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- Incorporated new sidebar which contains the shelf and navigator (tree) components
- Changed version number to 2.0.0 (dev) git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4538 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Gavin Cornwell
@@ -0,0 +1,188 @@
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package org.alfresco.web.ui.repo.renderer;
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import java.io.IOException;
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import java.util.List;
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import javax.faces.component.UIComponent;
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import javax.faces.context.FacesContext;
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import javax.faces.context.ResponseWriter;
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import org.alfresco.web.ui.common.Utils;
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import org.alfresco.web.ui.common.renderer.BaseRenderer;
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import org.alfresco.web.ui.repo.component.UITree;
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import org.alfresco.web.ui.repo.component.UITree.TreeNode;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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* Renderer for the UITree component that outputs the necessary
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* JavaScript to use the Yahoo UI toolkit tree control.
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*
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* @author gavinc
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*/
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public class YahooTreeRenderer extends BaseRenderer
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{
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protected int nodeCounter;
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protected final static String TREE_SCRIPTS_WRITTEN = "_alfTreeScripts";
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private static final Log logger = LogFactory.getLog(YahooTreeRenderer.class);
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@SuppressWarnings("unchecked")
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@Override
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public void encodeBegin(FacesContext context, UIComponent component) throws IOException
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{
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// get the root nodes
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UITree tree = (UITree)component;
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List<TreeNode> rootNodes = tree.getRootNodes();
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if (rootNodes != null && rootNodes.size() > 0)
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{
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ResponseWriter out = context.getResponseWriter();
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String treeContainerId = component.getClientId(context) + "Container";
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// output the scripts required by the component (checks are
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// made to make sure the scripts are only written once)
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Utils.writeYahooScripts(context, out, null);
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// write out the JavaScript specific to the Tree component,
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// again, make sure it's only done once
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Object present = context.getExternalContext().getRequestMap().
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get(TREE_SCRIPTS_WRITTEN);
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if (present == null)
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{
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out.write("<link rel=\"stylesheet\" href=\"");
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out.write(context.getExternalContext().getRequestContextPath());
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out.write("/css/yahoo-tree.css\" type=\"text/css\" />");
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out.write("<script type=\"text/javascript\" src=\"");
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out.write(context.getExternalContext().getRequestContextPath());
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out.write("/scripts/ajax/yahoo/treeview/treeview-min.js\"> </script>\n");
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out.write("<script type=\"text/javascript\" src=\"");
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out.write(context.getExternalContext().getRequestContextPath());
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out.write("/scripts/ajax/yahoo-tree.js\"> </script>\n");
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context.getExternalContext().getRequestMap().put(
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TREE_SCRIPTS_WRITTEN, Boolean.TRUE);
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}
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// output the div container for the tree
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out.write("<div id=\"");
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out.write(treeContainerId);
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out.write("\"></div>\n");
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// generate the startup
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out.write("<script type=\"text/javascript\">\n");
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out.write("var tree;\n");
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if (tree.getRetrieveChildrenUrl() != null)
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{
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out.write("setLoadDataUrl('");
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out.write(tree.getRetrieveChildrenUrl());
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out.write("');\n");
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}
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if (tree.getNodeCollapsedUrl() != null)
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{
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out.write("setCollapseUrl('");
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out.write(tree.getNodeCollapsedUrl());
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out.write("');\n");
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}
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if (tree.getNodeSelectedCallback() != null)
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{
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out.write("setNodeSelectedHandler('");
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out.write(tree.getNodeSelectedCallback());
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out.write("');\n");
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}
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out.write("function initTree() {\n");
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out.write(" tree = new YAHOO.widget.TreeView(\"");
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out.write(treeContainerId);
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out.write("\");\n");
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out.write(" var root = tree.getRoot();\n");
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if (tree.getNodeExpandedCallback() != null)
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{
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out.write(" tree.subscribe('expand', ");
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out.write(tree.getNodeExpandedCallback());
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out.write(");\n");
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}
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if (tree.getNodeCollapsedCallback() != null)
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{
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out.write(" tree.subscribe('collapse', ");
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out.write(tree.getNodeCollapsedCallback());
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out.write(");\n");
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}
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// generate script for each root node
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this.nodeCounter = 0;
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for (TreeNode node : rootNodes)
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{
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generateNode(node, out, null);
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}
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out.write(" tree.draw();\n");
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out.write(" tree.setDynamicLoad(loadDataForNode);\n}\n");
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out.write("YAHOO.util.Event.on(window, \"load\", window.initTree);");
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out.write("</script>\n");
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}
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else if (logger.isDebugEnabled())
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{
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logger.debug("There weren't any nodes to render");
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}
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}
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/**
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* Generates the JavaScript required to create the branch of a tree from
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* the given node.
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*
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* @param node The node to generate
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* @param out Response writer
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* @param parentVarName Name of the parent variable, null if the node has no parent
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*/
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protected void generateNode(TreeNode node, ResponseWriter out, String parentVarName)
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throws IOException
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{
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String currentVarName = getNextVarName();
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// generate the Javascript to create the given node using the
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// appropriate parent variable
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out.write(" var ");
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out.write(currentVarName);
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out.write(" = createYahooTreeNode(");
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if (node.getParent() == null)
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{
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out.write("root");
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}
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else
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{
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out.write(parentVarName);
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}
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out.write(", \"");
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out.write(node.getNodeRef());
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out.write("\", \"");
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out.write(node.getName());
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out.write("\", \"");
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out.write(node.getIcon());
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out.write("\", ");
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out.write(Boolean.toString(node.isExpanded()));
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out.write(", ");
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out.write(Boolean.toString(node.isSelected()));
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out.write(");\n");
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// iterate through the child nodes and generate them
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if (node.isExpanded() && node.getChildren().size() > 0)
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{
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for (TreeNode child : node.getChildren())
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{
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generateNode(child, out, currentVarName);
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}
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}
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}
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protected String getNextVarName()
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{
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this.nodeCounter++;
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return "n" + Integer.toString(this.nodeCounter);
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}
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}
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