calibre/resources/viewer/referencing.js

73 lines
2.5 KiB
JavaScript

/*
* reference management
* Copyright 2008 Kovid Goyal
* License: GNU GPL v3
*/
var reference_old_bgcol = "transparent";
var reference_prefix = "1.";
var reference_last_highlighted_para = null;
function show_reference_panel(ref) {
panel = $("#calibre_reference_panel");
if (panel.length < 1) {
$(document.body).append('<div id="calibre_reference_panel" style="top:20px; left:20px; padding-left:30px; padding-right:30px; font:monospace normal;text-align:center; z-index:10000; background: beige; border:red ridge 2px; position:absolute; color: black"><h5>Paragraph</h5><p style="text-indent:0pt">None</p></div>');
panel = $("#calibre_reference_panel");
}
$("> p", panel).text(ref);
panel.css({top:(window.pageYOffset+20)+"px", left:(window.pageXOffset+20)+"px"});
panel.fadeIn(500);
}
function toggle_reference(e) {
p = $(this);
if (e.type == "mouseenter") {
reference_old_bgcol = p.css("background-color");
reference_last_highlighted_para = p;
p.css({backgroundColor:"beige"});
var i = 0;
var paras = $("p");
for (j = 0; j < paras.length; j++,i++) {
if (paras[j] == p[0]) break;
}
show_reference_panel(reference_prefix+(i+1) );
} else {
p.css({backgroundColor:reference_old_bgcol});
panel = $("#calibre_reference_panel").hide();
reference_last_highlighted_para = null;
}
return false;
}
function enter_reference_mode() {
$("p").bind("mouseenter mouseleave", toggle_reference);
}
function leave_reference_mode() {
$("p").unbind("mouseenter mouseleave", toggle_reference);
panel = $("#calibre_reference_panel");
if (panel.length > 0) panel.hide();
if (reference_last_highlighted_para !== null)
reference_last_highlighted_para.css({backgroundColor:reference_old_bgcol});
}
function goto_reference(ref) {
var tokens = ref.split(".");
if (tokens.length != 2) {alert("Invalid reference: "+ref); return;}
var num = parseInt(tokens[1]);
if (isNaN(num)) {alert("Invalid reference: "+ref); return;}
num -= 1;
if (num < 0) {alert("Invalid reference: "+ref); return;}
var p = $("p");
if (num >= p.length) {alert("Reference not found: "+ref); return;}
var dest = $(p[num]);
if (window.paged_display.in_paged_mode) {
var xpos = dest.offset().left;
window.paged_display.scroll_to_xpos(xpos, true, true, 1000);
} else
$.scrollTo(dest, 1000,
{onAfter:function(){window.py_bridge.animated_scroll_done();}});
}