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// Adds to the target select object all elements in array that
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// correspond to the elements selected in source.
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// - array should be a array of arrays, indexed by product name. the
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// array should contain the elements that correspont to that
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// var array = Array();
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// array['ProductOne'] = [ 'ComponentA', 'ComponentB' ];
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// updateSelect(array, source, target);
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// - sel is a list of selected items, either whole or a diff
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// depending on sel_is_diff.
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// - sel_is_diff determines if we are sending in just a diff or the
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// whole selection. a diff is used to optimize adding selections.
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// - target should be the target select object.
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// - single specifies if we selected a single item. if we did, no
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function updateSelect( array, sel, target, sel_is_diff, single, blank ) {
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// if single, even if it's a diff (happens when you have nothing
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// selected and select one item alone), skip this.
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// array merging/sorting in the case of multiple selections
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// merge in the current options with the first selection
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comp = merge_arrays( array[sel[0]], target.options, 1 );
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// merge the rest of the selection with the results
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for ( i = 1 ; i < sel.length ; i++ ) {
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comp = merge_arrays( array[sel[i]], comp, 0 );
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// here we micro-optimize for two arrays to avoid merging with a
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comp = merge_arrays( array[sel[0]],array[sel[1]], 0 );
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// merge the arrays. not very good for multiple selections.
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for ( i = 2; i < sel.length; i++ ) {
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comp = merge_arrays( comp, array[sel[i]], 0 );
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// single item in selection, just get me the list
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// save the selection in the target select so we can restore it later
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var selections = new Array();
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for ( i = 0; i < target.options.length; i++ )
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if (target.options[i].selected) selections.push(target.options[i].value);
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target.options.length = 0;
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// add empty "Any" value back to the list
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if (blank) target.options[0] = new Option( blank, "" );
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// load elements of list into select
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for ( i = 0; i < comp.length; i++ ) {
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target.options[target.options.length] = new Option( comp[i], comp[i] );
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// restore the selection
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for ( i=0 ; i<selections.length ; i++ )
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for ( j=0 ; j<target.options.length ; j++ )
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if (target.options[j].value == selections[i]) target.options[j].selected = true;
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// Returns elements in a that are not in b.
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// NOT A REAL DIFF: does not check the reverse.
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// - a,b: arrays of values to be compare.
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function fake_diff_array( a, b ) {
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var newsel = new Array();
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// do a boring array diff to see who's new
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if ( a[ia] == b[ib] ) {
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newsel[newsel.length] = a[ia];
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// takes two arrays and sorts them by string, returning a new, sorted
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// array. the merge removes dupes, too.
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// - a, b: arrays to be merge.
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// - b_is_select: if true, then b is actually an optionitem and as
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// such we need to use item.value on it.
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function merge_arrays( a, b, b_is_select ) {
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var ret = new Array();
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// iterate through both arrays and add the larger item to the return
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// list. remove dupes, too. Use toLowerCase to provide
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// case-insensitivity.
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while ( ( pos_a < a.length ) && ( pos_b < b.length ) ) {
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bitem = b[pos_b].value;
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// smaller item in list a
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if ( aitem.toLowerCase() < bitem.toLowerCase() ) {
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ret[ret.length] = aitem;
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// smaller item in list b
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if ( aitem.toLowerCase() > bitem.toLowerCase() ) {
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ret[ret.length] = bitem;
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// list contents are equal, inc both counters.
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ret[ret.length] = aitem;
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// catch leftovers here. these sections are ugly code-copying.
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if ( pos_a < a.length ) {
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for ( ; pos_a < a.length ; pos_a++ ) {
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ret[ret.length] = a[pos_a];
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if ( pos_b < b.length ) {
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for ( ; pos_b < b.length; pos_b++ ) {
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bitem = b[pos_b].value;
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ret[ret.length] = bitem;
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// selectProduct reads the selection from f[productfield] and updates
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// f.version, component and target_milestone accordingly.
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// - f: a form containing product, component, varsion and
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// target_milestone select boxes.
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// - cpts, vers, tms: array of arrays, indexed by product name. the
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// subarrays contain a list of names to be fed to the respective
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// selectboxes. For bugzilla, these are generated with perl code
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// - usetms: this is a global boolean that is defined if the
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// bugzilla installation has it turned on. generated in perl too.
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// - first_load: boolean, specifying if it's the first time we load
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// - last_sel: saves our last selection list so we know what has
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// changed, and optimize for additions.
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function selectProduct( f , productfield, componentfield, blank ) {
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// this is to avoid handling events that occur before the form
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// itself is ready, which happens in buggy browsers.
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if ( ( !f ) || ( ! f[productfield] ) ) {
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// Do nothing if no products are defined (this avoids the
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// "a has no properties" error from merge_arrays function)
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if (f[productfield].length == blank ? 1 : 0) {
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// if this is the first load and nothing is selected, no need to
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// merge and sort all components; perl gives it to us sorted.
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if ( ( first_load ) && ( f[productfield].selectedIndex == -1 ) ) {
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// turn first_load off. this is tricky, since it seems to be
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// redundant with the above clause. It's not: if when we first load
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// the page there is _one_ element selected, it won't fall into that
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// clause, and first_load will remain 1. Then, if we unselect that
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// item, selectProduct will be called but the clause will be valid
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// (since selectedIndex == -1), and we will return - incorrectly -
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// without merge/sorting.
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// - sel keeps the array of products we are selected.
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// - is_diff says if it's a full list or just a list of products that
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// were added to the current selection.
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// - single indicates if a single item was selected
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// - selectedIndex is the index of the first selected item
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// - selectedValue is the value of the first selected item
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var selectedIndex = f[productfield].selectedIndex;
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var selectedValue = f[productfield].options[selectedIndex].value;
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// If nothing is selected, or the selected item is the "blank" value
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// at the top of the list which represents all products on drop-down menus,
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// then pick all products so we show all components.
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if ( selectedIndex == -1 || !cpts[selectedValue])
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for ( var i = blank ? 1 : 0 ; i < f[productfield].length ; i++ ) {
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sel[sel.length] = f[productfield].options[i].value;
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// If there is only one product, then only one product can be selected
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single = ( sel.length == 1 );
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for ( i = blank ? 1 : 0 ; i < f[productfield].length ; i++ ) {
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if ( f[productfield].options[i].selected ) {
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sel[sel.length] = f[productfield].options[i].value;
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single = ( sel.length == 1 );
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// save last_sel before we kill it
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// this is an optimization: if we've added components, no need
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// to remerge them; just merge the new ones with the existing
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if ( ( tmp ) && ( tmp.length < sel.length ) ) {
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sel = fake_diff_array(sel, tmp);
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// do the actual fill/update
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updateSelect( cpts, sel, f[componentfield], is_diff, single, blank );
added
removed
productmenu.js
