Sakurai/pdf.js
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throw Error for errors, and warn in browser and shell

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This commit is contained in:
Andreas Gal 2011-05-09 18:10:15 -07:00
parent f16e6b8d1c
commit bbbf30c81f
1 changed files with 40 additions and 42 deletions
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pdf.js
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@ -1,6 +1,17 @@
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- / /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- /
/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */ /* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
function warn(msg) {
if (console && console.log)
console.log(msg);
if (print)
print(msg);
}
function error(msg) {
throw new Error(msg);
}
var Stream = (function() { var Stream = (function() {
function constructor(arrayBuffer) { function constructor(arrayBuffer) {
this.bytes = Uint8Array(arrayBuffer); this.bytes = Uint8Array(arrayBuffer);
@ -98,11 +109,11 @@ var FlateStream = (function() {
const lengthDecode = [ const lengthDecode = [
[0, 3], [0, 3],
[0, 4], [0, 4],
[0, 5}, [0, 5],
[0, 6}, [0, 6],
[0, 7}, [0, 7],
[0, 8}, [0, 8],
[0, 9}, [0, 9],
[0, 10], [0, 10],
[1, 11], [1, 11],
[1, 13], [1, 13],
@ -811,12 +822,6 @@ function IsEOF(v) {
return v == EOF; return v == EOF;
} }
var Error = {};
function IsError(v) {
return v == Error;
}
var None = {}; var None = {};
function IsNone(v) { function IsNone(v) {
@ -868,10 +873,6 @@ var Lexer = (function() {
} }
constructor.prototype = { constructor.prototype = {
error: function(msg) {
// TODO
print(msg);
},
getNumber: function(ch) { getNumber: function(ch) {
var floating = false; var floating = false;
var str = ch; var str = ch;
@ -884,7 +885,7 @@ var Lexer = (function() {
} else if (ch == "-") { } else if (ch == "-") {
// ignore minus signs in the middle of numbers to match // ignore minus signs in the middle of numbers to match
// Adobe's behavior // Adobe's behavior
this.error("Badly formated number"); warn("Badly formated number");
} else if (ch >= "0" && ch <= "9") { } else if (ch >= "0" && ch <= "9") {
str += ch; str += ch;
} else if (ch == "e" || ch == "E") { } else if (ch == "e" || ch == "E") {
@ -897,7 +898,7 @@ var Lexer = (function() {
} while (true); } while (true);
var value = parseFloat(str); var value = parseFloat(str);
if (isNaN(value)) if (isNaN(value))
return Error; error("Invalid floating point number");
return value; return value;
}, },
getString: function(ch) { getString: function(ch) {
@ -909,7 +910,7 @@ var Lexer = (function() {
do { do {
switch (ch = stream.getChar()) { switch (ch = stream.getChar()) {
case undefined: case undefined:
this.error("Unterminated string"); warn("Unterminated string");
done = true; done = true;
break; break;
case '(': case '(':
@ -926,7 +927,7 @@ var Lexer = (function() {
case '\\': case '\\':
switch (ch = stream.getChar()) { switch (ch = stream.getChar()) {
case undefined: case undefined:
this.error("Unterminated string"); warn("Unterminated string");
done = true; done = true;
break; break;
case 'n': case 'n':
@ -997,7 +998,7 @@ var Lexer = (function() {
stream.getChar(); stream.getChar();
var x2 = ToHexDigit(stream.getChar()); var x2 = ToHexDigit(stream.getChar());
if (x2 == -1) if (x2 == -1)
this.error("Illegal digit in hex char in name"); error("Illegal digit in hex char in name");
str += String.fromCharCode((x << 4) | x2); str += String.fromCharCode((x << 4) | x2);
} else { } else {
str += "#"; str += "#";
@ -1008,7 +1009,7 @@ var Lexer = (function() {
} }
} }
if (str.length > 128) if (str.length > 128)
this.error("Warning: name token is longer than allowed by the specification"); error("Warning: name token is longer than allowed by the specification");
return new Name(str); return new Name(str);
}, },
getHexString: function(ch) { getHexString: function(ch) {
@ -1019,13 +1020,13 @@ var Lexer = (function() {
if (ch == '>') { if (ch == '>') {
break; break;
} else if (!ch) { } else if (!ch) {
this.error("Unterminated hex string"); warn("Unterminated hex string");
break; break;
} else if (specialChars[ch.charCodeAt(0)] != 1) { } else if (specialChars[ch.charCodeAt(0)] != 1) {
var x, x2; var x, x2;
if (((x = ToHexDigit(ch)) == -1) || if (((x = ToHexDigit(ch)) == -1) ||
((x2 = ToHexDigit(stream.getChar())) == -1)) { ((x2 = ToHexDigit(stream.getChar())) == -1)) {
this.error("Illegal character in hex string"); error("Illegal character in hex string");
break; break;
} }
str += String.fromCharCode((x << 4) | x2); str += String.fromCharCode((x << 4) | x2);
@ -1085,7 +1086,7 @@ var Lexer = (function() {
case ')': case ')':
case '{': case '{':
case '}': case '}':
this.error("Illegal character"); error("Illegal character");
return Error; return Error;
} }
@ -1094,7 +1095,7 @@ var Lexer = (function() {
while (!!(ch = stream.lookChar()) && !specialChars[ch.charCodeAt(0)]) { while (!!(ch = stream.lookChar()) && !specialChars[ch.charCodeAt(0)]) {
stream.getChar(); stream.getChar();
if (str.length == 128) { if (str.length == 128) {
this.error("Command token too long"); error("Command token too long");
break; break;
} }
str += ch; str += ch;
@ -1166,7 +1167,7 @@ var Parser = (function() {
while (!IsCmd(this.buf1, "]") && !IsEOF(this.buf1)) while (!IsCmd(this.buf1, "]") && !IsEOF(this.buf1))
array.push(this.getObj()); array.push(this.getObj());
if (IsEOF(this.buf1)) if (IsEOF(this.buf1))
this.error("End of file inside array"); error("End of file inside array");
this.shift(); this.shift();
return array; return array;
} else if (IsCmd(this.buf1, "<<")) { // dictionary or stream } else if (IsCmd(this.buf1, "<<")) { // dictionary or stream
@ -1174,18 +1175,18 @@ var Parser = (function() {
var dict = new Dict(); var dict = new Dict();
while (!IsCmd(this.buf1, ">>") && !IsEOF(this.buf1)) { while (!IsCmd(this.buf1, ">>") && !IsEOF(this.buf1)) {
if (!IsName(this.buf1)) { if (!IsName(this.buf1)) {
this.error("Dictionary key must be a name object"); error("Dictionary key must be a name object");
shift(); shift();
} else { } else {
var key = this.buf1.name; var key = this.buf1.name;
this.shift(); this.shift();
if (IsEOF(this.buf1) || IsError(this.buf1)) if (IsEOF(this.buf1))
break; break;
dict.set(key, this.getObj()); dict.set(key, this.getObj());
} }
} }
if (IsEOF(this.buf1)) if (IsEOF(this.buf1))
this.error("End of file inside dictionary"); error("End of file inside dictionary");
// stream objects are not allowed inside content streams or // stream objects are not allowed inside content streams or
// object streams // object streams
@ -1235,7 +1236,7 @@ var Parser = (function() {
// get length // get length
var length; var length;
if (!IsInt(length = dict.get("Length"))) { if (!IsInt(length = dict.get("Length"))) {
this.error("Bad 'Length' attribute in stream"); error("Bad 'Length' attribute in stream");
lenght = 0; lenght = 0;
} }
@ -1244,7 +1245,7 @@ var Parser = (function() {
this.shift(); // '>>' this.shift(); // '>>'
this.shift(); // 'stream' this.shift(); // 'stream'
if (!IsCmd(this.buf1, "endstream")) if (!IsCmd(this.buf1, "endstream"))
this.error("Missing 'endstream'"); error("Missing 'endstream'");
this.shift(); this.shift();
stream = stream.makeSubStream(pos, length); stream = stream.makeSubStream(pos, length);
@ -1266,7 +1267,7 @@ var Parser = (function() {
var paramsArray = params; var paramsArray = params;
for (filter in filterArray) { for (filter in filterArray) {
if (!IsName(filter)) if (!IsName(filter))
this.error("Bad filter name"); error("Bad filter name");
else { else {
params = null; params = null;
if (IsArray(paramsArray) && (i in paramsArray)) if (IsArray(paramsArray) && (i in paramsArray))
@ -1312,7 +1313,7 @@ var Linearization = (function() {
obj > 0) { obj > 0) {
return obj; return obj;
} }
this.error("'" + name + "' field in linearization table is invalid"); error("'" + name + "' field in linearization table is invalid");
return 0; return 0;
}, },
getHint: function(index) { getHint: function(index) {
@ -1325,7 +1326,7 @@ var Linearization = (function() {
obj2 > 0) { obj2 > 0) {
return obj2; return obj2;
} }
this.error("Hints table in linearization table is invalid"); error("Hints table in linearization table is invalid");
return 0; return 0;
}, },
get length() { get length() {
@ -1640,22 +1641,19 @@ var Interpreter = (function() {
var fn = map[cmd]; var fn = map[cmd];
if (fn) { if (fn) {
if (fn.length != args.length) if (fn.length != args.length)
this.error("Invalid number of arguments '" + cmd + "'"); error("Invalid number of arguments '" + cmd + "'");
fn.apply(gfx, args); fn.apply(gfx, args);
} else } else
this.error("Unknown command '" + cmd + "'"); error("Unknown command '" + cmd + "'");
args.length = 0; args.length = 0;
} else { } else {
if (args.length > 33) if (args.length > 33)
this.error("Too many arguments '" + cmd + "'"); error("Too many arguments '" + cmd + "'");
args.push(obj); args.push(obj);
} }
} }
this.gfx.endDrawing(); this.gfx.endDrawing();
}, }
error: function(what) {
throw new Error(what);
},
}; };
return constructor; return constructor;
@ -1935,7 +1933,7 @@ var CanvasGraphics = (function() {
} else if (IsString(e)) { } else if (IsString(e)) {
this.showText(e); this.showText(e);
} else { } else {
this.error("Unexpected element in TJ array"); error("Unexpected element in TJ array");
} }
} }
}, },