package org.symbian.tools.tmw.debug.internal;

import org.chromium.debug.core.model.ChromiumLineBreakpoint;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITypedRegion;
import org.eclipse.ui.IEditorInput;
import org.eclipse.wst.html.core.text.IHTMLPartitions;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.eclipse.wst.sse.ui.internal.provisional.extensions.ISourceEditingTextTools;
import org.eclipse.wst.sse.ui.internal.provisional.extensions.breakpoint.IBreakpointProvider;
import org.symbian.tools.tmw.debug.internal.launch.WRTProjectWorkspaceBridge;

@SuppressWarnings("restriction")
public class HtmlBreakpointProvider implements IBreakpointProvider {

	public IStatus addBreakpoint(IDocument document, IEditorInput input,
			int lineNumber, int offset) throws CoreException {
		boolean hasScript = hasJavaScript(document, lineNumber);

		if (hasScript) {
            ChromiumLineBreakpoint breakpoint = new ChromiumLineBreakpoint(getResource(input), lineNumber,
                    WRTProjectWorkspaceBridge.DEBUG_MODEL_ID);
			DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(breakpoint);
		}
		return Status.OK_STATUS;
	}

	private boolean hasJavaScript(IDocument document, int lineNumber) {
		try {
			if (document instanceof IStructuredDocument) {
				IStructuredDocument doc = (IStructuredDocument) document;
				int lineOffset = doc.getLineOffset(lineNumber - 1);
				int lineLength = doc.getLineLength(lineNumber - 1);
				ITypedRegion[] computePartitioning = doc.computePartitioning(
						lineOffset, lineLength);
				for (ITypedRegion region : computePartitioning) {
					if (IHTMLPartitions.SCRIPT.equals(region.getType())
							|| IHTMLPartitions.SCRIPT_EVENTHANDLER
									.equals(region.getType())) {
						return true;
					}
				}
			}
		} catch (BadLocationException e) {
			Activator.log(e);
		}
		return false;
	}

	public IResource getResource(IEditorInput input) {
		return (IResource) input.getAdapter(IResource.class);
	}

	public void setSourceEditingTextTools(ISourceEditingTextTools tools) {
		// Do nothing
	}

}