DenysMedvid/pdf2htmlEX
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add navigation key handler

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This commit is contained in:
Lu Wang 2013-10-06 19:53:37 +08:00
commit c7e6c52f3c
2 changed files with 121 additions and 44 deletions
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1
AUTHORS
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@ -3,6 +3,7 @@ Lu Wang <coolwanglu@gmail.com>
Contributors:
Chris Cinelli <chris@allestelle.com>
Daniel Bonniot de Ruisselet <dbonniot@chemaxon.com>
Deepak <iapain@gmail.com>
filodej <philode@gmail.com>
hasufell <julian.ospald@googlemail.com>

88
share/pdf2htmlEX.js.in
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@ -187,7 +187,7 @@ var pdf2htmlEX = (function(){
var _ = this;
this.$container.scroll(function(){ _.schedule_render(); });
//this.zoom_fixer();
//this.register_key_handler();
// handle links
this.$container.add(this.$outline).on('click', '.'+CSS_CLASS_NAMES['link'], this, this.link_handler);
@ -311,7 +311,10 @@ var pdf2htmlEX = (function(){
}, this.config['render_timeout']);
},
zoom_fixer : function () {
/*
* Handling key events, zooming, scrolling etc.
*/
register_key_handler: function () {
/*
* When user try to zoom in/out using ctrl + +/- or mouse wheel
* handle this and prevent the default behaviours
@ -328,27 +331,97 @@ var pdf2htmlEX = (function(){
});
$(window).on('keydown', function keydown(e) {
if (e.ctrlKey || e.metaKey) {
var handled = false;
var cmd = (evt.ctrlKey ? 1 : 0) |
(evt.altKey ? 2 : 0) |
(evt.shiftKey ? 4 : 0) |
(evt.metaKey ? 8 : 0);
var with_ctrl = (cmd == 9);
var with_alt = (cmd == 2);
switch (e.keyCode) {
case 61: // FF/Mac '='
case 107: // FF '+' and '='
case 187: // Chrome '+'
if(with_ctrl){
_.rescale(1.0 / _.config['scale_step'], true);
handled = true;
}
break;
case 173: // FF/Mac '-'
case 109: // FF '-'
case 189: // Chrome '-'
if(with_ctrl){
_.rescale(_.config['scale_step'], true);
handled = true;
}
break;
case 48: // '0'
if(with_ctrl){
_.rescale(0, false);
handled = true;
}
break;
default:
case 33: // Page UP:
if (with_alt) { // alt-pageup -> scroll one page up
_.scroll_to(_.get_prev_page());
} else { // pageup -> scroll one screen up
_.$container.scrollTop(_.$container.scrollTop()-_.$container.height());
}
handled = true;
break;
case 34: // Page DOWN
if (with_alt) { // alt-pagedown -> scroll one page down
_.scroll_to(_.get_next_page());
} else { // pagedown -> scroll one screen down
_.$container.scrollTop(_.$container.scrollTop()+_.$container.height());
}
handled = true;
break;
case 35: // End
if (with_ctrl) {
_.$container.scrollTop(_.$container[0].scrollHeight);
handled = true;
}
break;
case 36: // Home
if (e.with_ctrl) {
_.$container.scrollTop(0);
handled = true;
}
break;
}
if(handled) {
e.preventDefault();
return;
}
e.preventDefault();
}
});
},
// Find the first page that is at least half a page below the current position
get_next_page : function() {
var page_height = this.$container.height();
var pl = this.pages;
for(var i in pl) {
var page = pl[i];
var page_position = page.position();
if (page_position[1] < position[1] - page_height/2)
return page;
}
return undefined;
},
// Find the last page that is at least half a page above the current position
get_prev_page : function() {
var page_height = this.$container.height();
var pl = this.pages.slice().reverse();
for(var i in pl) {
var page = pl[i];
var page_position = page.position();
if (page_position[1] > position[1] + page_height/2)
return page;
}
return undefined;
},
rescale : function (ratio, is_relative, offsetX, offsetY) {
@ -535,6 +608,9 @@ var pdf2htmlEX = (function(){
var target_page = this.pages[pageno];
if(target_page == undefined) return;
if(pos == undefined)
pos = [0,0];
var cur_target_pos = target_page.position();
this.$container.scrollLeft(this.$container.scrollLeft()-cur_target_pos[0]+pos[0]);