1 files changed, 118 insertions, 0 deletions

diff --git a/plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/BBVariableTextHover.java b/plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/BBVariableTextHover.java
new file mode 100644
index 0000000..9478423
--- /dev/null
+++ b/plugins/org.yocto.bc.ui/src/org/yocto/bc/ui/editors/bitbake/BBVariableTextHover.java
@@ -0,0 +1,118 @@
+/**
+ * 
+ */
+package org.yocto.bc.ui.editors.bitbake;
+
+import java.io.File;
+import java.util.Map;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.jobs.Job;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextHover;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.Region;
+
+import org.yocto.bc.bitbake.BBRecipe;
+import org.yocto.bc.bitbake.BBSession;
+import org.yocto.bc.ui.Activator;
+
+/**
+ * Maps BB Variables in the editor to BBSession
+ * @author kgilmer
+ *
+ */
+class BBVariableTextHover implements ITextHover {
+        private final BBSession session;
+        private volatile Map envMap;
+
+        public BBVariableTextHover(BBSession session, String file) {
+                this.session = session;
+                envMap = session;
+                LoadRecipeJob loadRecipeJob = new LoadRecipeJob(getFilename(file), file);
+                loadRecipeJob.schedule();
+        }
+
+        private String getFilename(String file) {
+                
+                String [] elems = file.split(File.separator);
+                
+                return elems[elems.length - 1];
+        }
+
+        public IRegion getHoverRegion(ITextViewer tv, int off) {
+                return new Region(off, 0);
+        }
+
+        public String getHoverInfo(ITextViewer tv, IRegion r) {
+                try {
+                        IRegion lineRegion = tv.getDocument().getLineInformationOfOffset(r.getOffset());
+
+                        return getBBVariable(tv.getDocument().get(lineRegion.getOffset(), lineRegion.getLength()).toCharArray(), r.getOffset() - lineRegion.getOffset());
+                } catch (Exception e) {
+                        return "";
+                }
+        }
+
+        private String getBBVariable(char[] line, int offset) {
+                // Find start of word.
+                int i = offset;
+                
+                while (line[i] != ' ' && line[i] != '$' && i > 0) {
+                        i--;
+                }
+                
+                if (i < 0 || line[i] != '$') {
+                        return "";  //this is not a BB variable.
+                }
+                
+                // find end of word
+                int start = i;
+                i = offset;
+                
+                while (line[i] != ' ' && line[i] != '}' && i <= line.length) {
+                        i++;
+                }
+                
+                if (line[i] != '}') {
+                        return "";  //this bb variable didn't terminate as expected
+                }
+                
+                String key = new String(line, start + 2, i - start - 2);
+                String val = (String) envMap.get(key);
+                
+                if (val == null) {
+                        val = "";
+                }
+                
+                if (val.length() > 64) {
+                        val = val.substring(0, 64) + '\n' + val.substring(65);
+                }
+                
+                return val;
+        }
+        
+        private class LoadRecipeJob extends Job {
+                private final String filePath;
+
+                public LoadRecipeJob(String name, String filePath) {
+                        super("Extracting BitBake environment for " + name);
+                        this.filePath = filePath;
+                }
+
+                @Override
+                protected IStatus run(IProgressMonitor mon) {
+                        try {
+                                BBRecipe recipe = Activator.getBBRecipe(session, filePath);
+                                recipe.initialize();
+                                envMap = recipe;
+                        } catch (Exception e) {
+                                return new Status(IStatus.WARNING, Activator.PLUGIN_ID, "Unable to load session for " + filePath, e);
+                        } 
+                        
+                        return Status.OK_STATUS;
+                }
+        }
+}
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