Sakurai/pdf.js
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Suppress invisible text (#799)

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notmasteryet 2011-12-02 16:52:31 -06:00
parent c0291e9fa3
commit 00d1204705
1 changed files with 14 additions and 2 deletions
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16
src/canvas.js
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@ -23,6 +23,7 @@ var CanvasExtraState = (function canvasExtraState() {
this.charSpacing = 0;
this.wordSpacing = 0;
this.textHScale = 1;
this.textRenderingMode = 0;
// Color spaces
this.fillColorSpace = new DeviceGrayCS();
this.fillColorSpaceObj = null;
@ -543,7 +544,9 @@ var CanvasGraphics = (function canvasGraphics() {
this.ctx.font = rule;
},
setTextRenderingMode: function canvasGraphicsSetTextRenderingMode(mode) {
TODO('text rendering mode: ' + mode);
if (mode != 0 && mode != 3)
TODO('unsupported text rendering mode: ' + mode);
this.current.textRenderingMode = mode;
},
setTextRise: function canvasGraphicsSetTextRise(rise) {
TODO('text rise: ' + rise);
@ -637,6 +640,7 @@ var CanvasGraphics = (function canvasGraphics() {
var textLayer = this.textLayer;
var text = {str: '', length: 0, canvasWidth: 0, geom: {}};
var textSelection = textLayer && !skipTextSelection ? true : false;
var textRenderingMode = current.textRenderingMode;
if (textSelection) {
ctx.save();
@ -693,7 +697,15 @@ var CanvasGraphics = (function canvasGraphics() {
var char = glyph.fontChar;
var charWidth = glyph.width * fontSize * 0.001 + charSpacing;
ctx.fillText(char, width, 0);
switch (textRenderingMode) {
default: // unsupported rendering mode
case 0: // fill
ctx.fillText(char, width, 0);
break;
case 3: // invisible
}
width += charWidth;
text.str += glyph.unicode === ' ' ? ' ' : glyph.unicode;