417 lines
11 KiB
JavaScript
Executable file
417 lines
11 KiB
JavaScript
Executable file
/*!
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* jqPagination, a jQuery pagination plugin (obviously)
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* Version: 1.3 (26th July 2013)
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*
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* Copyright (C) 2013 Ben Everard
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*
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* http://beneverard.github.com/jqPagination
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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(function ($) {
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"use strict";
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$.jqPagination = function (el, options) {
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// To avoid scope issues, use 'base' instead of 'this'
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// to reference this class from internal events and functions.
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var base = this;
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// Access to jQuery and DOM versions of element
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base.$el = $(el);
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base.el = el;
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// get input jQuery object
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base.$input = base.$el.find('input');
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// Add a reverse reference to the DOM object
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base.$el.data("jqPagination", base);
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base.init = function () {
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base.options = $.extend({}, $.jqPagination.defaultOptions, options);
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// if the user hasn't provided a max page number in the options try and find
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// the data attribute for it, if that cannot be found, use one as a max page number
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if (base.options.max_page === null) {
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if (base.$input.data('max-page') !== undefined) {
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base.options.max_page = base.$input.data('max-page');
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} else {
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base.options.max_page = 1;
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}
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}
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// if the current-page data attribute is specified this takes priority
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// over the options passed in, so long as it's a number
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if (base.$input.data('current-page') !== undefined && base.isNumber(base.$input.data('current-page'))) {
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base.options.current_page = base.$input.data('current-page');
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}
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// remove the readonly attribute as JavaScript must be working by now ;-)
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base.$input.removeAttr('readonly');
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// set the initial input value
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// pass true to prevent paged callback form being fired
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base.updateInput(true);
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//***************
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// BIND EVENTS
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base.$input.on('focus.jqPagination mouseup.jqPagination', function (event) {
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// if event === focus, select all text...
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if (event.type === 'focus') {
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var current_page = parseInt(base.options.current_page, 10);
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$(this).val(current_page).select();
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}
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// if event === mouse up, return false. Fixes Chrome bug
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if (event.type === 'mouseup') {
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return false;
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}
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});
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base.$input.on('blur.jqPagination keydown.jqPagination', function (event) {
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var $self = $(this),
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current_page = parseInt(base.options.current_page, 10);
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// if the user hits escape revert the input back to the original value
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if (event.keyCode === 27) {
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$self.val(current_page);
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$self.blur();
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}
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// if the user hits enter, trigger blur event but DO NOT set the page value
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if (event.keyCode === 13) {
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$self.blur();
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}
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// only set the page is the event is focusout.. aka blur
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if (event.type === 'blur') {
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base.setPage($self.val());
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}
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});
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base.$el.on('click.jqPagination', 'a', function (event) {
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var $self = $(this);
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// we don't want to do anything if we've clicked a disabled link
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// return false so we stop normal link action btu also drop out of this event
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if ($self.hasClass('disabled')) {
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return false;
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}
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// for mac + windows (read: other), maintain the cmd + ctrl click for new tab
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if (!event.metaKey && !event.ctrlKey) {
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event.preventDefault();
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base.setPage($self.data('action'));
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}
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});
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};
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base.setPage = function (page, prevent_paged) {
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// return current_page value if getting instead of setting
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if (page === undefined) {
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return base.options.current_page;
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}
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var current_page = parseInt(base.options.current_page, 10),
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max_page = parseInt(base.options.max_page, 10);
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if (isNaN(parseInt(page, 10))) {
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switch (page) {
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/*
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case 'first':
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page = 1;
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break;
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case 'prev':
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case 'previous':
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page = current_page - 1;
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break;
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*/
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case 'next':
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page = current_page + 1;
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break;
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/*
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case 'last':
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page = max_page;
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break;
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*/
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}
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}
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page = parseInt(page, 10);
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// reject any invalid page requests
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if (isNaN(page) || page < 1 || page > max_page) {
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// update the input element
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base.setInputValue(current_page);
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return false;
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}
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// update current page options
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base.options.current_page = page;
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base.$input.data('current-page', page);
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// update the input element
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base.updateInput( prevent_paged );
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};
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base.setMaxPage = function (max_page, prevent_paged) {
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// return the max_page value if getting instead of setting
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if (max_page === undefined) {
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return base.options.max_page;
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}
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// ignore if max_page is not a number
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if (!base.isNumber(max_page)) {
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console.error('jqPagination: max_page is not a number');
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return false;
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}
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// ignore if max_page is less than the current_page
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if (max_page < base.options.current_page) {
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console.error('jqPagination: max_page lower than current_page');
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return false;
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}
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// set max_page options
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base.options.max_page = max_page;
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base.$input.data('max-page', max_page);
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// update the input element
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base.updateInput( prevent_paged );
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};
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// ATTN this isn't really the correct name is it?
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base.updateInput = function (prevent_paged) {
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var current_page = parseInt(base.options.current_page, 10);
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// set the input value
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base.setInputValue(current_page);
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// set the link href attributes
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base.setLinks(current_page);
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// we may want to prevent the paged callback from being fired
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if (prevent_paged !== true) {
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// fire the callback function with the current page
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base.options.paged(current_page);
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}
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};
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base.setInputValue = function (page) {
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var page_string = base.options.page_string,
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max_page = base.options.max_page;
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// this looks horrible :-(
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page_string = page_string
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.replace("{current_page}", page)
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.replace("{max_page}", max_page);
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base.$input.val(page_string);
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};
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base.isNumber = function(n) {
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return !isNaN(parseFloat(n)) && isFinite(n);
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};
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base.setLinks = function (page) {
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var link_string = base.options.link_string,
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current_page = parseInt(base.options.current_page, 10),
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max_page = parseInt(base.options.max_page, 10);
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if (link_string !== '') {
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// set initial page numbers + make sure the page numbers aren't out of range
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var previous = current_page - 1;
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if (previous < 1) {
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previous = 1;
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}
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var next = current_page + 1;
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if (next > max_page) {
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next = max_page;
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}
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// apply each page number to the link string, set it back to the element href attribute
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base.$el.find('a.first').attr('href', link_string.replace('{page_number}', '1'));
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base.$el.find('a.prev, a.previous').attr('href', link_string.replace('{page_number}', previous));
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base.$el.find('a.next').attr('href', link_string.replace('{page_number}', next));
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base.$el.find('a.last').attr('href', link_string.replace('{page_number}', max_page));
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}
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// set disable class on appropriate links
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base.$el.find('a').removeClass('disabled');
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if (current_page === max_page) {
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base.$el.find('.next, .last').addClass('disabled');
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}
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if (current_page === 1) {
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base.$el.find('.previous, .first').addClass('disabled');
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}
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};
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base.callMethod = function (method, key, value) {
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switch (method.toLowerCase()) {
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case 'option':
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// set default object to trigger the paged event (legacy opperation)
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var options = {'trigger': true},
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result = false;
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// if the key passed in is an object
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if($.isPlainObject(key) && !value){
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$.extend(options, key)
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}
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else{ // make the key value pair part of the default object
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options[key] = value;
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}
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var prevent_paged = (options.trigger === false);
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// if max_page property is set call setMaxPage
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if(options.max_page !== undefined){
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result = base.setMaxPage(options.max_page, prevent_paged);
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}
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// if current_page property is set call setPage
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if(options.current_page !== undefined){
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result = base.setPage(options.current_page, prevent_paged);
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}
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// if we've not got a result fire an error and return false
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if( result === false ) console.error('jqPagination: cannot get / set option ' + key);
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return result;
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break;
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case 'destroy':
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base.$el
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.off('.jqPagination')
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.find('*')
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.off('.jqPagination');
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break;
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default:
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// the function name must not exist
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console.error('jqPagination: method "' + method + '" does not exist');
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return false;
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}
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};
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// Run initializer
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base.init();
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};
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$.jqPagination.defaultOptions = {
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current_page : 1,
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link_string : '',
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max_page : null,
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page_string : 'Question {current_page} of {max_page}',
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paged : function () {}
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};
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$.fn.jqPagination = function () {
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// get any function parameters
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var self = this,
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args = Array.prototype.slice.call(arguments),
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result = false;
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// if the first argument is a string call the desired function
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// note: we can only do this to a single element, and not a collection of elements
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if (typeof args[0] === 'string') {
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// if we're dealing with multiple elements, set for all
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$.each(self, function(){
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var $plugin = $(this).data('jqPagination');
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result = $plugin.callMethod(args[0], args[1], args[2]);
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});
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return result;
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}
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// if we're not dealing with a method, initialise plugin
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self.each(function () {
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(new $.jqPagination(this, args[0]));
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});
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};
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})(jQuery);
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// polyfill, provide a fallback if the console doesn't exist
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if (!console) {
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var console = {},
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func = function () { return false; };
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console.log = func;
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console.info = func;
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console.warn = func;
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console.error = func;
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}
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