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initial impl of char spacing and word spacing

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sbarman 2011-07-22 16:15:04 -07:00
parent bdece53bf5
commit c58aa5f232
1 changed files with 36 additions and 13 deletions
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49
pdf.js
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@ -4114,13 +4114,13 @@ var CanvasGraphics = (function() {
endText: function() {
},
setCharSpacing: function(spacing) {
this.ctx.charSpacing = spacing;
this.current.charSpacing = spacing;
},
setWordSpacing: function(spacing) {
this.ctx.wordSpacing = spacing;
this.current.wordSpacing = spacing;
},
setHScale: function(scale) {
this.ctx.textHScale = (scale % 100) * 0.01;
this.current.textHScale = (scale % 100) * 0.01;
},
setLeading: function(leading) {
this.current.leading = leading;
@ -4195,18 +4195,41 @@ var CanvasGraphics = (function() {
ctx.save();
ctx.transform.apply(ctx, current.textMatrix);
ctx.scale(1, -1);
ctx.translate(current.x, -1 * current.y);
if (this.ctx.$showText) {
ctx.$showText(current.y, text);
} else {
ctx.translate(current.x, -1 * current.y);
var font = this.current.font;
if (font) {
if (this.current.fontSize < kRasterizerMin)
ctx.transform(1 / kScalePrecision, 0, 0, 1 / kScalePrecision, 0, 0);
ctx.transform.apply(ctx, font.textMatrix);
text = font.charsToUnicode(text);
var scaleFactor = 1;
var font = this.current.font;
if (font) {
if (this.current.fontSize < kRasterizerMin) {
scaleFactor = 1 / kScalePrecision;
ctx.scale(scaleFactor, scaleFactor);
}
ctx.transform.apply(ctx, font.textMatrix);
text = font.charsToUnicode(text);
}
var charSpacing = current.charSpacing;
var wordSpacing = current.wordSpacing;
var textHScale = current.textHScale;
if (charSpacing || wordSpacing || textHScale) {
charSpacing = charSpacing || 0;
wordSpacing = wordSpacing || 0;
var width = 0;
for (var i = 0, ii = text.length; i < ii; ++i) {
var c = text.charAt(i);
ctx.fillText(c, 0, 0);
var charWidth = FontMeasure.measureText(c) + charSpacing;
if (c.charCodeAt(0) == 32)
charWidth += wordSpacing;
ctx.translate(charWidth / scaleFactor, 0);
width += charWidth;
}
current.x += width;
} else {
ctx.fillText(text, 0, 0);
current.x += FontMeasure.measureText(text);
}