yetangitu/canvas-based-HTML5-Comic-Book-Reader
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created functions for get/set hash

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This commit is contained in:
Bala Clark 2011-08-28 19:22:38 +02:00
parent f821168360
commit 3759157f6b
1 changed files with 19 additions and 7 deletions
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24
lib/ComicBook.js Normal file → Executable file
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@ -70,7 +70,7 @@ function ComicBook(id, srcs, opts) {
**/ **/
function checkHash() { function checkHash() {
var hash = parseInt(location.hash.substring(1),10) - 1 || 0; var hash = getHash();
if (hash !== pointer && loaded.indexOf(hash) > -1) { if (hash !== pointer && loaded.indexOf(hash) > -1) {
pointer = hash; pointer = hash;
@ -78,6 +78,20 @@ function ComicBook(id, srcs, opts) {
} }
} }
function getHash() {
return parseInt(location.hash.substring(1),10) - 1 || 0;
}
function setHash() {
var pageNo = pointer + 1;
if (getHash() !== '#'+pageNo) {
location.hash = pageNo;
if (options.savePosition === true) { setLastPage(pageNo); };
}
}
/** /**
* Figure out the cursor position relative to the canvas. * Figure out the cursor position relative to the canvas.
* *
@ -104,9 +118,9 @@ function ComicBook(id, srcs, opts) {
/** /**
* Tell the library app where the user is up to * Tell the library app where the user is up to
**/ **/
function setLastPage() { function setLastPage(pageNo) {
if (!options.data.comicId) { throw 'options.data.comicId is not set.'; } if (!options.data.comicId) { throw 'options.data.comicId is not set.'; }
$.post('/comic/setlastpage', { page: pointer+1, comic: options.data.comicId }); $.post('/comic/setlastpage', { page: pageNo, comic: options.data.comicId });
} }
/** /**
@ -220,8 +234,6 @@ function ComicBook(id, srcs, opts) {
var page = pages[pointer]; var page = pages[pointer];
var page2 = pages[pointer + 1]; var page2 = pages[pointer + 1];
if (options.savePosition === true) { setLastPage(); };
if (typeof page !== "object") { throw "invalid page type '"+ typeof page +"'"; } if (typeof page !== "object") { throw "invalid page type '"+ typeof page +"'"; }
var width = page.width; var width = page.width;
@ -299,7 +311,7 @@ function ComicBook(id, srcs, opts) {
context.drawImage(page, offsetW, offsetH, page_width, page_height); context.drawImage(page, offsetW, offsetH, page_width, page_height);
if (options.displayMode === "double" && typeof page2 === "object") { context.drawImage(page2, page_width + offsetW, offsetH, page_width, page_height); } if (options.displayMode === "double" && typeof page2 === "object") { context.drawImage(page2, page_width + offsetW, offsetH, page_width, page_height); }
location.hash = pointer + 1; setHash(pointer + 1);
// apply any image enhancements previously defined // apply any image enhancements previously defined
$.each(options.enhance, function(action, options) { $.each(options.enhance, function(action, options) {