1 files changed, 119 insertions, 0 deletions
diff --git a/org.openembedded.bc.ui/src/org/openembedded/bc/ui/editors/bitbake/BBVariableTextHover.java b/org.openembedded.bc.ui/src/org/openembedded/bc/ui/editors/bitbake/BBVariableTextHover.java
new file mode 100644
index 0000000..d98c305
--- /dev/null
+++ b/org.openembedded.bc.ui/src/org/openembedded/bc/ui/editors/bitbake/BBVariableTextHover.java
@@ -0,0 +1,119 @@
+/**
+ * 
+ */
+package org.openembedded.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.openembedded.bc.bitbake.BBRecipe;
+import org.openembedded.bc.bitbake.BBSession;
+import org.openembedded.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) {
+			e.printStackTrace();
+			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 = new BBRecipe(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;
+		}
+	}
+}
+\ No newline at end of file