
- var obj = new Obj(Obj.Array, []);
- while (!this.buf1.isCmd("]") && !this.buf1.isEOF())
- obj.value.push(this.getObj());
- if (this.buf1.isEOF())
- this.error("End of file inside array");
- this.shift();
- return obj;
-
- // dictionary or stream
- } else if (this.buf1.isCmd("<<")) {
- this.shift();
- var obj = new Obj(Obj.Dict, new HashMap());
- while (!this.buf1.isCmd(">>") && !this.buf1.isEOF()) {
- if (!this.buf1.isName()) {
- error("Dictionary key must be a name object");
- shift();
- } else {
- var key = buf1.value;
- this.shift();
- if (this.buf1.isEOF() || this.buf1.isError())
- break;
- obj.value.set(key, this.getObj());
- }
- }
- if (this.buf1.isEOF())
- error("End of file inside dictionary");
- // stream objects are not allowed inside content streams or
- // object streams
- if (this.allowStreams && this.buf2.isCmd("stream")) {
- return this.makeStream();
- } else {
- this.shift();
- }
- return obj;
-
- // indirect reference or integer
- } else if (this.buf1.isInt()) {
- var num = this.buf1.value;
- this.shift();
- if (this.buf1.isInt() && this.buf2.isCmd("R")) {
- var obj = new Obj(Obj.Ref, [num, this.buf1.value]);
- this.shift();
- this.shift();
- return obj;
- }
- return new Obj(Obj.Int, num);
-
- // string
- } else if (this.buf1.isString()) {
- var obj = this.decrypt(this.buf1);
- this.shift();
- return obj;
- }
+ refill: function() {
+ this.buf1 = lexer.getObj();
+ this.buf2 = lexer.getObj();
+ }
+ shift: function() {
+ if (this.inlineImg > 0) {
+ if (this.inlineImg < 2) {
+ this.inlineImg++;
+ } else {
+ // in a damaged content stream, if 'ID' shows up in the middle
+ // of a dictionary, we need to reset
+ this.inlineImg = 0;
+ }
+ } else if (this.buf2.isCmd("ID")) {
+ this.lexer.skipChar(); // skip char after 'ID' command
+ this.inlineImg = 1;
+ }
+ this.buf1 = this.buf2;
+ // don't buffer inline image data
+ this.buf2 = (this.inlineImg > 0) ? Obj.nullObj : this.lexer.getObj();
+ },
+ getObj: function() {
+ // refill buffer after inline image data
+ if (this.inlineImg == 2)
+ this.refill();
+
+ if (this.buf1.isCmd("[")) { // array
+ var obj = new Obj(Obj.Array, []);
+ while (!this.buf1.isCmd("]") && !this.buf1.isEOF())
+ obj.value.push(this.getObj());
+ if (this.buf1.isEOF())
+ this.error("End of file inside array");
+ this.shift();
+ return obj;
+ } else if (this.buf1.isCmd("<<")) { // dictionary or stream
+ this.shift();
+ var obj = new Obj(Obj.Dict, new HashMap());
+ while (!this.buf1.isCmd(">>") && !this.buf1.isEOF()) {
+ if (!this.buf1.isName()) {
+ error("Dictionary key must be a name object");
+ shift();
+ } else {
+ var key = buf1.value;
+ this.shift();
+ if (this.buf1.isEOF() || this.buf1.isError())
+ break;
+ obj.value.set(key, this.getObj());
+ }
+ }
+ if (this.buf1.isEOF())
+ error("End of file inside dictionary");
+
+ // stream objects are not allowed inside content streams or
+ // object streams
+ if (this.allowStreams && this.buf2.isCmd("stream")) {
+ return this.makeStream();
+ } else {
+ this.shift();
+ }
+ return obj;
+
+ } else if (this.buf1.isInt()) { // indirect reference or integer
+ var num = this.buf1.value;
+ this.shift();
+ if (this.buf1.isInt() && this.buf2.isCmd("R")) {
+ var obj = new Obj(Obj.Ref, [num, this.buf1.value]);
+ this.shift();
+ this.shift();
+ return obj;
+ }
+ return new Obj(Obj.Int, num);
+ } else if (this.buf1.isString()) { // string
+ var obj = this.decrypt(this.buf1);
+ this.shift();
+ return obj;
+ }
- // simple object
- var obj = this.buf1;
- this.shift();
- return obj;
- },
- decrypt: function(obj) {
- // TODO
- return obj;
- },
- makeStream: function() {
- // TODO
- return new Obj(Obj.Error);
- }
+ // simple object
+ var obj = this.buf1;
+ this.shift();
+ return obj;
+ },
+ decrypt: function(obj) {
+ // TODO
+ return obj;
+ },
+ makeStream: function() {
+ // TODO
+ return new Obj(Obj.Error);
+ }
};
Object.freeze(constructor.prototype);
var Linearization = (function () {
function constructor(bytes) {
- this.parser = new Parser(new Lexer(bytes), false);
- var obj1 = this.parser.getObj();
- var obj2 = this.parser.getObj();
- var obj3 = this.parser.getObj();
- this.linDict = this.parser.getObj();
- if (obj1.isInt() && obj2.isInt() && obj3.isCmd("obj") && linDict.isDict()) {
- var obj = linDict.lookup("Linearized");
- if (!(obj.isNum() && obj.value > 0))
- this.linDict = Obj.nullObj;
- }
+ this.parser = new Parser(new Lexer(bytes), false);
+ var obj1 = this.parser.getObj();
+ var obj2 = this.parser.getObj();
+ var obj3 = this.parser.getObj();
+ this.linDict = this.parser.getObj();
+ if (obj1.isInt() && obj2.isInt() && obj3.isCmd("obj") && linDict.isDict()) {
+ var obj = linDict.lookup("Linearized");
+ if (!(obj.isNum() && obj.value > 0))
+ this.linDict = Obj.nullObj;
+ }
}
constructor.prototype = {
- function getInt(name) {
- var linDict = this.linDict;
- var obj;
- if (!linDict.isDict() &&
- (obj = linDict.lookup(name)).isInt() &&
- obj.value > 0) {
- return length;
- }
- error("'" + name + "' field in linearization table is invalid");
- return 0;
- },
- function getHint(index) {
- var linDict = this.linDict;
- var obj1, obj2;
- if (linDict.isDict() &&
- (obj1 = linDict.lookup("H")).isArray() &&
- obj1.value.length >= 2 &&
- (obj2 = obj1.value[index]).isInt() &&
- obj2.value > 0) {
- return obj2.value;
- }
- this.error("Hints table in linearization table is invalid");
- return 0;
- },
- get length() {
- return this.getInt("L");
- },
- get hintsOffset() {
- return this.getHint(0);
- },
- get hintsLength() {
- return this.getHint(1);
- },
- get hintsOffset2() {
- return this.getHint(2);
- },
- get hintsLenth2() {
- return this.getHint(3);
- },
- get objectNumberFirst() {
- return this.getInt("O");
- },
- get endFirst() {
- return this.getInt("E");
- },
- get numPages() {
- return this.getInt("N");
- },
- get mainXRefEntriesOffset() {
- return this.getInt("T");
- },
- get pageFirst() {
- return this.getInt("P");
- }
- };
+ function getInt(name) {
+ var linDict = this.linDict;
+ var obj;
+ if (!linDict.isDict() &&
+ (obj = linDict.lookup(name)).isInt() &&
+ obj.value > 0) {
+ return length;
+ }
+ error("'" + name + "' field in linearization table is invalid");
+ return 0;
+ },
+ function getHint(index) {
+ var linDict = this.linDict;
+ var obj1, obj2;
+ if (linDict.isDict() &&
+ (obj1 = linDict.lookup("H")).isArray() &&
+ obj1.value.length >= 2 &&
+ (obj2 = obj1.value[index]).isInt() &&
+ obj2.value > 0) {
+ return obj2.value;
+ }
+ this.error("Hints table in linearization table is invalid");
+ return 0;
+ },
+ get length() {
+ return this.getInt("L");
+ },
+ get hintsOffset() {
+ return this.getHint(0);
+ },
+ get hintsLength() {
+ return this.getHint(1);
+ },
+ get hintsOffset2() {
+ return this.getHint(2);
+ },
+ get hintsLenth2() {
+ return this.getHint(3);
+ },
+ get objectNumberFirst() {
+ return this.getInt("O");
+ },
+ get endFirst() {
+ return this.getInt("E");
+ },
+ get numPages() {
+ return this.getInt("N");
+ },
+ get mainXRefEntriesOffset() {
+ return this.getInt("T");
+ },
+ get pageFirst() {
+ return this.getInt("P");
+ }
+ };
})();
var linearization;
var skip = 0;
var header = "%PDF-";
while (skip < headerSearchSize) {
- for (var i = 0; i < header.length; ++i)
- if (stream[skip+i] != header.charCodeAt(i))
- break;
-
- // Found the header, trim off any garbage before it.
- if (i == header.length) {
- stream = new Uint8Array(arrayBuffer, skip);
- return;
- }
+ for (var i = 0; i < header.length; ++i)
+ if (stream[skip+i] != header.charCodeAt(i))
+ break;
+
+ // Found the header, trim off any garbage before it.
+ if (i == header.length) {
+ stream = new Uint8Array(arrayBuffer, skip);
+ return;
+ }
}
// May not be a PDF file, continue anyway.
function setup(arrayBuffer, ownerPassword, userPassword) {
var ub = checkHeader(arrayBuffer);
}
-
-})
\ No newline at end of file
projects / pdf.js.git / commitdiff