mirror of
https://github.com/mozilla/pdf.js.git
synced 2025-04-26 10:08:06 +02:00
Load all resources before getOperatorList/getTextContent.
This commit is contained in:
Brendan Dahl
parent
8e1db0bb7c
commit
01ce3d056c
5 changed files with 684 additions and 448 deletions
673
src/evaluator.js
673
src/evaluator.js
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@ -540,9 +540,6 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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try {
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translated = this.translateFont(font, xref);
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} catch (e) {
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if (e instanceof MissingDataException) {
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throw e;
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}
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translated = new ErrorFont(e instanceof Error ? e.message : e);
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}
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font.translated = translated;
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@ -611,221 +608,208 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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var parser = new Parser(new Lexer(stream, OP_MAP), false, xref);
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var promise = new Promise();
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function parseCommands() {
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try {
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parser.restoreState();
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var args = [];
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while (true) {
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var args = [];
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while (true) {
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var obj = parser.getObj();
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var obj = parser.getObj();
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if (isEOF(obj)) {
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break;
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if (isEOF(obj)) {
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break;
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}
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if (isCmd(obj)) {
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var cmd = obj.cmd;
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// Check that the command is valid
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var opSpec = OP_MAP[cmd];
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if (!opSpec) {
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warn('Unknown command "' + cmd + '"');
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continue;
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}
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var fn = opSpec.fnName;
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// Validate the number of arguments for the command
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if (opSpec.variableArgs) {
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if (args.length > opSpec.numArgs) {
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info('Command ' + fn + ': expected [0,' + opSpec.numArgs +
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'] args, but received ' + args.length + ' args');
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}
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} else {
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if (args.length < opSpec.numArgs) {
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// If we receive too few args, it's not possible to possible
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// to execute the command, so skip the command
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info('Command ' + fn + ': because expected ' +
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opSpec.numArgs + ' args, but received ' + args.length +
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' args; skipping');
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args = [];
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continue;
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} else if (args.length > opSpec.numArgs) {
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info('Command ' + fn + ': expected ' + opSpec.numArgs +
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' args, but received ' + args.length + ' args');
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}
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}
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if (isCmd(obj)) {
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var cmd = obj.cmd;
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// TODO figure out how to type-check vararg functions
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// Check that the command is valid
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var opSpec = OP_MAP[cmd];
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if (!opSpec) {
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warn('Unknown command "' + cmd + '"');
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continue;
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}
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if ((cmd == 'SCN' || cmd == 'scn') &&
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!args[args.length - 1].code) {
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// compile tiling patterns
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var patternName = args[args.length - 1];
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// SCN/scn applies patterns along with normal colors
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var pattern;
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if (isName(patternName) &&
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(pattern = patterns.get(patternName.name))) {
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var fn = opSpec.fnName;
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var dict = isStream(pattern) ? pattern.dict : pattern;
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var typeNum = dict.get('PatternType');
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// Validate the number of arguments for the command
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if (opSpec.variableArgs) {
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if (args.length > opSpec.numArgs) {
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info('Command ' + fn + ': expected [0,' + opSpec.numArgs +
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'] args, but received ' + args.length + ' args');
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}
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} else {
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if (args.length < opSpec.numArgs) {
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// If we receive too few args, it's not possible to possible
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// to execute the command, so skip the command
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info('Command ' + fn + ': because expected ' +
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opSpec.numArgs + ' args, but received ' + args.length +
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' args; skipping');
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args = [];
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continue;
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} else if (args.length > opSpec.numArgs) {
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info('Command ' + fn + ': expected ' + opSpec.numArgs +
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' args, but received ' + args.length + ' args');
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}
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}
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// TODO figure out how to type-check vararg functions
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if ((cmd == 'SCN' || cmd == 'scn') &&
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!args[args.length - 1].code) {
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// compile tiling patterns
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var patternName = args[args.length - 1];
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// SCN/scn applies patterns along with normal colors
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var pattern;
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if (isName(patternName) &&
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(pattern = patterns.get(patternName.name))) {
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var dict = isStream(pattern) ? pattern.dict : pattern;
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var typeNum = dict.get('PatternType');
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if (typeNum == TILING_PATTERN) {
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var patternPromise = self.handleTilingType(
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fn, args, resources, pattern, dict);
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fn = 'promise';
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args = [patternPromise];
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} else if (typeNum == SHADING_PATTERN) {
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var shading = dict.get('Shading');
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var matrix = dict.get('Matrix');
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var pattern = Pattern.parseShading(shading, matrix, xref,
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resources);
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args = pattern.getIR();
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} else {
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error('Unkown PatternType ' + typeNum);
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}
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}
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} else if (cmd == 'Do' && !args[0].code) {
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// eagerly compile XForm objects
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var name = args[0].name;
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var xobj = xobjs.get(name);
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if (xobj) {
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assertWellFormed(
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isStream(xobj), 'XObject should be a stream');
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var type = xobj.dict.get('Subtype');
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assertWellFormed(
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isName(type),
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'XObject should have a Name subtype'
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);
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if ('Form' == type.name) {
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fn = 'promise';
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args = [self.buildFormXObject(resources, xobj)];
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} else if ('Image' == type.name) {
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var data = self.buildPaintImageXObject(
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resources, xobj, false);
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Util.extendObj(dependencies, data.dependencies);
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self.insertDependencies(queue, data.dependencies);
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fn = data.fn;
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args = data.args;
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} else {
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error('Unhandled XObject subtype ' + type.name);
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}
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}
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} else if (cmd == 'Tf') { // eagerly collect all fonts
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if (typeNum == TILING_PATTERN) {
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var patternPromise = self.handleTilingType(
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fn, args, resources, pattern, dict);
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fn = 'promise';
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args = [self.handleSetFont(resources, args)];
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} else if (cmd == 'EI') {
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args = [patternPromise];
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} else if (typeNum == SHADING_PATTERN) {
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var shading = dict.get('Shading');
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var matrix = dict.get('Matrix');
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var pattern = Pattern.parseShading(shading, matrix, xref,
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resources);
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args = pattern.getIR();
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} else {
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error('Unkown PatternType ' + typeNum);
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}
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}
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} else if (cmd == 'Do' && !args[0].code) {
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// eagerly compile XForm objects
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var name = args[0].name;
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var xobj = xobjs.get(name);
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if (xobj) {
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assertWellFormed(
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isStream(xobj), 'XObject should be a stream');
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var type = xobj.dict.get('Subtype');
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assertWellFormed(
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isName(type),
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'XObject should have a Name subtype'
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);
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if ('Form' == type.name) {
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fn = 'promise';
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args = [self.buildFormXObject(resources, xobj)];
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} else if ('Image' == type.name) {
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var data = self.buildPaintImageXObject(
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resources, args[0], true);
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resources, xobj, false);
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Util.extendObj(dependencies, data.dependencies);
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self.insertDependencies(queue, data.dependencies);
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fn = data.fn;
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args = data.args;
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}
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switch (fn) {
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// Parse the ColorSpace data to a raw format.
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case 'setFillColorSpace':
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case 'setStrokeColorSpace':
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args = [ColorSpace.parseToIR(args[0], xref, resources)];
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break;
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case 'shadingFill':
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var shadingRes = resources.get('Shading');
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if (!shadingRes)
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error('No shading resource found');
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var shading = shadingRes.get(args[0].name);
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if (!shading)
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error('No shading object found');
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var shadingFill = Pattern.parseShading(
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shading, null, xref, resources);
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var patternIR = shadingFill.getIR();
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args = [patternIR];
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fn = 'shadingFill';
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break;
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case 'setGState':
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var dictName = args[0];
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var extGState = resources.get('ExtGState');
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if (!isDict(extGState) || !extGState.has(dictName.name))
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break;
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var gState = extGState.get(dictName.name);
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fn = 'promise';
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args = [self.setGState(resources, gState)];
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} // switch
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fnArray.push(fn);
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argsArray.push(args);
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args = [];
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parser.saveState();
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} else if (obj !== null && obj !== undefined) {
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args.push(obj instanceof Dict ? obj.getAll() : obj);
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assertWellFormed(args.length <= 33, 'Too many arguments');
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}
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}
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var subQueuePromises = [];
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for (var i = 0; i < fnArray.length; ++i) {
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if (fnArray[i] === 'promise') {
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subQueuePromises.push(argsArray[i][0]);
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}
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}
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Promise.all(subQueuePromises).then(function(datas) {
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// TODO(mack): Optimize by using repositioning elements
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// in original queue rather than creating new queue
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for (var i = 0, n = datas.length; i < n; ++i) {
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var data = datas[i];
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var subQueue = data.queue;
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queue.transparency = subQueue.transparency || queue.transparency;
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Util.extendObj(dependencies, data.dependencies);
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}
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var newFnArray = [];
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var newArgsArray = [];
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var currOffset = 0;
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var subQueueIdx = 0;
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for (var i = 0, n = fnArray.length; i < n; ++i) {
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var offset = i + currOffset;
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if (fnArray[i] === 'promise') {
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var data = datas[subQueueIdx++];
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var subQueue = data.queue;
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var subQueueFnArray = subQueue.fnArray;
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var subQueueArgsArray = subQueue.argsArray;
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for (var j = 0, nn = subQueueFnArray.length; j < nn; ++j) {
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newFnArray[offset + j] = subQueueFnArray[j];
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newArgsArray[offset + j] = subQueueArgsArray[j];
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}
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currOffset += subQueueFnArray.length - 1;
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} else {
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newFnArray[offset] = fnArray[i];
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newArgsArray[offset] = argsArray[i];
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error('Unhandled XObject subtype ' + type.name);
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}
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}
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promise.resolve({
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queue: {
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fnArray: newFnArray,
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argsArray: newArgsArray,
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transparency: queue.transparency
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},
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dependencies: dependencies
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});
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});
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} catch (e) {
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if (!(e instanceof MissingDataException)) {
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throw e;
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} else if (cmd == 'Tf') { // eagerly collect all fonts
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fn = 'promise';
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args = [self.handleSetFont(resources, args)];
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} else if (cmd == 'EI') {
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var data = self.buildPaintImageXObject(
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resources, args[0], true);
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Util.extendObj(dependencies, data.dependencies);
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self.insertDependencies(queue, data.dependencies);
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fn = data.fn;
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args = data.args;
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}
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self.pdfManager.requestRange(e.begin, e.end).then(parseCommands);
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switch (fn) {
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// Parse the ColorSpace data to a raw format.
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case 'setFillColorSpace':
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case 'setStrokeColorSpace':
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args = [ColorSpace.parseToIR(args[0], xref, resources)];
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break;
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case 'shadingFill':
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var shadingRes = resources.get('Shading');
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if (!shadingRes)
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error('No shading resource found');
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var shading = shadingRes.get(args[0].name);
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if (!shading)
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error('No shading object found');
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var shadingFill = Pattern.parseShading(
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shading, null, xref, resources);
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var patternIR = shadingFill.getIR();
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args = [patternIR];
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fn = 'shadingFill';
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break;
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case 'setGState':
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var dictName = args[0];
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var extGState = resources.get('ExtGState');
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if (!isDict(extGState) || !extGState.has(dictName.name))
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break;
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var gState = extGState.get(dictName.name);
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fn = 'promise';
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args = [self.setGState(resources, gState)];
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} // switch
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fnArray.push(fn);
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argsArray.push(args);
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args = [];
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parser.saveState();
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} else if (obj !== null && obj !== undefined) {
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args.push(obj instanceof Dict ? obj.getAll() : obj);
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assertWellFormed(args.length <= 33, 'Too many arguments');
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}
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}
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parser.saveState();
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parseCommands();
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var subQueuePromises = [];
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for (var i = 0; i < fnArray.length; ++i) {
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if (fnArray[i] === 'promise') {
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subQueuePromises.push(argsArray[i][0]);
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}
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}
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Promise.all(subQueuePromises).then(function(datas) {
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// TODO(mack): Optimize by using repositioning elements
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// in original queue rather than creating new queue
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for (var i = 0, n = datas.length; i < n; ++i) {
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var data = datas[i];
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var subQueue = data.queue;
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queue.transparency = subQueue.transparency || queue.transparency;
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Util.extendObj(dependencies, data.dependencies);
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}
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var newFnArray = [];
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var newArgsArray = [];
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var currOffset = 0;
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var subQueueIdx = 0;
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for (var i = 0, n = fnArray.length; i < n; ++i) {
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var offset = i + currOffset;
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if (fnArray[i] === 'promise') {
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var data = datas[subQueueIdx++];
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var subQueue = data.queue;
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var subQueueFnArray = subQueue.fnArray;
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var subQueueArgsArray = subQueue.argsArray;
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for (var j = 0, nn = subQueueFnArray.length; j < nn; ++j) {
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newFnArray[offset + j] = subQueueFnArray[j];
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newArgsArray[offset + j] = subQueueArgsArray[j];
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}
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currOffset += subQueueFnArray.length - 1;
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} else {
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newFnArray[offset] = fnArray[i];
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newArgsArray[offset] = argsArray[i];
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}
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}
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promise.resolve({
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queue: {
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fnArray: newFnArray,
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argsArray: newArgsArray,
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transparency: queue.transparency
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},
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dependencies: dependencies
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});
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});
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return promise;
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},
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@ -863,161 +847,148 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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var chunkPromises = [];
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var fontPromise;
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function parseCommands() {
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try {
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parser.restoreState();
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var args = [];
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var args = [];
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while (true) {
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var obj = parser.getObj();
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if (isEOF(obj)) {
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break;
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}
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if (isCmd(obj)) {
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var cmd = obj.cmd;
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switch (cmd) {
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// TODO: Add support for SAVE/RESTORE and XFORM here.
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case 'Tf':
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fontPromise = handleSetFont(args[0].name, null, resources);
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//.translated;
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break;
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case 'TJ':
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var chunkPromise = new Promise();
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chunkPromises.push(chunkPromise);
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fontPromise.then(function(items, chunkPromise, font) {
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var chunk = '';
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for (var j = 0, jj = items.length; j < jj; j++) {
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if (typeof items[j] === 'string') {
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chunk += fontCharsToUnicode(items[j], font);
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} else if (items[j] < 0 && font.spaceWidth > 0) {
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var fakeSpaces = -items[j] / font.spaceWidth;
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if (fakeSpaces > MULTI_SPACE_FACTOR) {
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fakeSpaces = Math.round(fakeSpaces);
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while (fakeSpaces--) {
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chunk += ' ';
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}
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} else if (fakeSpaces > SPACE_FACTOR) {
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chunk += ' ';
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}
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}
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}
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chunkPromise.resolve(
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getBidiText(chunk, -1, font.vertical));
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}.bind(null, args[0], chunkPromise));
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break;
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case 'Tj':
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var chunkPromise = new Promise();
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chunkPromises.push(chunkPromise);
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fontPromise.then(function(charCodes, chunkPromise, font) {
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var chunk = fontCharsToUnicode(charCodes, font);
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chunkPromise.resolve(
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getBidiText(chunk, -1, font.vertical));
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}.bind(null, args[0], chunkPromise));
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break;
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case '\'':
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// For search, adding a extra white space for line breaks
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// would be better here, but that causes too much spaces in
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// the text-selection divs.
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var chunkPromise = new Promise();
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chunkPromises.push(chunkPromise);
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fontPromise.then(function(charCodes, chunkPromise, font) {
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var chunk = fontCharsToUnicode(charCodes, font);
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chunkPromise.resolve(
|
||||
getBidiText(chunk, -1, font.vertical));
|
||||
}.bind(null, args[0], chunkPromise));
|
||||
break;
|
||||
case '"':
|
||||
// Note comment in "'"
|
||||
var chunkPromise = new Promise();
|
||||
chunkPromises.push(chunkPromise);
|
||||
fontPromise.then(function(charCodes, chunkPromise, font) {
|
||||
var chunk = fontCharsToUnicode(charCodes, font);
|
||||
chunkPromise.resolve(
|
||||
getBidiText(chunk, -1, font.vertical));
|
||||
}.bind(null, args[2], chunkPromise));
|
||||
break;
|
||||
case 'Do':
|
||||
if (args[0].code) {
|
||||
break;
|
||||
}
|
||||
|
||||
if (!xobjs) {
|
||||
xobjs = resources.get('XObject') || new Dict();
|
||||
}
|
||||
|
||||
var name = args[0].name;
|
||||
var xobj = xobjs.get(name);
|
||||
if (!xobj)
|
||||
break;
|
||||
assertWellFormed(isStream(xobj),
|
||||
'XObject should be a stream');
|
||||
|
||||
var type = xobj.dict.get('Subtype');
|
||||
assertWellFormed(
|
||||
isName(type),
|
||||
'XObject should have a Name subtype'
|
||||
);
|
||||
|
||||
if ('Form' !== type.name)
|
||||
break;
|
||||
|
||||
var chunkPromise = self.getTextContent(
|
||||
xobj,
|
||||
xobj.dict.get('Resources') || resources
|
||||
);
|
||||
chunkPromises.push(chunkPromise);
|
||||
break;
|
||||
case 'gs':
|
||||
var dictName = args[0];
|
||||
var extGState = resources.get('ExtGState');
|
||||
|
||||
if (!isDict(extGState) || !extGState.has(dictName.name))
|
||||
break;
|
||||
|
||||
var gsState = extGState.get(dictName.name);
|
||||
|
||||
for (var i = 0; i < gsState.length; i++) {
|
||||
if (gsState[i] === 'Font') {
|
||||
fontPromise = handleSetFont(
|
||||
args[0].name, null, resources);
|
||||
}
|
||||
}
|
||||
break;
|
||||
} // switch
|
||||
|
||||
args = [];
|
||||
parser.saveState();
|
||||
} else if (obj !== null && obj !== undefined) {
|
||||
assertWellFormed(args.length <= 33, 'Too many arguments');
|
||||
args.push(obj);
|
||||
}
|
||||
} // while
|
||||
|
||||
Promise.all(chunkPromises).then(function(datas) {
|
||||
var bidiTexts = [];
|
||||
for (var i = 0, n = datas.length; i < n; ++i) {
|
||||
var bidiText = datas[i];
|
||||
if (!bidiText) {
|
||||
continue;
|
||||
} else if (isArray(bidiText)) {
|
||||
Util.concatenateToArray(bidiTexts, bidiText);
|
||||
} else {
|
||||
bidiTexts.push(bidiText);
|
||||
}
|
||||
}
|
||||
statePromise.resolve(bidiTexts);
|
||||
});
|
||||
} catch (e) {
|
||||
if (!(e instanceof MissingDataException)) {
|
||||
throw e;
|
||||
}
|
||||
|
||||
self.pdfManager.requestRange(e.begin, e.end).then(parseCommands);
|
||||
while (true) {
|
||||
var obj = parser.getObj();
|
||||
if (isEOF(obj)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
parser.saveState();
|
||||
parseCommands();
|
||||
|
||||
if (isCmd(obj)) {
|
||||
var cmd = obj.cmd;
|
||||
switch (cmd) {
|
||||
// TODO: Add support for SAVE/RESTORE and XFORM here.
|
||||
case 'Tf':
|
||||
fontPromise = handleSetFont(args[0].name, null, resources);
|
||||
//.translated;
|
||||
break;
|
||||
case 'TJ':
|
||||
var chunkPromise = new Promise();
|
||||
chunkPromises.push(chunkPromise);
|
||||
fontPromise.then(function(items, chunkPromise, font) {
|
||||
var chunk = '';
|
||||
for (var j = 0, jj = items.length; j < jj; j++) {
|
||||
if (typeof items[j] === 'string') {
|
||||
chunk += fontCharsToUnicode(items[j], font);
|
||||
} else if (items[j] < 0 && font.spaceWidth > 0) {
|
||||
var fakeSpaces = -items[j] / font.spaceWidth;
|
||||
if (fakeSpaces > MULTI_SPACE_FACTOR) {
|
||||
fakeSpaces = Math.round(fakeSpaces);
|
||||
while (fakeSpaces--) {
|
||||
chunk += ' ';
|
||||
}
|
||||
} else if (fakeSpaces > SPACE_FACTOR) {
|
||||
chunk += ' ';
|
||||
}
|
||||
}
|
||||
}
|
||||
chunkPromise.resolve(
|
||||
getBidiText(chunk, -1, font.vertical));
|
||||
}.bind(null, args[0], chunkPromise));
|
||||
break;
|
||||
case 'Tj':
|
||||
var chunkPromise = new Promise();
|
||||
chunkPromises.push(chunkPromise);
|
||||
fontPromise.then(function(charCodes, chunkPromise, font) {
|
||||
var chunk = fontCharsToUnicode(charCodes, font);
|
||||
chunkPromise.resolve(
|
||||
getBidiText(chunk, -1, font.vertical));
|
||||
}.bind(null, args[0], chunkPromise));
|
||||
break;
|
||||
case '\'':
|
||||
// For search, adding a extra white space for line breaks
|
||||
// would be better here, but that causes too much spaces in
|
||||
// the text-selection divs.
|
||||
var chunkPromise = new Promise();
|
||||
chunkPromises.push(chunkPromise);
|
||||
fontPromise.then(function(charCodes, chunkPromise, font) {
|
||||
var chunk = fontCharsToUnicode(charCodes, font);
|
||||
chunkPromise.resolve(
|
||||
getBidiText(chunk, -1, font.vertical));
|
||||
}.bind(null, args[0], chunkPromise));
|
||||
break;
|
||||
case '"':
|
||||
// Note comment in "'"
|
||||
var chunkPromise = new Promise();
|
||||
chunkPromises.push(chunkPromise);
|
||||
fontPromise.then(function(charCodes, chunkPromise, font) {
|
||||
var chunk = fontCharsToUnicode(charCodes, font);
|
||||
chunkPromise.resolve(
|
||||
getBidiText(chunk, -1, font.vertical));
|
||||
}.bind(null, args[2], chunkPromise));
|
||||
break;
|
||||
case 'Do':
|
||||
if (args[0].code) {
|
||||
break;
|
||||
}
|
||||
|
||||
if (!xobjs) {
|
||||
xobjs = resources.get('XObject') || new Dict();
|
||||
}
|
||||
|
||||
var name = args[0].name;
|
||||
var xobj = xobjs.get(name);
|
||||
if (!xobj)
|
||||
break;
|
||||
assertWellFormed(isStream(xobj),
|
||||
'XObject should be a stream');
|
||||
|
||||
var type = xobj.dict.get('Subtype');
|
||||
assertWellFormed(
|
||||
isName(type),
|
||||
'XObject should have a Name subtype'
|
||||
);
|
||||
|
||||
if ('Form' !== type.name)
|
||||
break;
|
||||
|
||||
var chunkPromise = self.getTextContent(
|
||||
xobj,
|
||||
xobj.dict.get('Resources') || resources
|
||||
);
|
||||
chunkPromises.push(chunkPromise);
|
||||
break;
|
||||
case 'gs':
|
||||
var dictName = args[0];
|
||||
var extGState = resources.get('ExtGState');
|
||||
|
||||
if (!isDict(extGState) || !extGState.has(dictName.name))
|
||||
break;
|
||||
|
||||
var gsState = extGState.get(dictName.name);
|
||||
|
||||
for (var i = 0; i < gsState.length; i++) {
|
||||
if (gsState[i] === 'Font') {
|
||||
fontPromise = handleSetFont(
|
||||
args[0].name, null, resources);
|
||||
}
|
||||
}
|
||||
break;
|
||||
} // switch
|
||||
|
||||
args = [];
|
||||
parser.saveState();
|
||||
} else if (obj !== null && obj !== undefined) {
|
||||
assertWellFormed(args.length <= 33, 'Too many arguments');
|
||||
args.push(obj);
|
||||
}
|
||||
} // while
|
||||
|
||||
Promise.all(chunkPromises).then(function(datas) {
|
||||
var bidiTexts = [];
|
||||
for (var i = 0, n = datas.length; i < n; ++i) {
|
||||
var bidiText = datas[i];
|
||||
if (!bidiText) {
|
||||
continue;
|
||||
} else if (isArray(bidiText)) {
|
||||
Util.concatenateToArray(bidiTexts, bidiText);
|
||||
} else {
|
||||
bidiTexts.push(bidiText);
|
||||
}
|
||||
}
|
||||
statePromise.resolve(bidiTexts);
|
||||
});
|
||||
|
||||
return statePromise;
|
||||
},
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue