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/* |
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no pager, as seen at |
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http://www.humanized.com/weblog/2006/04/28/reading_humanized/ |
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but using jquery |
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|
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2006-08-16 Dobrica Pavlinusic <dpavlin@rot13.org> |
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*/ |
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|
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var preloadDistance = 1000; |
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var isUpdating = false; |
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var isMouseDown = false; |
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var checker; |
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var v; |
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var cookie = 'no_pager'; |
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|
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function load_next_page() { |
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|
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setCookie(cookie+"_height", getScrollHeight() ); |
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setCookie(cookie+"_scroll", getScrollHeight() - _getWindowHeight() ); |
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|
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if ( isUpdating == true |
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|| isMouseDown == true |
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|| getPageHeight() - getScrollHeight() > preloadDistance |
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|| v.page >= v.max_page |
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) return; |
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|
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v.page++; |
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|
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$.log.info( |
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'get page: ' + v.page, |
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'search: ' + v.search, |
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'PageHeight:' + getPageHeight(), |
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'ScrollHeight:' + getScrollHeight() |
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); |
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|
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setCookie( cookie+'_page', v.page ); |
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isUpdating = true; |
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|
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var old_status = $('#status').html; |
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|
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$('#status').html( |
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'Loading page '+ v.page + '...' |
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); |
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|
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console.log( 'v = ', v ); |
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|
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$.get( |
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"/Frey::View::NoPager/results_as_markup", |
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{ |
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page: v.page, |
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search: v.search |
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}, |
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function ( response ) { |
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$('#next_page').html( response ); |
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|
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var resp_v; |
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eval( 'resp_v=' + $('#json').val() ); |
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console.log( 'resp_v = ', resp_v ); |
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|
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// restore status line |
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$('#status').html( resp_v.status || old_status ); |
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|
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isUpdating = 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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|
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/* |
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bind events and init no_pager |
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*/ |
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|
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$(document).ready( function() { |
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|
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$.log.info('no_page binding events'); |
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|
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eval( 'v=' + $('#json').val() ); |
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|
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var cookie_id = getCookie(cookie+'_id') || 0; |
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|
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console.debug( v ); |
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$.log.debug("Page Cookie:" + cookie_id); |
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|
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var fromBackButton = false; |
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if ( cookie_id == v.id ) { |
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fromBackButton = true; |
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} else { |
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setCookie(cookie+'_id', v.id); |
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} |
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|
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$.log.debug("from Back button? " + fromBackButton); |
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if ( fromBackButton ) { |
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$.log.info( 'Load ' + getCookie(cookie+'_page') + ' pages'); |
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$.log.debug( 'Scroll to:' + getCookie(cookie+'_scroll') ); |
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$('#spacer').height( getCookie(cookie+'_height')+"px" ); |
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scroll( 0, getCookie(cookie+'_scroll') ); |
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} |
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|
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$(window).mousedown( function () { |
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isMouseDown = true; |
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}); |
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$(window).mouseup( function () { |
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isMouseDown = false; |
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}); |
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|
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checker = setInterval(function () { |
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load_next_page(); |
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}, 100); |
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|
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|
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}); |
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|
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|
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|
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// These three functions are taken from code displayed on |
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// http://www.netspade.com/articles/2005/11/16/javascript-cookies/ |
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|
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/** |
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* Sets a Cookie with the given name and value. |
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* |
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* name Name of the cookie |
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* value Value of the cookie |
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* [expires] Expiration date of the cookie (default: end of current session) |
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* [path] Path where the cookie is valid (default: path of calling document) |
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* [domain] Domain where the cookie is valid |
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* (default: domain of calling document) |
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* [secure] Boolean value indicating if the cookie transmission requires a |
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* secure transmission |
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*/ |
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function setCookie(name, value, expires, path, domain, secure) { |
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document.cookie= name + "=" + escape(value) + |
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((expires) ? "; expires=" + expires.toGMTString() : "") + |
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((path) ? "; path=" + path : "") + |
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((domain) ? "; domain=" + domain : "") + |
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((secure) ? "; secure" : ""); |
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} |
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|
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/** |
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* Gets the value of the specified cookie. |
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* |
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* name Name of the desired cookie. |
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* |
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* Returns a string containing value of specified cookie, |
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* or null if cookie does not exist. |
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*/ |
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function getCookie(name) { |
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var dc = document.cookie; |
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var prefix = name + "="; |
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var begin = dc.indexOf("; " + prefix); |
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if (begin == -1) { |
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begin = dc.indexOf(prefix); |
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if (begin != 0) return null; |
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} else { |
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begin += 2; |
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} |
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var end = document.cookie.indexOf(";", begin); |
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if (end == -1) { |
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end = dc.length; |
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} |
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return unescape(dc.substring(begin + prefix.length, end)); |
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} |
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|
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/** |
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* Deletes the specified cookie. |
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* |
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* name name of the cookie |
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* [path] path of the cookie (must be same as path used to create cookie) |
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* [domain] domain of the cookie (must be same as domain used to create cookie) |
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*/ |
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function deleteCookie(name, path, domain) { |
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if (getCookie(name)) { |
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document.cookie = name + "=" + |
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((path) ? "; path=" + path : "") + |
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((domain) ? "; domain=" + domain : "") + |
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"; expires=Thu, 01-Jan-70 00:00:01 GMT"; |
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} |
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} |
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|
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// These two functions are based on code from |
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// http://www.quirksmode.org/viewport/compatibility.html |
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|
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function getPageHeight(){ |
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var y; |
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var test1 = document.body.scrollHeight; |
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var test2 = document.body.offsetHeight |
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if (test1 > test2) // all but Explorer Mac |
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{ |
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y = document.body.scrollHeight; |
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} |
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else // Explorer Mac; |
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//would also work in Explorer 6 Strict, Mozilla and Safari |
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{ |
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y = document.body.offsetHeight; |
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} |
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return parseInt(y); |
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} |
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|
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function _getWindowHeight(){ |
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var frameWidth; |
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var frameHeight; |
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if (self.innerWidth) |
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{ |
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frameWidth = self.innerWidth; |
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frameHeight = self.innerHeight; |
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} |
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else if (document.documentElement && document.documentElement.clientWidth) |
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{ |
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frameWidth = document.documentElement.clientWidth; |
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frameHeight = document.documentElement.clientHeight; |
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} |
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else if (document.body) |
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{ |
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frameWidth = document.body.clientWidth; |
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frameHeight = document.body.clientHeight; |
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} |
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return parseInt(frameHeight); |
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} |
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|
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|
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function getScrollHeight(){ |
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var y; |
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// all except Explorer |
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if (self.pageYOffset) |
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{ |
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y = self.pageYOffset; |
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} |
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else if (document.documentElement && document.documentElement.scrollTop) |
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{ |
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y = document.documentElement.scrollTop; |
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} |
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else if (document.body) // all other Explorers |
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{ |
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y = document.body.scrollTop; |
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} |
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return parseInt(y)+_getWindowHeight(); |
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} |
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