add search

The added input lets you select by *oring* multiple space less
expressions. i.e. 'a b' will find all nodes with name containing either
'a' or 'b'. Not the specification, will be remedied later (i.e. maybe
tomorrow, who knows).

excuse the bulk commit, this does 3 things:

splits off selection logic into src/view/selection
 - handles setting state explicityl on Node's, still bad.
 - bad at least the 'selected' state (i.e. boolean) is in one place.
 - common point for clicking on nodes/edges and selecting view selection
   input

makes graph.getConnectedNodesAndLinks accept an array and not just a
single node

implements the search functionality outlined in the first paragraph.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/view/selection.js b/src/view/selection.js
new file mode 100644
index 00000000..57f2443d
--- /dev/null
+++ b/src/view/selection.js
@@ -0,0 +1,80 @@
+define(['rz_core'],
+function(rz_core) {
+
+function get_rz_core()
+{
+    // circular dependency on rz_core, so require.js cannot solve it.
+    if (rz_core === undefined) {
+        rz_core = require('rz_core');
+    }
+    return rz_core;
+}
+
+var selection = false;
+
+function byVisitors(node_selector, link_selector) {
+    selection = true;
+    var selected_nodes = get_rz_core().graph.findByVisitors(node_selector, link_selector);
+
+    clear();
+    connectedComponent(selected_nodes);
+}
+
+function connectedComponent(nodes) {
+    var nodes,
+        connected = get_rz_core().graph.getConnectedNodesAndLinks(nodes, 1),
+        i,
+        node,
+        link,
+        data;
+
+    selection = true;
+    nodes.forEach(function (n) { n.state = 'chosen'; });
+
+    for (i = 0 ; i < connected.nodes.length ; ++i) {
+        data = connected.nodes[i];
+        node = data.node;
+        switch (data.type) {
+        case 'exit':
+            node.state = 'exit';
+            break;
+        case 'enter':
+            node.state = 'enter';
+            break;
+        };
+    }
+    for (i = 0 ; i < connected.links.length ; ++i) {
+        data = connected.links[i];
+        link = data.link;
+        switch (data.type) {
+        case 'exit':
+            link.state = 'exit';
+            break;
+        case 'enter':
+            link.state = 'enter';
+            break;
+        };
+    }
+}
+
+var node_selected = function(node) {
+    return node.state == 'chosen' || node.state == 'enter' || node.state == 'exit' || node.state == 'selected';
+}
+
+var selected_class = function(node) {
+    return selection ? (node_selected(node) ? "selected" : "notselected") : "";
+}
+
+var clear = function() {
+    selection = false;
+    get_rz_core().graph.setRegularState();
+}
+
+return {
+    'byVisitors': byVisitors,
+    'connectedComponent': connectedComponent,
+    'clear': clear,
+    'selected_class': selected_class,
+};
+
+});