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'GoTo' action/links; document outline (no UI)

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notmasteryet 2011-08-19 22:41:56 -05:00
parent 455ff74c19
commit 3b940c4bcd
2 changed files with 94 additions and 15 deletions
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78
pdf.js
View File

@ -3163,7 +3163,7 @@ var XRef = (function() {
})();
var Page = (function() {
function constructor(xref, pageNumber, pageDict) {
function constructor(xref, pageNumber, pageDict, ref) {
this.pageNumber = pageNumber;
this.pageDict = pageDict;
this.stats = {
@ -3174,6 +3174,7 @@ var Page = (function() {
render: 0.0
};
this.xref = xref;
this.ref = ref;
}
constructor.prototype = {
@ -3349,10 +3350,10 @@ var Page = (function() {
var annotation = xref.fetch(annotations[i]);
if (!IsDict(annotation, 'Annot'))
continue;
var subtype = annotation.get("Subtype");
var subtype = annotation.get('Subtype');
if (!IsName(subtype) || subtype.name != 'Link')
continue;
var rect = annotation.get("Rect");
var rect = annotation.get('Rect');
var topLeftCorner = this.rotatePoint(rect[0], rect[1]);
var bottomRightCorner = this.rotatePoint(rect[2], rect[3]);
@ -3361,14 +3362,17 @@ var Page = (function() {
link.y = Math.min(topLeftCorner.y, bottomRightCorner.y);
link.width = Math.abs(topLeftCorner.x - bottomRightCorner.x);
link.height = Math.abs(topLeftCorner.y - bottomRightCorner.y);
var a = annotation.get("A");
var a = this.xref.fetchIfRef(annotation.get('A'));
if (a) {
switch(a.get("S").name) {
case "URI":
link.url = a.get("URI");
switch(a.get('S').name) {
case 'URI':
link.url = a.get('URI');
break;
case 'GoTo':
link.dest = a.get('D');
break;
default:
TODO("other link types");
TODO('other link types');
break;
}
}
@ -3398,6 +3402,62 @@ var Catalog = (function() {
// shadow the prototype getter
return shadow(this, 'toplevelPagesDict', obj);
},
get documentOutline() {
function convertIfUnicode(str) {
if (str[0] === '\xFE' && str[1] === '\xFF') {
// UTF16BE BOM
var i, n = str.length, str2 = "";
for (i = 2; i < n; i+=2)
str2 += String.fromCharCode((str.charCodeAt(i) << 8) | str.charCodeAt(i + 1));
str = str2;
}
return str;
}
var obj = this.catDict.get('Outlines');
var root = { items: [] };
if (IsRef(obj)) {
obj = this.xref.fetch(obj).get('First');
var processed = {};
if (IsRef(obj)) {
var queue = [{obj: obj, parent: root}];
// to avoid recursion keeping track of the items
// in the processed dictionary
processed['R' + obj.num + ',' + obj.gen] = true;
while (queue.length > 0) {
var i = queue.shift();
var outlineDict = this.xref.fetch(i.obj);
if (!outlineDict.has('Title'))
error('Invalid outline item');
var dest = outlineDict.get('Dest');
if (!dest && outlineDict.get('A')) {
var a = this.xref.fetchIfRef(outlineDict.get('A'));
dest = a.get('D');
}
var outlineItem = {
dest: dest,
title: convertIfUnicode(outlineDict.get('Title')),
color: outlineDict.get('C') || [0, 0, 0],
bold: !!(outlineDict.get('F') & 2),
italic: !!(outlineDict.get('F') & 1),
items: []
};
i.parent.items.push(outlineItem);
obj = outlineDict.get('First');
if (IsRef(obj) && !processed['R' + obj.num + ',' + obj.gen]) {
queue.push({obj: obj, parent: outlineItem});
processed['R' + obj.num + ',' + obj.gen] = true;
}
obj = outlineDict.get('Next');
if (IsRef(obj) && !processed['R' + obj.num + ',' + obj.gen]) {
queue.push({obj: obj, parent: i.parent});
processed['R' + obj.num + ',' + obj.gen] = true;
}
}
}
}
return shadow(this, 'documentOutline', root);
},
get numPages() {
var obj = this.toplevelPagesDict.get('Count');
assertWellFormed(
@ -3418,7 +3478,7 @@ var Catalog = (function() {
'page dictionary kid is not a reference');
var obj = this.xref.fetch(kid);
if (IsDict(obj, 'Page') || (IsDict(obj) && !obj.has('Kids'))) {
pageCache.push(new Page(this.xref, pageCache.length, obj));
pageCache.push(new Page(this.xref, pageCache.length, obj, kid));
} else { // must be a child page dictionary
assertWellFormed(
IsDict(obj),

31
web/viewer.js
View File

@ -84,6 +84,20 @@ var PDFView = {
xhr.send(null);
},
navigateTo: function (dest) {
var i, n = this.pages.length;
var destRef = dest[0];
// TODO optimize destination page search
for (i = 0; i < n; i++) {
var pageRef = this.pages[i].content.ref;
if (destRef.num == pageRef.num && destRef.gen == pageRef.gen) {
this.page = i + 1;
// TODO scroll to specific region on the page
break;
}
}
},
load: function(data, scale) {
var sidebar = document.getElementById('sidebarView');
sidebar.parentNode.scrollTop = 0;
@ -105,7 +119,7 @@ var PDFView = {
for (var i = 1; i <= pagesCount; i++) {
var page = pdf.getPage(i);
pages.push(new PageView(container, page, i, page.width, page.height,
page.stats));
page.stats, this.navigateTo.bind(this)));
thumbnails.push(new ThumbnailView(sidebar, pages[i - 1]));
}
@ -140,7 +154,8 @@ var PDFView = {
}
};
var PageView = function(container, content, id, width, height, stats) {
var PageView = function(container, content, id, width, height,
stats, navigateTo) {
this.width = width;
this.height = height;
this.id = id;
@ -178,10 +193,9 @@ var PageView = function(container, content, id, width, height, stats) {
}
x /= scale;
y /= scale;
for (var i = 0; i < links.length; i++) {
var i, n = links.length;
for (i = 0; i < n; i++) {
var link = links[i];
if (!link.url)
continue;
if (link.x <= x && link.y <= y &&
x < link.x + link.width && y < link.y + link.height) {
currentLink = link;
@ -193,7 +207,12 @@ var PageView = function(container, content, id, width, height, stats) {
canvas.style.cursor = 'default';
}, false);
canvas.addEventListener('mousedown', function(e) {
window.location.href = currentLink.url;
if (!currentLink)
return;
if (currentLink.url)
window.location.href = currentLink.url;
if (currentLink.dest)
navigateTo(currentLink.dest);
}, false);
}
}