mirror of
https://github.com/pdf2htmlEX/pdf2htmlEX.git
synced 2024-10-05 19:41:40 +00:00
support zoom in links
This commit is contained in:
Lu Wang
parent
8d2b6d0308
commit
80e6df6c2b
@ -18,6 +18,7 @@ OUTPUT="$BASEDIR/$OUTPUT_FN"
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--compilation_level ADVANCED_OPTIMIZATIONS \
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--warning_level VERBOSE \
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--process_jquery_primitives \
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--output_wrapper "(function(){%output%})();" \
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--js "$INPUT" \
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--js_output_file "$OUTPUT" && \
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echo 'Done.') || \
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@ -27,26 +27,27 @@
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'use strict';
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(function(pdf2htmlEX, document){
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/**
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var pdf2htmlEX = window['pdf2htmlEX'] = window['pdf2htmlEX'] || {};
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/**
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* @const
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* @struct
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*/
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var CSS_CLASS_NAMES = {
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var CSS_CLASS_NAMES = {
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page_frame : '@CSS_PAGE_FRAME_CN@',
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page_content_box : '@CSS_PAGE_CONTENT_BOX_CN@',
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page_data : '@CSS_PAGE_DATA_CN@',
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background_image : '@CSS_BACKGROUND_IMAGE_CN@',
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link : '@CSS_LINK_CN@',
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__dummy__ : 'no comma'
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};
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};
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/**
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/**
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* configurations of Viewer
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* @const
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* @dict
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*/
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var DEFAULT_CONFIG = {
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var DEFAULT_CONFIG = {
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// id of the element to put the pages in
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'container_id' : 'page-container',
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// id of the element for sidebar (to open and close)
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@ -65,14 +66,14 @@
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'register_key_handler' : true,
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'__dummy__' : 'no comma'
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};
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};
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/** @const */
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var EPS = 1e-6;
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/** @const */
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var EPS = 1e-6;
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/************************************/
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/* utility function */
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function invert(ctm) {
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/************************************/
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/* utility function */
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function invert(ctm) {
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var det = ctm[0] * ctm[3] - ctm[1] * ctm[2];
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return [ ctm[3] / det
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,-ctm[1] / det
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@ -81,34 +82,34 @@
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,(ctm[2] * ctm[5] - ctm[3] * ctm[4]) / det
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,(ctm[1] * ctm[4] - ctm[0] * ctm[5]) / det
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];
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};
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function transform(ctm, pos) {
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};
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function transform(ctm, pos) {
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return [ctm[0] * pos[0] + ctm[2] * pos[1] + ctm[4]
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,ctm[1] * pos[0] + ctm[3] * pos[1] + ctm[5]];
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};
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};
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/**
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/**
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* @param{Element} ele
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*/
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function get_page_number(ele) {
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function get_page_number(ele) {
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return parseInt(ele.getAttribute('data-page-no'), 16);
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};
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};
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/**
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/**
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* @param{NodeList} eles
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*/
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function disable_dragstart(eles) {
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function disable_dragstart(eles) {
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for(var i = 0, l = eles.length; i < l; ++i) {
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eles[i].addEventListener('dragstart', function() {
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return false;
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}, false);
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}
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};
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};
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/**
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/**
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* @param{...Object} var_args
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*/
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function clone_and_extend_objs(var_args) {
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function clone_and_extend_objs(var_args) {
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var result_obj = {};
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for(var i = 0, l = arguments.length; i < l; ++i) {
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var cur_obj = arguments[i];
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@ -119,13 +120,13 @@
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}
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}
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return result_obj;
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};
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};
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/**
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/**
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* @constructor
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* @param{Element} page The element for the page
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*/
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function Page(page) {
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function Page(page) {
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if(!page) return;
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this.loaded = false;
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@ -159,8 +160,8 @@
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this.loaded = true;
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}
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};
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Page.prototype = {
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};
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Page.prototype = {
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/* hide & show are for contents, the page frame is still there */
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hide : function(){
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if(this.loaded && this.shown) {
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@ -228,13 +229,13 @@
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width : function () {
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return this.p.clientWidth;
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}
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};
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};
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/**
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/**
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* export pdf2htmlEX.Viewer
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* @constructor
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*/
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function Viewer(config) {
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function Viewer(config) {
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this.config = clone_and_extend_objs(DEFAULT_CONFIG, config);
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this.pages_loading = [];
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this.init_before_loading_content();
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@ -243,9 +244,9 @@
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document.addEventListener('DOMContentLoaded', function(){
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_.init_after_loading_content();
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}, false);
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};
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};
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Viewer.prototype = {
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Viewer.prototype = {
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scale : 1,
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init_before_loading_content : function() {
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@ -568,6 +569,20 @@
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* TODO consider scale on offsetX/Y
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*/
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rescale : function (ratio, is_relative, offsetX, offsetY) {
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var old_scale = this.scale;
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var new_scale = 1.0;
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// Set new scale
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if (ratio == 0) {
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new_scale = 1;
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is_relative = false;
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}
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else if (is_relative)
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new_scale *= ratio;
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else
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new_scale = ratio;
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this.scale = new_scale;
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if (! offsetX)
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offsetX = 0;
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if (! offsetY)
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@ -579,22 +594,11 @@
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var active_page_ele = active_page.p;
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var prev_offset = [ active_page_ele.offsetLeft, active_page_ele.offsetTop ];
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var old_scale = this.scale;
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var pl = this.pages;
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// Set new scale
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if (ratio == 0) {
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this.scale = 1;
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is_relative = false;
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}
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else if (is_relative)
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this.scale *= ratio;
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else
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this.scale = ratio;
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// Rescale pages
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var pl = this.pages;
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for(var i = 0, l = pl.length; i < l; ++i)
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pl[i].rescale(this.scale);
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pl[i].rescale(new_scale);
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var container = this.container;
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// Correct container scroll to keep view aligned while zooming
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@ -604,7 +608,7 @@
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// Take the center of the view as a reference
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var prev_center_x = container.clientWidth / 2 - prev_offset[0];
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// Calculate the difference respect the center of the view after the zooming
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var correction_left = prev_center_x * (this.scale/old_scale - 1) + active_page_ele.offsetLeft - prev_offset[0];
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var correction_left = prev_center_x * (new_scale/old_scale - 1) + active_page_ele.offsetLeft - prev_offset[0];
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// Scroll the container accordingly to keep alignment to the initial reference
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container.scrollLeft += correction_left + offsetX;
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@ -686,13 +690,17 @@
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var target_page = this.pages[target_page_idx];
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var pos = [0,0];
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var zoom = this.scale;
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var upside_down = true;
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// TODO: zoom
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// TODO: fitb*
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// TODO: BBox
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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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zoom = detail[4];
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if((zoom == null) || (zoom == 0))
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zoom = this.scale;
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ok = true;
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break;
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case 'Fit':
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@ -722,8 +730,13 @@
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}
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if(ok) {
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this.rescale(zoom, false);
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var _ = this;
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/* page should of type Page */
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/**
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* page should of type Page
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* @param{Page} page
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*/
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var transform_and_scroll = function(page) {
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pos = transform(page.ctm, pos);
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if(upside_down) {
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@ -767,7 +780,6 @@
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},
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__last_member__ : 'no comma' /*,*/
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};
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};
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pdf2htmlEX['Viewer'] = Viewer;
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})((window['pdf2htmlEX'] = window['pdf2htmlEX'] || {}), document);
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pdf2htmlEX['Viewer'] = Viewer;
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