Skip commands that have too few arguments
- Commands that have too few args will be skipped - Commands that have too many args will generate an info, but still execute
This commit is contained in:
mduan
parent
4fa82683fa
commit
5ab3bb1e03
194
src/evaluator.js
194
src/evaluator.js
@ -30,101 +30,104 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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this.fontIdCounter = 0;
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}
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// Specifies properties for each command
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//
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// If variableArgs === true: [0, `numArgs`] expected
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// If variableArgs === false: exactly `numArgs` expected
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var OP_MAP = {
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// Graphics state
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w: 'setLineWidth',
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J: 'setLineCap',
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j: 'setLineJoin',
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M: 'setMiterLimit',
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d: 'setDash',
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ri: 'setRenderingIntent',
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i: 'setFlatness',
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gs: 'setGState',
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q: 'save',
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Q: 'restore',
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cm: 'transform',
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// Graphic state
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w: { fnName: 'setLineWidth', numArgs: 1, variableArgs: false },
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J: { fnName: 'setLineCap', numArgs: 1, variableArgs: false },
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j: { fnName: 'setLineJoin', numArgs: 1, variableArgs: false },
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M: { fnName: 'setMiterLimit', numArgs: 1, variableArgs: false },
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d: { fnName: 'setDash', numArgs: 2, variableArgs: false },
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ri: { fnName: 'setRenderingIntent', numArgs: 1, variableArgs: false },
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i: { fnName: 'setFlatness', numArgs: 1, variableArgs: false },
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gs: { fnName: 'setGState', numArgs: 1, variableArgs: false },
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q: { fnName: 'save', numArgs: 0, variableArgs: false },
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Q: { fnName: 'restore', numArgs: 0, variableArgs: false },
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cm: { fnName: 'transform', numArgs: 6, variableArgs: false },
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// Path
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m: 'moveTo',
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l: 'lineTo',
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c: 'curveTo',
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v: 'curveTo2',
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y: 'curveTo3',
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h: 'closePath',
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re: 'rectangle',
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S: 'stroke',
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s: 'closeStroke',
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f: 'fill',
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F: 'fill',
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'f*': 'eoFill',
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B: 'fillStroke',
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'B*': 'eoFillStroke',
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b: 'closeFillStroke',
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'b*': 'closeEOFillStroke',
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n: 'endPath',
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m: { fnName: 'moveTo', numArgs: 2, variableArgs: false },
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l: { fnName: 'lineTo', numArgs: 2, variableArgs: false },
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c: { fnName: 'curveTo', numArgs: 6, variableArgs: false },
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v: { fnName: 'curveTo2', numArgs: 4, variableArgs: false },
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y: { fnName: 'curveTo3', numArgs: 4, variableArgs: false },
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h: { fnName: 'closePath', numArgs: 0, variableArgs: false },
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re: { fnName: 'rectangle', numArgs: 4, variableArgs: false },
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S: { fnName: 'stroke', numArgs: 0, variableArgs: false },
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s: { fnName: 'closeStroke', numArgs: 0, variableArgs: false },
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f: { fnName: 'fill', numArgs: 0, variableArgs: false },
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F: { fnName: 'fill', numArgs: 0, variableArgs: false },
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'f*': { fnName: 'eoFill', numArgs: 0, variableArgs: false },
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B: { fnName: 'fillStroke', numArgs: 0, variableArgs: false },
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'B*': { fnName: 'eoFillStroke', numArgs: 0, variableArgs: false },
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b: { fnName: 'closeFillStroke', numArgs: 0, variableArgs: false },
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'b*': { fnName: 'closeEOFillStroke', numArgs: 0, variableArgs: false },
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n: { fnName: 'endPath', numArgs: 0, variableArgs: false },
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// Clipping
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W: 'clip',
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'W*': 'eoClip',
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W: { fnName: 'clip', numArgs: 0, variableArgs: false },
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'W*': { fnName: 'eoClip', numArgs: 0, variableArgs: false },
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// Text
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BT: 'beginText',
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ET: 'endText',
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Tc: 'setCharSpacing',
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Tw: 'setWordSpacing',
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Tz: 'setHScale',
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TL: 'setLeading',
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Tf: 'setFont',
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Tr: 'setTextRenderingMode',
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Ts: 'setTextRise',
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Td: 'moveText',
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TD: 'setLeadingMoveText',
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Tm: 'setTextMatrix',
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'T*': 'nextLine',
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Tj: 'showText',
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TJ: 'showSpacedText',
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"'": 'nextLineShowText',
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'"': 'nextLineSetSpacingShowText',
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BT: { fnName: 'beginText', numArgs: 0, variableArgs: false },
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ET: { fnName: 'endText', numArgs: 0, variableArgs: false },
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Tc: { fnName: 'setCharSpacing', numArgs: 1, variableArgs: false },
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Tw: { fnName: 'setWordSpacing', numArgs: 1, variableArgs: false },
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Tz: { fnName: 'setHScale', numArgs: 1, variableArgs: false },
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TL: { fnName: 'setLeading', numArgs: 1, variableArgs: false },
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Tf: { fnName: 'setFont', numArgs: 2, variableArgs: false },
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Tr: { fnName: 'setTextRenderingMode', numArgs: 1, variableArgs: false },
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Ts: { fnName: 'setTextRise', numArgs: 1, variableArgs: false },
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Td: { fnName: 'moveText', numArgs: 2, variableArgs: false },
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TD: { fnName: 'setLeadingMoveText', numArgs: 2, variableArgs: false },
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Tm: { fnName: 'setTextMatrix', numArgs: 6, variableArgs: false },
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'T*': { fnName: 'nextLine', numArgs: 0, variableArgs: false },
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Tj: { fnName: 'showText', numArgs: 1, variableArgs: false },
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TJ: { fnName: 'showSpacedText', numArgs: 1, variableArgs: false },
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'\'': { fnName: 'nextLineShowText', numArgs: 1, variableArgs: false },
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'"': { fnName: 'nextLineSetSpacingShowText', numArgs: 3,
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variableArgs: false },
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// Type3 fonts
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d0: 'setCharWidth',
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d1: 'setCharWidthAndBounds',
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d0: { fnName: 'setCharWidth', numArgs: 2, variableArgs: false },
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d1: { fnName: 'setCharWidthAndBounds', numArgs: 6, variableArgs: false },
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// Color
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CS: 'setStrokeColorSpace',
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cs: 'setFillColorSpace',
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SC: 'setStrokeColor',
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SCN: 'setStrokeColorN',
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sc: 'setFillColor',
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scn: 'setFillColorN',
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G: 'setStrokeGray',
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g: 'setFillGray',
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RG: 'setStrokeRGBColor',
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rg: 'setFillRGBColor',
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K: 'setStrokeCMYKColor',
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k: 'setFillCMYKColor',
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CS: { fnName: 'setStrokeColorSpace', numArgs: 1, variableArgs: false },
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cs: { fnName: 'setFillColorSpace', numArgs: 1, variableArgs: false },
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SC: { fnName: 'setStrokeColor', numArgs: 4, variableArgs: true },
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SCN: { fnName: 'setStrokeColorN', numArgs: 33, variableArgs: true },
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sc: { fnName: 'setFillColor', numArgs: 4, variableArgs: true },
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scn: { fnName: 'setFillColorN', numArgs: 33, variableArgs: true },
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G: { fnName: 'setStrokeGray', numArgs: 1, variableArgs: false },
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g: { fnName: 'setFillGray', numArgs: 1, variableArgs: false },
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RG: { fnName: 'setStrokeRGBColor', numArgs: 3, variableArgs: false },
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rg: { fnName: 'setFillRGBColor', numArgs: 3, variableArgs: false },
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K: { fnName: 'setStrokeCMYKColor', numArgs: 4, variableArgs: false },
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k: { fnName: 'setFillCMYKColor', numArgs: 4, variableArgs: false },
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// Shading
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sh: 'shadingFill',
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sh: { fnName: 'shadingFill', numArgs: 1, variableArgs: false },
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// Images
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BI: 'beginInlineImage',
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ID: 'beginImageData',
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EI: 'endInlineImage',
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BI: { fnName: 'beginInlineImage', numArgs: 0, variableArgs: false },
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ID: { fnName: 'beginImageData', numArgs: 0, variableArgs: false },
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EI: { fnName: 'endInlineImage', numArgs: 0, variableArgs: false },
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// XObjects
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Do: 'paintXObject',
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// Marked content
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MP: 'markPoint',
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DP: 'markPointProps',
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BMC: 'beginMarkedContent',
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BDC: 'beginMarkedContentProps',
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EMC: 'endMarkedContent',
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Do: { fnName: 'paintXObject', numArgs: 1, variableArgs: false },
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MP: { fnName: 'markPoint', numArgs: 1, variableArgs: false },
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DP: { fnName: 'markPointProps', numArgs: 2, variableArgs: false },
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BMC: { fnName: 'beginMarkedContent', numArgs: 1, variableArgs: false },
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BDC: { fnName: 'beginMarkedContentProps', numArgs: 2, variableArgs: false },
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EMC: { fnName: 'endMarkedContent', numArgs: 0, variableArgs: false },
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// Compatibility
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BX: 'beginCompat',
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EX: 'endCompat',
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BX: { fnName: 'beginCompat', numArgs: 0, variableArgs: false },
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EX: { fnName: 'endCompat', numArgs: 0, variableArgs: false },
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// (reserved partial commands for the lexer)
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BM: null,
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@ -314,6 +317,8 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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resources = resources || new Dict();
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var xobjs = resources.get('XObject') || new Dict();
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var patterns = resources.get('Pattern') || new Dict();
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// TODO(mduan): pass array of knownCommands rather than OP_MAP
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// dictionary
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var parser = new Parser(new Lexer(stream, OP_MAP), false, xref);
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var res = resources;
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var args = [], obj;
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@ -321,13 +326,42 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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while (true) {
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obj = parser.getObj();
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if (isEOF(obj))
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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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var fn = OP_MAP[cmd];
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assertWellFormed(fn, 'Unknown command "' + 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 ' + opSpec.numArgs +
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' args, but received ' + args.length + ' 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') && !args[args.length - 1].code) {
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@ -509,8 +543,8 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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argsArray.push(args);
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args = [];
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} else if (obj != null) {
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assertWellFormed(args.length <= 33, 'Too many arguments');
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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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1
test/pdfs/.gitignore
vendored
1
test/pdfs/.gitignore
vendored
@ -1,6 +1,7 @@
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*.pdf
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!tracemonkey.pdf
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!issue2391-1.pdf
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!ArabicCIDTrueType.pdf
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!ThuluthFeatures.pdf
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!arial_unicode_ab_cidfont.pdf
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131
test/pdfs/issue2391-1.pdf
Normal file
131
test/pdfs/issue2391-1.pdf
Normal file
@ -0,0 +1,131 @@
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%PDF-1.4
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%âãÏÓ
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1 0 obj
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<<
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/Pages 2 0 R
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/Metadata 3 0 R
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/Type /Catalog
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>>
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endobj
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2 0 obj
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<<
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/Kids [4 0 R]
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/Count 1
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/Type /Pages
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>>
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endobj
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4 0 obj
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<<
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/Rotate 0
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/Parent 2 0 R
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/Resources
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<<
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/ExtGState 5 0 R
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/Font 6 0 R
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/ProcSet [/PDF /Text]
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>>
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/MediaBox [0 0 595 842]
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/Contents 7 0 R
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/Type /Page
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>>
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endobj
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7 0 obj
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<<
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/Length 148
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>>
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stream
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q 0.1 0 0 0.1 0 0 cm
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/R7 gs
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0 g
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q
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10 0 0 10 0 0 cm BT
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undefined 10 Tf
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/R8 10 Tf
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1 0 0 1 29 805 Tm
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(test command with wrong number of args)Tj
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ET
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Q
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Q
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endstream
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endobj
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8 0 obj
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<<
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/Type /ExtGState
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/OPM 1
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>>
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endobj
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9 0 obj
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<<
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/BaseFont /Courier
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/Subtype /Type1
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/Type /Font
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>>
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endobj
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5 0 obj
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<<
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/R7 8 0 R
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>>
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endobj
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6 0 obj
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<<
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/R8 9 0 R
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>>
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endobj
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3 0 obj
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<<
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/Subtype /XML
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/Length 1421
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/Type /Metadata
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>>
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stream
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<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
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<?adobe-xap-filters esc="CRLF"?>
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<x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='XMP toolkit 2.9.1-13, framework 1.6'>
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<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:iX='http://ns.adobe.com/iX/1.0/'>
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<rdf:Description rdf:about='uuid:39048ebf-93ad-11ed-0000-3d9120169d5e' xmlns:pdf='http://ns.adobe.com/pdf/1.3/' pdf:Producer='GPL Ghostscript 9.05'/>
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<rdf:Description rdf:about='uuid:39048ebf-93ad-11ed-0000-3d9120169d5e' xmlns:xmp='http://ns.adobe.com/xap/1.0/'><xmp:ModifyDate>2013-01-10T17:46:10-08:00</xmp:ModifyDate>
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<xmp:CreateDate>2013-01-10T17:46:10-08:00</xmp:CreateDate>
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<xmp:CreatorTool>GNU Enscript 1.6.6</xmp:CreatorTool></rdf:Description>
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<rdf:Description rdf:about='uuid:39048ebf-93ad-11ed-0000-3d9120169d5e' xmlns:xapMM='http://ns.adobe.com/xap/1.0/mm/' xapMM:DocumentID='uuid:39048ebf-93ad-11ed-0000-3d9120169d5e'/>
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<rdf:Description rdf:about='uuid:39048ebf-93ad-11ed-0000-3d9120169d5e' xmlns:dc='http://purl.org/dc/elements/1.1/' dc:format='application/pdf'><dc:title><rdf:Alt><rdf:li xml:lang='x-default'>Enscript Output</rdf:li></rdf:Alt></dc:title><dc:creator><rdf:Seq><rdf:li>Mack Duan</rdf:li></rdf:Seq></dc:creator></rdf:Description>
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</rdf:RDF>
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</x:xmpmeta>
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<?xpacket end='w'?>
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endstream
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endobj
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10 0 obj
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<<
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/Creator (GNU Enscript 1.6.6)
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/Title (Enscript Output)
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/Producer (GPL Ghostscript 9.05)
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/Author (Mack Duan)
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/ModDate (D:20130110174610-08'00')
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/CreationDate (D:20130110174610-08'00')
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>>
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endobj xref
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0 11
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0000000000 65535 f
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0000000015 00000 n
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0000000082 00000 n
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0000000694 00000 n
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0000000141 00000 n
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0000000628 00000 n
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0000000661 00000 n
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0000000309 00000 n
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0000000511 00000 n
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0000000558 00000 n
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0000002200 00000 n
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trailer
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<<
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/Info 10 0 R
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/Root 1 0 R
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/Size 11
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/ID [<5807376a23851d4cc6096009432892a3> <5807376a23851d4cc6096009432892a3>]
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>>
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startxref
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2406
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%%EOF
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@ -17,6 +17,13 @@
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"rounds": 1,
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"type": "text"
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},
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{ "id": "issue2391-1",
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"file": "pdfs/issue2391-1.pdf",
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"md5": "25ae9cb959612e7b343b55da63af2716",
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"rounds": 1,
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"pageLimit": 1,
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"type": "load"
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},
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{ "id": "html5-canvas-cheat-sheet-load",
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"file": "pdfs/canvas.pdf",
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"md5": "59510028561daf62e00bf9f6f066b033",
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@ -32,13 +32,12 @@ describe('evaluator', function() {
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var evaluator = new PartialEvaluator(new XrefMock(), new HandlerMock(),
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'prefix');
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var stream = new StringStream('qTT');
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var thrown = false;
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try {
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evaluator.getOperatorList(stream, new ResourcesMock(), []);
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} catch (e) {
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thrown = e;
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}
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expect(thrown).toNotEqual(false);
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var result = evaluator.getOperatorList(stream, new ResourcesMock(), []);
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expect(!!result.fnArray && !!result.argsArray).toEqual(true);
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expect(result.fnArray.length).toEqual(1);
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expect(result.fnArray[0]).toEqual('save');
|
||||
expect(result.argsArray[0].length).toEqual(0);
|
||||
});
|
||||
|
||||
it('should handle one operations', function() {
|
||||
@ -84,14 +83,14 @@ describe('evaluator', function() {
|
||||
'prefix');
|
||||
var resources = new ResourcesMock();
|
||||
resources.Res1 = {};
|
||||
var stream = new StringStream('B*BBMC');
|
||||
var stream = new StringStream('B*Bf*');
|
||||
var result = evaluator.getOperatorList(stream, resources, []);
|
||||
|
||||
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
|
||||
expect(result.fnArray.length).toEqual(3);
|
||||
expect(result.fnArray[0]).toEqual('eoFillStroke');
|
||||
expect(result.fnArray[1]).toEqual('fillStroke');
|
||||
expect(result.fnArray[2]).toEqual('beginMarkedContent');
|
||||
expect(result.fnArray[2]).toEqual('eoFill');
|
||||
});
|
||||
|
||||
it('should handle glued operations and operands', function() {
|
||||
@ -112,19 +111,53 @@ describe('evaluator', function() {
|
||||
it('should handle glued operations and literals', function() {
|
||||
var evaluator = new PartialEvaluator(new XrefMock(), new HandlerMock(),
|
||||
'prefix');
|
||||
var stream = new StringStream('trueifalserinulli');
|
||||
var stream = new StringStream('trueifalserinullq');
|
||||
var result = evaluator.getOperatorList(stream, new ResourcesMock(), []);
|
||||
|
||||
expect(!!result.fnArray && !!result.argsArray).toEqual(true);
|
||||
expect(result.fnArray.length).toEqual(3);
|
||||
expect(result.fnArray[0]).toEqual('setFlatness');
|
||||
expect(result.fnArray[1]).toEqual('setRenderingIntent');
|
||||
expect(result.fnArray[2]).toEqual('setFlatness');
|
||||
expect(result.fnArray[2]).toEqual('save');
|
||||
expect(result.argsArray.length).toEqual(3);
|
||||
expect(result.argsArray[0].length).toEqual(1);
|
||||
expect(result.argsArray[0][0]).toEqual(true);
|
||||
expect(result.argsArray[1].length).toEqual(1);
|
||||
expect(result.argsArray[1][0]).toEqual(false);
|
||||
expect(result.argsArray[2].length).toEqual(0);
|
||||
});
|
||||
});
|
||||
|
||||
describe('validateNumberOfArgs', function() {
|
||||
it('should execute if correct number of arguments', function() {
|
||||
var evaluator = new PartialEvaluator(new XrefMock(), new HandlerMock(),
|
||||
'prefix');
|
||||
var stream = new StringStream('5 1 d0');
|
||||
var result = evaluator.getOperatorList(stream, new ResourcesMock(), []);
|
||||
|
||||
expect(result.argsArray[0][0]).toEqual(5);
|
||||
expect(result.argsArray[0][1]).toEqual(1);
|
||||
expect(result.fnArray[0]).toEqual('setCharWidth');
|
||||
});
|
||||
it('should execute if too many arguments', function() {
|
||||
var evaluator = new PartialEvaluator(new XrefMock(), new HandlerMock(),
|
||||
'prefix');
|
||||
var stream = new StringStream('5 1 4 d0');
|
||||
var result = evaluator.getOperatorList(stream, new ResourcesMock(), []);
|
||||
|
||||
expect(result.argsArray[0][0]).toEqual(5);
|
||||
expect(result.argsArray[0][1]).toEqual(1);
|
||||
expect(result.argsArray[0][2]).toEqual(4);
|
||||
expect(result.fnArray[0]).toEqual('setCharWidth');
|
||||
});
|
||||
it('should skip if too few arguments', function() {
|
||||
var evaluator = new PartialEvaluator(new XrefMock(), new HandlerMock(),
|
||||
'prefix');
|
||||
var stream = new StringStream('5 d0');
|
||||
var result = evaluator.getOperatorList(stream, new ResourcesMock(), []);
|
||||
|
||||
expect(result.argsArray).toEqual([]);
|
||||
expect(result.fnArray).toEqual([]);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
Loading…
Reference in New Issue
Block a user