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Basic annotation link support

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notmasteryet 2011-08-17 20:21:54 -05:00
parent 2d1b356e66
commit 5c7ecbfa28
2 changed files with 87 additions and 0 deletions
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53
pdf.js
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@ -3154,6 +3154,9 @@ var Page = (function() {
return shadow(this, 'mediaBox',
((IsArray(obj) && obj.length == 4) ? obj : null));
},
get annotations() {
return shadow(this, 'annotations', this.inheritPageProp('Annots'));
},
get width() {
var mediaBox = this.mediaBox;
var rotate = this.rotate;
@ -3266,6 +3269,56 @@ var Page = (function() {
rotate: this.rotate });
gfx.execute(this.code, xref, resources);
gfx.endDrawing();
},
rotatePoint: function (x, y) {
var rotate = this.rotate;
switch (rotate) {
default:
case 0:
return {x: x, y: this.height - y};
case 180:
return {x: this.width - x, y: y};
case 90:
return {x: this.width - y, y: this.height - x};
case 270:
return {x: y, y: x};
}
},
getLinks: function(scale) {
var xref = this.xref;
var annotations = xref.fetchIfRef(this.annotations);
var i, n = annotations.length;
var links = [];
for (i = 0; i < n; ++i) {
var annotation = xref.fetch(annotations[i]);
if (!IsDict(annotation, 'Annot'))
continue;
var subtype = annotation.get("Subtype");
if (!IsName(subtype) || subtype.name != 'Link')
continue;
var rect = annotation.get("Rect");
var topLeftCorner = this.rotatePoint(rect[0], rect[1]);
var bottomRightCorner = this.rotatePoint(rect[2], rect[3]);
var link = {};
link.x = scale * Math.min(topLeftCorner.x, bottomRightCorner.x);
link.y = scale * Math.min(topLeftCorner.y, bottomRightCorner.y);
link.width = scale * Math.abs(topLeftCorner.x - bottomRightCorner.x);
link.height = scale * Math.abs(topLeftCorner.y - bottomRightCorner.y);
var a = annotation.get("A");
if (a) {
switch(a.get("S").name) {
case "URI":
link.url = a.get("URI");
break;
default:
TODO("other link types");
break;
}
}
links.push(link);
}
return links;
}
};