DenysMedvid
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pdf2htmlEX
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clean js

This commit is contained in:
Lu Wang 2013-11-05 23:46:23 +08:00
parent d9cb7350e0
commit 4fec92efba
2 changed files with 50 additions and 41 deletions
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4
TODO
View File

@ -1,5 +1,5 @@
scale + scroll
use offsetTop/Left instead of jquery.offset()
enable global key handler
link handling + scale
more information on demo page:
- showing pdf2htmlEX home page

87
share/pdf2htmlEX.js.in
View File

@ -1,19 +1,14 @@
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab filetype=javascript : */
/**
* @license
* Core UI functions for pdf2htmlEX
* pdf2htmlEX.js: Core UI functions for pdf2htmlEX
* Copyright 2012,2013 Lu Wang <coolwanglu@gmail.com> and other contributors
* https://github.com/coolwanglu/pdf2htmlEX/blob/master/share/LICENSE
*/
/*
* pdf2htmlEX.js : a simple UI for pdf2htmlEX
*
* Copyright 2012,2013 Lu Wang <coolwanglu@gmail.com> and other contributors
*/
/*
* Dependencies:
* jQuery
* jQuery - use it only when necessary
*/
/*
@ -108,12 +103,12 @@
var $p = $(page);
this.n = parseInt($p.data('page-no'), 16);
// content box
this.$b = $p.find('.'+CSS_CLASS_NAMES.page_content_box);
this.$b = $p.children('.'+CSS_CLASS_NAMES.page_content_box);
// page size
// Need to make rescale work when page_content_box is not loaded, yet
this.h = this.p.clientHeight;
this.w = this.p.clientWidth;
this.original_height = this.p.clientHeight;
this.original_width = this.p.clientWidth;
// if page is loaded
if (this.$b.length > 0) {
@ -124,8 +119,8 @@
* set_r : last set
* cur_r : currently using
*/
this.default_r = this.set_r = this.cur_r = this.h / this.$b.height();
this.page_data = $($p.find('.'+CSS_CLASS_NAMES.page_data)[0]).data('data');
this.default_r = this.set_r = this.cur_r = this.original_height / this.$b.height();
this.page_data = $($p.children('.'+CSS_CLASS_NAMES.page_data)[0]).data('data');
this.ctm = this.page_data['ctm'];
this.ictm = invert(this.ctm);
@ -160,24 +155,24 @@
}
var s = this.p.style;
s.height = (this.h * this.set_r) + 'px';
s.width = (this.w * this.set_r) + 'px';
s.height = (this.original_height * this.set_r) + 'px';
s.width = (this.original_width * this.set_r) + 'px';
},
/* return if any part of this page is shown in the container */
// TODO: consider scale
is_visible : function() {
var off = this.position();
return !((off[1] > this.h) || (off[1] + this.p.parentNode.clientHeight < 0));
var p = this.p;
var pos = this.position();
return !((pos[1] > p.clientHeight) || (pos[1] + p.parentNode.clientHeight < 0));
},
/* return if this page or any neighbor of it is visible */
// TODO: consider scale
is_nearly_visible : function() {
var p = this.p;
var off = this.position();
/*
* I should use the height of the previous page or the next page here
* but since they are not easily available, just use '*2', which should be a good estimate in most cases
*/
return !((off[1] > this.h * 2) || (off[1] + this.p.parentNode.clientHeight * 2 < 0));
return !((off[1] > p.clientHeight * 2) || (off[1] + p.parentNode.clientHeight * 2 < 0));
},
/*
* return the coordinate of the top-left corner of container
@ -187,12 +182,19 @@
position : function () {
var p = this.p;
var c = p.parentNode;
return [c.scrollLeft - p.offsetLeft - p.clientLeft, c.scrollTop - p.offsetTop - p.clientTop];
return [ c.scrollLeft - p.offsetLeft - p.clientLeft
, c.scrollTop - p.offsetTop - p.clientTop];
},
height : function () {
return this.p.clientHeight;
},
width : function () {
return this.p.clientWidth;
}
});
/**
* export pdf2htmlEX.Viewer
* export pdf2htmlEX.Viewer
* @constructor
*/
function Viewer(config) {
@ -229,14 +231,16 @@
this.find_pages();
// register schedule rendering
// renew old schedules since scroll() may be called frequently
var _ = this;
this.$container.scroll(function(){ _.schedule_render(); });
this.$container.scroll(function(){ _.schedule_render(true); });
if(this.config['register_key_handler'])
this.register_key_handler();
// handle links
this.$container.add(this.$outline).on('click', '.'+CSS_CLASS_NAMES.link, this, this.link_handler);
this.$container.add(this.$outline)
.on('click', '.'+CSS_CLASS_NAMES.link, this, this.link_handler);
this.render();
},
@ -249,7 +253,7 @@
find_pages : function() {
var new_pages = [];
var new_page_map = {};
var $pl= this.$container.find('.'+CSS_CLASS_NAMES.page_frame);
var $pl= this.$container.children('.'+CSS_CLASS_NAMES.page_frame);
/* 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]);
@ -272,12 +276,9 @@
if (this.pages_loading[idx])
return; // Page is already loading
var page_no_hex = cur_page.n.toString(16);
var $pf = $(cur_page.p);
this.$loading_indicator.clone().show().appendTo($pf);
var url = $pf.data('page-url');
var cur_page_ele = cur_page.p;
this.$loading_indicator.clone().show().appendTo(cur_page_ele);
var url = cur_page_ele.getAttribute('data-page-url');
if (url) {
this.pages_loading[idx] = true; // Set semaphore
@ -294,7 +295,8 @@
var p = _.pages[idx];
$(p.p).replaceWith(data);
var $new_pf = _.$container.find('#' + CSS_CLASS_NAMES.page_frame + p.n.toString(16));
var $new_pf = _.$container.children('#' + CSS_CLASS_NAMES.page_frame + p.n.toString(16));
//TODO: check $new_pf is not empty
p = new Page($new_pf[0]);
p.hide();
p.rescale(_.scale);
@ -303,7 +305,7 @@
$new_pf.find('.'+CSS_CLASS_NAMES.background_image).on('dragstart', function(e){return false;});
_.pages[idx] = p;
_.schedule_render();
_.schedule_render(false);
// Reset loading token
delete _.pages_loading[idx];
@ -354,13 +356,19 @@
}
},
schedule_render : function() {
if(this.render_timer)
/*
* renew: renew the existing schedule instead of using the old one
*/
schedule_render : function(renew) {
if(this.render_timer) {
if(!renew) return;
clearTimeout(this.render_timer);
}
var _ = this;
this.render_timer = setTimeout(function () {
_.render();
delete _.render_timer;
}, this.config['render_timeout']);
},
@ -500,14 +508,15 @@
this.$container.scrollLeft( this.$container.scrollLeft() + correction_left + offsetX );
// some pages' visibility may be toggled, wait for next render()
this.schedule_render();
// renew old schedules since rescale() may be called frequently
this.schedule_render(true);
},
fit_width : function () {
var active_page = this.get_active_page();
if(!active_page) return;
this.rescale(this.$container.width() / active_page.w, false);
this.rescale(this.$container.width() / active_page.width(), false);
this.scroll_to(this.page_map[active_page.n], [0,0]);
},
@ -515,7 +524,7 @@
var active_page = this.get_active_page();
if(!active_page) return;
this.rescale(this.$container.height() / active_page.h, false);
this.rescale(this.$container.height() / active_page.height(), false);
this.scroll_to(this.page_map[active_page.n], [0,0]);
},
@ -554,7 +563,7 @@
{
cur_pos = cur_page.position();
//get the coordinates in default user system
cur_pos = transform(cur_page.ictm, [cur_pos[0], cur_page.h-cur_pos[1]]);
cur_pos = transform(cur_page.ictm, [cur_pos[0], cur_page.height()-cur_pos[1]]);
}
var detail_str = /** @type{string} */ (t.attr('data-dest-detail'));
@ -610,7 +619,7 @@
var transform_and_scroll = function(page) {
pos = transform(page.ctm, pos);
if(upside_down) {
pos[1] = page.h - pos[1];
pos[1] = page.height() - pos[1];
}
_.scroll_to(target_page_idx, pos);
};