summaryrefslogtreecommitdiffstats
path: root/productmenu.js
diff options
context:
space:
mode:
Diffstat (limited to 'productmenu.js')
-rw-r--r--productmenu.js242
1 files changed, 242 insertions, 0 deletions
diff --git a/productmenu.js b/productmenu.js
new file mode 100644
index 000000000..d917d325c
--- /dev/null
+++ b/productmenu.js
@@ -0,0 +1,242 @@
+// Adds to the target select object all elements in array that
+// correspond to the elements selected in source.
+// - array should be a array of arrays, indexed by product name. the
+// array should contain the elements that correspont to that
+// product. Example:
+// var array = Array();
+// array['ProductOne'] = [ 'ComponentA', 'ComponentB' ];
+// updateSelect(array, source, target);
+// - sel is a list of selected items, either whole or a diff
+// depending on sel_is_diff.
+// - sel_is_diff determines if we are sending in just a diff or the
+// whole selection. a diff is used to optimize adding selections.
+// - target should be the target select object.
+// - single specifies if we selected a single item. if we did, no
+// need to merge.
+
+function updateSelect( array, sel, target, sel_is_diff, single, blank ) {
+
+ var i, j, comp;
+
+ // if single, even if it's a diff (happens when you have nothing
+ // selected and select one item alone), skip this.
+ if ( ! single ) {
+
+ // array merging/sorting in the case of multiple selections
+ if ( sel_is_diff ) {
+
+ // merge in the current options with the first selection
+ comp = merge_arrays( array[sel[0]], target.options, 1 );
+
+ // merge the rest of the selection with the results
+ for ( i = 1 ; i < sel.length ; i++ ) {
+ comp = merge_arrays( array[sel[i]], comp, 0 );
+ }
+ } else {
+ // here we micro-optimize for two arrays to avoid merging with a
+ // null array
+ comp = merge_arrays( array[sel[0]],array[sel[1]], 0 );
+
+ // merge the arrays. not very good for multiple selections.
+ for ( i = 2; i < sel.length; i++ ) {
+ comp = merge_arrays( comp, array[sel[i]], 0 );
+ }
+ }
+ } else {
+ // single item in selection, just get me the list
+ comp = array[sel[0]];
+ }
+
+ // save the selection in the target select so we can restore it later
+ var selections = new Array();
+ for ( i = 0; i < target.options.length; i++ )
+ if (target.options[i].selected) selections.push(target.options[i].value);
+
+ // clear select
+ target.options.length = 0;
+
+ // add empty "Any" value back to the list
+ if (blank) target.options[0] = new Option( blank, "" );
+
+ // load elements of list into select
+ for ( i = 0; i < comp.length; i++ ) {
+ target.options[target.options.length] = new Option( comp[i], comp[i] );
+ }
+
+ // restore the selection
+ for ( i=0 ; i<selections.length ; i++ )
+ for ( j=0 ; j<target.options.length ; j++ )
+ if (target.options[j].value == selections[i]) target.options[j].selected = true;
+
+}
+
+// Returns elements in a that are not in b.
+// NOT A REAL DIFF: does not check the reverse.
+// - a,b: arrays of values to be compare.
+
+function fake_diff_array( a, b ) {
+ var newsel = new Array();
+
+ // do a boring array diff to see who's new
+ for ( var ia in a ) {
+ var found = 0;
+ for ( var ib in b ) {
+ if ( a[ia] == b[ib] ) {
+ found = 1;
+ }
+ }
+ if ( ! found ) {
+ newsel[newsel.length] = a[ia];
+ }
+ found = 0;
+ }
+ return newsel;
+ }
+
+// takes two arrays and sorts them by string, returning a new, sorted
+// array. the merge removes dupes, too.
+// - a, b: arrays to be merge.
+// - b_is_select: if true, then b is actually an optionitem and as
+// such we need to use item.value on it.
+
+ function merge_arrays( a, b, b_is_select ) {
+ var pos_a = 0;
+ var pos_b = 0;
+ var ret = new Array();
+ var bitem, aitem;
+
+ // iterate through both arrays and add the larger item to the return
+ // list. remove dupes, too. Use toLowerCase to provide
+ // case-insensitivity.
+
+ while ( ( pos_a < a.length ) && ( pos_b < b.length ) ) {
+
+ if ( b_is_select ) {
+ bitem = b[pos_b].value;
+ } else {
+ bitem = b[pos_b];
+ }
+ aitem = a[pos_a];
+
+ // smaller item in list a
+ if ( aitem.toLowerCase() < bitem.toLowerCase() ) {
+ ret[ret.length] = aitem;
+ pos_a++;
+ } else {
+ // smaller item in list b
+ if ( aitem.toLowerCase() > bitem.toLowerCase() ) {
+ ret[ret.length] = bitem;
+ pos_b++;
+ } else {
+ // list contents are equal, inc both counters.
+ ret[ret.length] = aitem;
+ pos_a++;
+ pos_b++;
+ }
+ }
+ }
+
+ // catch leftovers here. these sections are ugly code-copying.
+ if ( pos_a < a.length ) {
+ for ( ; pos_a < a.length ; pos_a++ ) {
+ ret[ret.length] = a[pos_a];
+ }
+ }
+
+ if ( pos_b < b.length ) {
+ for ( ; pos_b < b.length; pos_b++ ) {
+ if ( b_is_select ) {
+ bitem = b[pos_b].value;
+ } else {
+ bitem = b[pos_b];
+ }
+ ret[ret.length] = bitem;
+ }
+ }
+ return ret;
+ }
+
+// selectProduct reads the selection from f[productfield] and updates
+// f.version, component and target_milestone accordingly.
+// - f: a form containing product, component, varsion and
+// target_milestone select boxes.
+// globals (3vil!):
+// - cpts, vers, tms: array of arrays, indexed by product name. the
+// subarrays contain a list of names to be fed to the respective
+// selectboxes. For bugzilla, these are generated with perl code
+// at page start.
+// - usetms: this is a global boolean that is defined if the
+// bugzilla installation has it turned on. generated in perl too.
+// - first_load: boolean, specifying if it's the first time we load
+// the query page.
+// - last_sel: saves our last selection list so we know what has
+// changed, and optimize for additions.
+
+function selectProduct( f , productfield, componentfield, blank ) {
+
+ // this is to avoid handling events that occur before the form
+ // itself is ready, which happens in buggy browsers.
+
+ if ( ( !f ) || ( ! f[productfield] ) ) {
+ return;
+ }
+
+ // if this is the first load and nothing is selected, no need to
+ // merge and sort all components; perl gives it to us sorted.
+
+ if ( ( first_load ) && ( f[productfield].selectedIndex == -1 ) ) {
+ first_load = 0;
+ return;
+ }
+
+ // turn first_load off. this is tricky, since it seems to be
+ // redundant with the above clause. It's not: if when we first load
+ // the page there is _one_ element selected, it won't fall into that
+ // clause, and first_load will remain 1. Then, if we unselect that
+ // item, selectProduct will be called but the clause will be valid
+ // (since selectedIndex == -1), and we will return - incorrectly -
+ // without merge/sorting.
+
+ first_load = 0;
+
+ // - sel keeps the array of products we are selected.
+ // - is_diff says if it's a full list or just a list of products that
+ // were added to the current selection.
+ // - single indicates if a single item was selected
+ var sel = Array();
+ var is_diff = 0;
+ var single;
+
+ // if nothing selected, pick all
+ if ( f[productfield].selectedIndex == -1 ) {
+ for ( var i = 0 ; i < f[productfield].length ; i++ ) {
+ sel[sel.length] = f[productfield].options[i].value;
+ }
+ single = 0;
+ } else {
+
+ for ( i = 0 ; i < f[productfield].length ; i++ ) {
+ if ( f[productfield].options[i].selected ) {
+ sel[sel.length] = f[productfield].options[i].value;
+ }
+ }
+
+ single = ( sel.length == 1 );
+
+ // save last_sel before we kill it
+ var tmp = last_sel;
+ last_sel = sel;
+
+ // this is an optimization: if we've added components, no need
+ // to remerge them; just merge the new ones with the existing
+ // options.
+
+ if ( ( tmp ) && ( tmp.length < sel.length ) ) {
+ sel = fake_diff_array(sel, tmp);
+ is_diff = 1;
+ }
+ }
+
+ // do the actual fill/update
+ updateSelect( cpts, sel, f[componentfield], is_diff, single, blank );
+}