From 91b171e7584920d03abb9c45e779c84f3dee975c Mon Sep 17 00:00:00 2001
From: "myk%mozilla.org" <>
Date: Sun, 29 Sep 2002 01:42:23 +0000
Subject: Fix for bug 98801: Implementation of the request tracker, a set of
 enhancements to attachment statuses. r=gerv,bbaetz

---
 productmenu.js | 242 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 242 insertions(+)
 create mode 100644 productmenu.js

(limited to 'productmenu.js')

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 );
+}
-- 
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