mirror of
https://github.com/pdf2htmlEX/pdf2htmlEX.git
synced 2024-12-21 12:40:08 +00:00
add navigation key handler
This commit is contained in:
Lu Wang
commit
c7e6c52f3c
1
AUTHORS
1
AUTHORS
@ -3,6 +3,7 @@ Lu Wang <coolwanglu@gmail.com>
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Contributors:
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Chris Cinelli <chris@allestelle.com>
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Daniel Bonniot de Ruisselet <dbonniot@chemaxon.com>
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Deepak <iapain@gmail.com>
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filodej <philode@gmail.com>
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hasufell <julian.ospald@googlemail.com>
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@ -187,8 +187,8 @@ var pdf2htmlEX = (function(){
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var _ = this;
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this.$container.scroll(function(){ _.schedule_render(); });
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//this.zoom_fixer();
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//this.register_key_handler();
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// handle links
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this.$container.add(this.$outline).on('click', '.'+CSS_CLASS_NAMES['link'], this, this.link_handler);
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@ -233,22 +233,22 @@ var pdf2htmlEX = (function(){
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url: url,
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dataType: 'text'
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}).done(function(data){
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_.pages[idx].$d.replaceWith(data);
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_.pages[idx].$d.replaceWith(data);
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var $new_pf = _.$container.find('#' + CSS_CLASS_NAMES['page_frame'] + page_no_hex);
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_.pages[idx] = new Page($new_pf, _.$container);
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_.pages[idx].hide();
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_.pages[idx].rescale(_.scale);
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_.schedule_render();
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var $new_pf = _.$container.find('#' + CSS_CLASS_NAMES['page_frame'] + page_no_hex);
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_.pages[idx] = new Page($new_pf, _.$container);
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_.pages[idx].hide();
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_.pages[idx].rescale(_.scale);
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_.schedule_render();
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// disable background image dragging
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$new_pf.find('.'+CSS_CLASS_NAMES['background_image']).on('dragstart', function(e){return false;});
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// disable background image dragging
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$new_pf.find('.'+CSS_CLASS_NAMES['background_image']).on('dragstart', function(e){return false;});
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// Reset loading token
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delete _.pages_loading[idx];
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// Reset loading token
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delete _.pages_loading[idx];
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if (successCallback) successCallback();
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}
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if (successCallback) successCallback();
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}
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).fail(function(jqXHR, textStatus, errorThrown){
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console.error('error loading page ' + idx + ': ' + textStatus);
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@ -311,7 +311,10 @@ var pdf2htmlEX = (function(){
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}, this.config['render_timeout']);
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},
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zoom_fixer : function () {
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/*
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* Handling key events, zooming, scrolling etc.
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*/
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register_key_handler: function () {
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/*
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* When user try to zoom in/out using ctrl + +/- or mouse wheel
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* handle this and prevent the default behaviours
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@ -328,27 +331,97 @@ var pdf2htmlEX = (function(){
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});
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$(window).on('keydown', function keydown(e) {
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if (e.ctrlKey || e.metaKey) {
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switch (e.keyCode) {
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case 61: // FF/Mac '='
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case 107: // FF '+' and '='
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case 187: // Chrome '+'
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var handled = false;
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var cmd = (evt.ctrlKey ? 1 : 0) |
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(evt.altKey ? 2 : 0) |
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(evt.shiftKey ? 4 : 0) |
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(evt.metaKey ? 8 : 0);
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var with_ctrl = (cmd == 9);
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var with_alt = (cmd == 2);
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switch (e.keyCode) {
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case 61: // FF/Mac '='
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case 107: // FF '+' and '='
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case 187: // Chrome '+'
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if(with_ctrl){
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_.rescale(1.0 / _.config['scale_step'], true);
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break;
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case 173: // FF/Mac '-'
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case 109: // FF '-'
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case 189: // Chrome '-'
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handled = true;
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}
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break;
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case 173: // FF/Mac '-'
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case 109: // FF '-'
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case 189: // Chrome '-'
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if(with_ctrl){
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_.rescale(_.config['scale_step'], true);
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break;
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case 48: // '0'
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handled = true;
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}
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break;
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case 48: // '0'
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if(with_ctrl){
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_.rescale(0, false);
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break;
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default:
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return;
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}
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e.preventDefault();
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handled = true;
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}
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break;
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case 33: // Page UP:
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if (with_alt) { // alt-pageup -> scroll one page up
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_.scroll_to(_.get_prev_page());
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} else { // pageup -> scroll one screen up
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_.$container.scrollTop(_.$container.scrollTop()-_.$container.height());
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}
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handled = true;
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break;
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case 34: // Page DOWN
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if (with_alt) { // alt-pagedown -> scroll one page down
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_.scroll_to(_.get_next_page());
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} else { // pagedown -> scroll one screen down
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_.$container.scrollTop(_.$container.scrollTop()+_.$container.height());
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}
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handled = true;
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break;
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case 35: // End
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if (with_ctrl) {
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_.$container.scrollTop(_.$container[0].scrollHeight);
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handled = true;
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}
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break;
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case 36: // Home
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if (e.with_ctrl) {
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_.$container.scrollTop(0);
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handled = true;
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}
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break;
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}
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});
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if(handled) {
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e.preventDefault();
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return;
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}
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}
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},
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// Find the first page that is at least half a page below the current position
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get_next_page : function() {
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var page_height = this.$container.height();
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var pl = this.pages;
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for(var i in pl) {
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var page = pl[i];
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var page_position = page.position();
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if (page_position[1] < position[1] - page_height/2)
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return page;
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}
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return undefined;
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},
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// Find the last page that is at least half a page above the current position
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get_prev_page : function() {
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var page_height = this.$container.height();
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var pl = this.pages.slice().reverse();
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for(var i in pl) {
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var page = pl[i];
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var page_position = page.position();
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if (page_position[1] > position[1] + page_height/2)
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return page;
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}
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return undefined;
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},
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rescale : function (ratio, is_relative, offsetX, offsetY) {
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@ -427,16 +500,16 @@ var pdf2htmlEX = (function(){
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},
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get_active_page : function () {
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// get page that are on the center of the view //TODO better on top?!
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var y_center = this.$container.offset().top + this.$container.height() / 2;
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var pl = this.pages;
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var last_page = -1;
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for (var i in pl) {
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if (pl[i].$p.offset().top > y_center)
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break;
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last_page = i;
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}
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return pl[last_page];
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// get page that are on the center of the view //TODO better on top?!
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var y_center = this.$container.offset().top + this.$container.height() / 2;
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var pl = this.pages;
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var last_page = -1;
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for (var i in pl) {
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if (pl[i].$p.offset().top > y_center)
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break;
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last_page = i;
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}
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return pl[last_page];
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},
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get_containing_page : function(obj) {
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@ -476,7 +549,7 @@ var pdf2htmlEX = (function(){
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switch(detail[1]) {
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case 'XYZ':
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pos = [(detail[2] == null) ? cur_pos[0] : detail[2]
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,(detail[3] == null) ? cur_pos[1] : detail[3]];
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,(detail[3] == null) ? cur_pos[1] : detail[3]];
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ok = true;
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break;
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case 'Fit':
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@ -529,12 +602,15 @@ var pdf2htmlEX = (function(){
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e.preventDefault();
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}
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},
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/* pos=[x,y], where (0,0) is the top-left corner */
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scroll_to : function(pageno, pos) {
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var target_page = this.pages[pageno];
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if(target_page == undefined) return;
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if(pos == undefined)
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pos = [0,0];
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var cur_target_pos = target_page.position();
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this.$container.scrollLeft(this.$container.scrollLeft()-cur_target_pos[0]+pos[0]);
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