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Basic function.js split

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This commit is contained in:
Yury Delendik 2014-01-27 13:50:30 -06:00
parent 59526a7cf1
commit e9327050c3
6 changed files with 218 additions and 197 deletions
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1
make.js
View File

@ -306,6 +306,7 @@ target.bundle = function(args) {
'core/image.js',
'core/metrics.js',
'core/parser.js',
'core/ps_parser.js',
'core/stream.js',
'core/worker.js',
'core/jpx.js',

212
src/core/ps_parser.js Normal file
View File

@ -0,0 +1,212 @@
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2014 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals EOF, error, Lexer */
'use strict';
var PostScriptParser = (function PostScriptParserClosure() {
function PostScriptParser(lexer) {
this.lexer = lexer;
this.operators = [];
this.token = null;
this.prev = null;
}
PostScriptParser.prototype = {
nextToken: function PostScriptParser_nextToken() {
this.prev = this.token;
this.token = this.lexer.getToken();
},
accept: function PostScriptParser_accept(type) {
if (this.token.type == type) {
this.nextToken();
return true;
}
return false;
},
expect: function PostScriptParser_expect(type) {
if (this.accept(type))
return true;
error('Unexpected symbol: found ' + this.token.type + ' expected ' +
type + '.');
},
parse: function PostScriptParser_parse() {
this.nextToken();
this.expect(PostScriptTokenTypes.LBRACE);
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
return this.operators;
},
parseBlock: function PostScriptParser_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 PostScriptParser_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 PostScriptToken_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;
this.nextChar();
}
PostScriptLexer.prototype = {
nextChar: function PostScriptLexer_nextChar() {
return (this.currentChar = this.stream.getByte());
},
getToken: function PostScriptLexer_getToken() {
var s = '';
var comment = false;
var ch = this.currentChar;
// skip comments
while (true) {
if (ch < 0) {
return EOF;
}
if (comment) {
if (ch === 0x0A || ch === 0x0D) {
comment = false;
}
} else if (ch == 0x25) { // '%'
comment = true;
} else if (!Lexer.isSpace(ch)) {
break;
}
ch = this.nextChar();
}
switch (ch | 0) {
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.'
return new PostScriptToken(PostScriptTokenTypes.NUMBER,
this.getNumber());
case 0x7B: // '{'
this.nextChar();
return PostScriptToken.LBRACE;
case 0x7D: // '}'
this.nextChar();
return PostScriptToken.RBRACE;
}
// operator
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
str += String.fromCharCode(ch);
}
switch (str.toLowerCase()) {
case 'if':
return PostScriptToken.IF;
case 'ifelse':
return PostScriptToken.IFELSE;
default:
return PostScriptToken.getOperator(str);
}
},
getNumber: function PostScriptLexer_getNumber() {
var ch = this.currentChar;
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0) {
if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
ch === 0x2D || ch === 0x2E) { // '-', '.'
str += String.fromCharCode(ch);
} else {
break;
}
}
var value = parseFloat(str);
if (isNaN(value))
error('Invalid floating point number: ' + value);
return value;
}
};
return PostScriptLexer;
})();

199
src/shared/function.js
View File

@ -14,7 +14,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals EOF, error, isArray, isBool, Lexer, info */
/* globals PostScriptLexer, PostScriptParser, error, info, isArray, isBool */
'use strict';
@ -468,9 +468,8 @@ var PostScriptStack = (function PostScriptStackClosure() {
return PostScriptStack;
})();
var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
function PostScriptEvaluator(operators, operands) {
function PostScriptEvaluator(operators) {
this.operators = operators;
this.operands = operands;
}
PostScriptEvaluator.prototype = {
execute: function PostScriptEvaluator_execute(initialStack) {
@ -698,197 +697,3 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
};
return PostScriptEvaluator;
})();
var PostScriptParser = (function PostScriptParserClosure() {
function PostScriptParser(lexer) {
this.lexer = lexer;
this.operators = [];
this.token = null;
this.prev = null;
}
PostScriptParser.prototype = {
nextToken: function PostScriptParser_nextToken() {
this.prev = this.token;
this.token = this.lexer.getToken();
},
accept: function PostScriptParser_accept(type) {
if (this.token.type == type) {
this.nextToken();
return true;
}
return false;
},
expect: function PostScriptParser_expect(type) {
if (this.accept(type))
return true;
error('Unexpected symbol: found ' + this.token.type + ' expected ' +
type + '.');
},
parse: function PostScriptParser_parse() {
this.nextToken();
this.expect(PostScriptTokenTypes.LBRACE);
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
return this.operators;
},
parseBlock: function PostScriptParser_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 PostScriptParser_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 PostScriptToken_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;
this.nextChar();
}
PostScriptLexer.prototype = {
nextChar: function PostScriptLexer_nextChar() {
return (this.currentChar = this.stream.getByte());
},
getToken: function PostScriptLexer_getToken() {
var s = '';
var comment = false;
var ch = this.currentChar;
// skip comments
while (true) {
if (ch < 0) {
return EOF;
}
if (comment) {
if (ch === 0x0A || ch === 0x0D) {
comment = false;
}
} else if (ch == 0x25) { // '%'
comment = true;
} else if (!Lexer.isSpace(ch)) {
break;
}
ch = this.nextChar();
}
switch (ch | 0) {
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.'
return new PostScriptToken(PostScriptTokenTypes.NUMBER,
this.getNumber());
case 0x7B: // '{'
this.nextChar();
return PostScriptToken.LBRACE;
case 0x7D: // '}'
this.nextChar();
return PostScriptToken.RBRACE;
}
// operator
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
str += String.fromCharCode(ch);
}
switch (str.toLowerCase()) {
case 'if':
return PostScriptToken.IF;
case 'ifelse':
return PostScriptToken.IFELSE;
default:
return PostScriptToken.getOperator(str);
}
},
getNumber: function PostScriptLexer_getNumber() {
var ch = this.currentChar;
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0) {
if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
ch === 0x2D || ch === 0x2E) { // '-', '.'
str += String.fromCharCode(ch);
} else {
break;
}
}
var value = parseFloat(str);
if (isNaN(value))
error('Invalid floating point number: ' + value);
return value;
}
};
return PostScriptLexer;
})();

1
src/worker_loader.js
View File

@ -45,6 +45,7 @@ var otherFiles = [
'core/image.js',
'core/metrics.js',
'core/parser.js',
'core/ps_parser.js',
'core/stream.js',
'core/worker.js',
'core/jpx.js',

1
test/font/font_test.html
View File

@ -33,6 +33,7 @@
<script type="text/javascript" src="../../src/core/image.js"></script>
<script type="text/javascript" src="../../src/core/metrics.js"></script>
<script type="text/javascript" src="../../src/core/parser.js"></script>
<script type="text/javascript" src="../../src/core/ps_parser.js"></script>
<script type="text/javascript" src="../../src/display/pattern_helper.js"></script>
<script type="text/javascript" src="../../src/core/stream.js"></script>
<script type="text/javascript" src="../../src/core/worker.js"></script>

1
test/unit/unit_test.html
View File

@ -33,6 +33,7 @@
<script type="text/javascript" src="../../src/core/image.js"></script>
<script type="text/javascript" src="../../src/core/metrics.js"></script>
<script type="text/javascript" src="../../src/core/parser.js"></script>
<script type="text/javascript" src="../../src/core/ps_parser.js"></script>
<script type="text/javascript" src="../../src/display/pattern_helper.js"></script>
<script type="text/javascript" src="../../src/core/stream.js"></script>
<script type="text/javascript" src="../../src/core/worker.js"></script>