DenysMedvid/pdf2htmlEX
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js: store pages in an array

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This commit is contained in:
Lu Wang 2013-10-28 16:05:24 +08:00
parent aa30d82d7a
commit 7787b26e5b
2 changed files with 39 additions and 25 deletions
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1
TODO
View File

@ -8,7 +8,6 @@ pdf:miui
tmp dir: use pid
remove page from dom -- UI option
view hash
store $pages from 0,
- store a separate map/dict for 'original' page number
- OR adjust all destinations

63
share/js_src/pdf2htmlEX.js.in
View File

@ -190,14 +190,13 @@
/**
* export pdf2htmlEX.Viewer
* @constructor
* @struct
*/
function Viewer(config) {
/* do nothing if jQuery is not ready */
if(!window.jQuery) return;
this.config = $.extend({}, DEFAULT_CONFIG, config);
this.pages_loading = {};
this.pages_loading = [];
this.init_before_loading_content();
var _ = this;
@ -237,15 +236,23 @@
this.render();
},
/*
* set up this.pages and this.page_map
* pages is an array holding all the Page objects
* page-Map maps an original page number (in PDF) to the corresponding index in page
*/
find_pages : function() {
var new_pages = new Array();
var new_pages = [];
var new_page_map = {};
var $pl= $('.'+CSS_CLASS_NAMES.page_frame, this.$container);
/* don't use for(..in..) since $pl is more than an Array */
for(var i = 0, l = $pl.length; i < l; ++i) {
var p = new Page($pl[i], this.$container);
new_pages[p.n] = p;
new_pages.push(p);
new_page_map[p.n] = p;
}
this.pages = new_pages;
this.page_map = new_page_map;
},
load_page : function(idx, pages_to_preload, successCallback, errorCallback) {
@ -323,14 +330,14 @@
hide_pages : function() {
var pl = this.pages;
for(var i in pl)
for(var i = 0, l = pl.length; i < l; ++i)
pl[i].hide();
},
render : function () {
/* hide (positional) invisible pages */
var pl = this.pages;
for(var i in pl) {
for(var i = 0, l = pl.length; i < l; ++i) {
var p = pl[i];
if(p.is_nearly_visible()){
if (p.loaded) {
@ -481,7 +488,7 @@
this.scale = ratio;
// Rescale pages
for(var i in pl) {
for(var i = 0, l = pl.length; i < l; ++i) {
if (prerendering_enabled && i >= min_visible && i <= max_visible)
pl[i].rescale(this.scale, true); // Force immediate refresh
else
@ -524,7 +531,7 @@
var y_center = this.$container.offset().top + this.$container.height() / 2;
var pl = this.pages;
var last_page = -1;
for (var i in pl) {
for(var i = 0, l = pl.length; i < l; ++i) {
if (pl[i].$p.offset().top > y_center)
break;
last_page = i;
@ -534,8 +541,15 @@
get_containing_page : function(obj) {
/* get the page obj containing obj */
var p = obj.closest('.'+CSS_CLASS_NAMES.page_frame)[0];
return p && this.pages[(new Page(p, null)).n];
var $p = obj.closest('.'+CSS_CLASS_NAMES.page_frame);
if($p.length == 0) return;
/*
* Get original page number and map it to index of pages
* TODO: store the index on the dom element
*/
var pn = (new Page($p[0], null)).n;
var pm = this.page_map;
return (pn in pm) && this.pages[pm[pn]];
},
link_handler : function (e) {
@ -559,8 +573,11 @@
var ok = false;
var detail = JSON.parse(detail_str);
var target_page = _.pages[detail[0]];
if(target_page === undefined) return;
var target_page_no = detail[0];
var page_map = this.page_map;
if(!(target_page_no in page_map)) return;
var target_page_idx = page_map[target_page_no];
var target_page = _.pages[target_page_idx];
var pos = [0,0];
var upside_down = true;
@ -599,33 +616,31 @@
}
if(ok) {
var transform_and_scroll = function() {
pos = transform(target_page.ctm, pos);
/* page should of type Page */
var transform_and_scroll = function(page) {
pos = transform(page.ctm, pos);
if(upside_down) {
pos[1] = target_page.h - pos[1];
pos[1] = page.h - pos[1];
}
_.scroll_to(detail[0], pos);
_.scroll_to(target_page_idx, pos);
};
if (target_page.loaded) {
transform_and_scroll();
transform_and_scroll(target_page);
} else {
// Scroll to the exact position once loaded.
_.load_page(target_page.n, 1, function() {
target_page = _.pages[target_page.n]; // Refresh reference
transform_and_scroll();
});
_.load_page(target_page.n, undefined, transform_and_scroll);
// In the meantime page gets loaded, scroll approximately position for maximum responsiveness.
_.scroll_to(detail[0], [0,0]);
_.scroll_to(target_page_idx, [0,0]);
}
e.preventDefault();
}
},
/* pos=[x,y], where (0,0) is the top-left corner */
scroll_to : function(pageno, pos) {
var target_page = this.pages[pageno];
scroll_to : function(page_idx, pos) {
var target_page = this.pages[page_idx];
if(target_page === undefined) return;
if(pos === undefined)