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Started paging feature
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koalyptus
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312
src-es6/modules/paging.js
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312
src-es6/modules/paging.js
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import {Dom} from '../dom';
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import {Helpers} from '../helpers';
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export class Paging{
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/**
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* Pagination component
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* @param {Object} tf TableFilter instance
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*/
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constructor(tf){
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// TableFilter configuration
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var f = tf.fObj;
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//id of container element
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this.pagingTgtId = f.paging_target_id || null;
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//defines table paging length
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this.pagingLength = !isNaN(f.paging_length) ? f.paging_length : 10;
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//id of container element
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this.resultsPerPageTgtId = f.results_per_page_target_id || null;
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//css class for paging select element
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this.pgSlcCssClass = f.paging_slc_css_class || 'pgSlc';
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//css class for paging input element
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this.pgInpCssClass = f.paging_inp_css_class || 'pgNbInp';
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//defines css class for results per page select
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this.resultsSlcCssClass = f.results_slc_css_class || 'rspg';
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//css class for label preceding results per page select
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this.resultsSpanCssClass = f.results_span_css_class || 'rspgSpan';
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//nb visible rows
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this.nbVisibleRows = 0;
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//nb hidden rows
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this.nbHiddenRows = 0;
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//1st row index of current page
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this.startPagingRow = 0;
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//total nb of pages
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this.nbPages = 0;
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//defines next page button text
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this.btnNextPageText = f.btn_next_page_text || '>';
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//defines previous page button text
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this.btnPrevPageText = f.btn_prev_page_text || '<';
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//defines last page button text
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this.btnLastPageText = f.btn_last_page_text || '>|';
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//defines first page button text
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this.btnFirstPageText = f.btn_first_page_text || '|<';
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//defines next page button html
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this.btnNextPageHtml = f.btn_next_page_html ||
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(!this.enableIcons ? null :
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'<input type="button" value="" class="'+this.btnPageCssClass +
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' nextPage" title="Next page" />');
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//defines previous page button html
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this.btnPrevPageHtml = f.btn_prev_page_html ||
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(!this.enableIcons ? null :
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'<input type="button" value="" class="'+this.btnPageCssClass +
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' previousPage" title="Previous page" />');
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//defines last page button html
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this.btnFirstPageHtml = f.btn_first_page_html ||
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(!this.enableIcons ? null :
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'<input type="button" value="" class="'+this.btnPageCssClass +
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' firstPage" title="First page" />');
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//defines previous page button html
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this.btnLastPageHtml = f.btn_last_page_html ||
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(!this.enableIcons ? null :
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'<input type="button" value="" class="'+this.btnPageCssClass +
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' lastPage" title="Last page" />');
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//defines text preceeding page selector drop-down
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this.pageText = f.page_text || ' Page ';
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//defines text after page selector drop-down
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this.ofText = f.of_text || ' of ';
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//css class for span containing tot nb of pages
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this.nbPgSpanCssClass = f.nb_pages_css_class || 'nbpg';
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//enables/disables paging buttons
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this.hasPagingBtns = f.paging_btns===false ? false : true;
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//stores paging buttons events
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this.pagingBtnEvents = null;
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//defines previous page button html
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this.pageSelectorType = f.page_selector_type || this.fltTypeSlc;
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//calls function before page is changed
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this.onBeforeChangePage = types.isFn(f.on_before_change_page) ?
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f.on_before_change_page : null;
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//calls function before page is changed
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this.onAfterChangePage = types.isFn(f.on_after_change_page) ?
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f.on_after_change_page : null;
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var start_row = this.refRow;
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var nrows = this.nbRows;
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//calculates page nb
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this.nbPages = Math.ceil((nrows-start_row)/this.pagingLength);
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var evt = tf.Evt;
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//Paging elements events
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if(!evt._Paging.next){
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var o = tf;
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evt._Paging = {// paging buttons events
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slcIndex: function(){
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return (o.pageSelectorType===o.fltTypeSlc) ?
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o.pagingSlc.options.selectedIndex :
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parseInt(o.pagingSlc.value,10)-1;
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},
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nbOpts: function(){
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return (o.pageSelectorType===o.fltTypeSlc) ?
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parseInt(o.pagingSlc.options.length,10)-1 :
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(o.nbPages-1);
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},
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next: function(){
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if(o.Evt._Paging.nextEvt){
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o.Evt._Paging.nextEvt();
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}
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var nextIndex =
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o.Evt._Paging.slcIndex()<o.Evt._Paging.nbOpts() ?
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o.Evt._Paging.slcIndex()+1 : 0;
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o.ChangePage(nextIndex);
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},
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prev: function(){
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if(o.Evt._Paging.prevEvt){
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o.Evt._Paging.prevEvt();
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}
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var prevIndex = o.Evt._Paging.slcIndex()>0 ?
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o.Evt._Paging.slcIndex()-1 : o.Evt._Paging.nbOpts();
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o.ChangePage(prevIndex);
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},
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last: function(){
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if(o.Evt._Paging.lastEvt){
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o.Evt._Paging.lastEvt();
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}
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o.ChangePage(o.Evt._Paging.nbOpts());
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},
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first: function(){
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if(o.Evt._Paging.firstEvt){
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o.Evt._Paging.firstEvt();
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}
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o.ChangePage(0);
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},
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_detectKey: function(e){
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var evt = e || global.event;
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if(evt){
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var key = o.Evt.getKeyCode(e);
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if(key===13){
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if(o.sorted){
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o.Filter();
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o.ChangePage(o.Evt._Paging.slcIndex());
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} else{
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o.ChangePage();
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}
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this.blur();
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}
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}
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},
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nextEvt: null,
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prevEvt: null,
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lastEvt: null,
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firstEvt: null
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};
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}
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this.tf = tf;
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}
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buildUI{
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var slcPages;
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var tf = this.tf;
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var evt = tf.Evt;
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// Paging drop-down list selector
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if(this.pageSelectorType === tf.fltTypeSlc){
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slcPages = dom.create(
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tf.fltTypeSlc, ['id', tf.prfxSlcPages+tf.id]);
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slcPages.className = this.pgSlcCssClass;
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slcPages.onchange = evt._OnSlcPagesChange;
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}
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// Paging input selector
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if(this.pageSelectorType === tf.fltTypeInp){
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slcPages = dom.create(
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tf.fltTypeInp,
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['id', tf.prfxSlcPages+tf.id],
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['value', tf.currentPageNb]
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);
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slcPages.className = this.pgInpCssClass;
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slcPages.onkeypress = evt._Paging._detectKey;
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}
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// btns containers
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var btnNextSpan = dom.create(
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'span',['id',this.prfxBtnNextSpan+tf.id]);
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var btnPrevSpan = dom.create(
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'span',['id',this.prfxBtnPrevSpan+tf.id]);
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var btnLastSpan = dom.create(
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'span',['id',this.prfxBtnLastSpan+tf.id]);
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var btnFirstSpan = dom.create(
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'span',['id',this.prfxBtnFirstSpan+tf.id]);
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if(this.hasPagingBtns){
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// Next button
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if(!this.btnNextPageHtml){
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var btn_next = dom.create(
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tf.fltTypeInp,['id',tf.prfxBtnNext+tf.id],
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['type','button'],
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['value',this.btnNextPageText],
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['title','Next']
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);
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btn_next.className = this.btnPageCssClass;
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btn_next.onclick = evt._Paging.next;
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btnNextSpan.appendChild(btn_next);
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} else {
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btnNextSpan.innerHTML = this.btnNextPageHtml;
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btnNextSpan.onclick = evt._Paging.next;
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}
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// Previous button
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if(!this.btnPrevPageHtml){
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var btn_prev = dom.create(
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tf.fltTypeInp,
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['id',tf.prfxBtnPrev+tf.id],
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['type','button'],
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['value',this.btnPrevPageText],
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['title','Previous']
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);
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btn_prev.className = this.btnPageCssClass;
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btn_prev.onclick = evt._Paging.prev;
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btnPrevSpan.appendChild(btn_prev);
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} else {
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btnPrevSpan.innerHTML = this.btnPrevPageHtml;
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btnPrevSpan.onclick = evt._Paging.prev;
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}
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// Last button
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if(!this.btnLastPageHtml){
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var btn_last = dom.create(
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tf.fltTypeInp,
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['id',tf.prfxBtnLast+tf.id],
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['type','button'],
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['value',this.btnLastPageText],
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['title','Last']
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);
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btn_last.className = this.btnPageCssClass;
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btn_last.onclick = evt._Paging.last;
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btnLastSpan.appendChild(btn_last);
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} else {
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btnLastSpan.innerHTML = this.btnLastPageHtml;
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btnLastSpan.onclick = evt._Paging.last;
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}
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// First button
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if(!this.btnFirstPageHtml){
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var btn_first = dom.create(
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tf.fltTypeInp,
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['id',tf.prfxBtnFirst+tf.id],
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['type','button'],
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['value',this.btnFirstPageText],
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['title','First']
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);
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btn_first.className = this.btnPageCssClass;
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btn_first.onclick = evt._Paging.first;
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btnFirstSpan.appendChild(btn_first);
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} else {
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btnFirstSpan.innerHTML = this.btnFirstPageHtml;
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btnFirstSpan.onclick = evt._Paging.first;
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}
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}
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// paging elements (buttons+drop-down list) are added to defined element
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if(!this.pagingTgtId){
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tf.SetTopDiv();
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}
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var targetEl = !this.pagingTgtId ? tf.mDiv : dom.id(this.pagingTgtId);
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/***
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if paging previously removed this prevents IE memory leak with
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removeChild used in RemovePaging method. For more info refer to
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http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2840253&SiteID=1
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***/
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if (targetEl.innerHTML!==''){
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targetEl.innerHTML = '';
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}
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/*** ***/
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targetEl.appendChild(btnFirstSpan);
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targetEl.appendChild(btnPrevSpan);
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var pgBeforeSpan = dom.create(
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'span',['id', tf.prfxPgBeforeSpan+tf.id] );
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pgBeforeSpan.appendChild( dom.text(this.pageText) );
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pgBeforeSpan.className = this.nbPgSpanCssClass;
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targetEl.appendChild(pgBeforeSpan);
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targetEl.appendChild(slcPages);
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var pgAfterSpan = dom.create(
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'span',['id', tf.prfxPgAfterSpan+tf.id]);
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pgAfterSpan.appendChild( dom.text(this.ofText) );
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pgAfterSpan.className = this.nbPgSpanCssClass;
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targetEl.appendChild(pgAfterSpan);
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var pgspan = dom.create( 'span',['id', tf.prfxPgSpan+tf.id] );
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pgspan.className = this.nbPgSpanCssClass;
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pgspan.appendChild( dom.text(' '+this.nbPages+' ') );
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targetEl.appendChild(pgspan);
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targetEl.appendChild(btnNextSpan);
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targetEl.appendChild(btnLastSpan);
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this.pagingSlc = dom.id(tf.prfxSlcPages+tf.id);
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/*====================================================
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- onchange event for paging select
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=====================================================*/
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if(!evt._OnSlcPagesChange){
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evt._OnSlcPagesChange = function(){
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if(evt._Paging._OnSlcPagesChangeEvt){
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evt._Paging._OnSlcPagesChangeEvt();
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}
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tf.ChangePage();
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this.blur();
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//ie only: blur is not enough...
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if(this.parentNode && Helpers.isIE()){
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this.parentNode.focus();
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}
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};
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}
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}
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}
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