Author: yradtsevich Date: 2010-06-02 12:02:31 -0400 (Wed, 02 Jun 2010) New Revision: 22483 Modified: trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XPCOM.java trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XulRunnerVpeUtils.java Log: https://jira.jboss.org/browse/JBIDE-6229 Implement DnD support for selected text in VPE - A method to get bounds of the selected text has been created: XulRunnerVpeUtils.getTextSelectionBounds . Modified: trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XPCOM.java =================================================================== --- trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XPCOM.java 2010-06-02 14:58:31 UTC (rev 22482) +++ trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XPCOM.java 2010-06-02 16:02:31 UTC (rev 22483) @@ -36,6 +36,7 @@ public static final String NS_PREFSERVICE_CONTRACTID = "(a)mozilla.org/preferences-service;1"; //$NON-NLS-1$ public static final String NS_SUPPORTSSTRING_CONTRACTID = "(a)mozilla.org/supports-string;1"; //$NON-NLS-1$ public static final String NS_SUPPORTSARRAY_CONTRACTID = "(a)mozilla.org/supports-array;1"; //$NON-NLS-1$ + public static final String NS_ACCESSIBILITYSERVICE_CONTRACTID = "(a)mozilla.org/accessibilityService;1"; //$NON-NLS-1$ public static final String IN_FLASHER_CONTRACTID = "(a)mozilla.org/inspector/flasher;1"; //$NON-NLS-1$ /** Modified: trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XulRunnerVpeUtils.java =================================================================== --- trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XulRunnerVpeUtils.java 2010-06-02 14:58:31 UTC (rev 22482) +++ trunk/vpe/plugins/org.jboss.tools.vpe.xulrunner/src/org/jboss/tools/vpe/xulrunner/util/XulRunnerVpeUtils.java 2010-06-02 16:02:31 UTC (rev 22483) @@ -15,6 +15,11 @@ import org.eclipse.swt.graphics.Rectangle; import org.jboss.tools.vpe.xulrunner.BrowserPlugin; +import org.mozilla.interfaces.nsIAccessNode; +import org.mozilla.interfaces.nsIAccessible; +import org.mozilla.interfaces.nsIAccessibleCoordinateType; +import org.mozilla.interfaces.nsIAccessibleRetrieval; +import org.mozilla.interfaces.nsIAccessibleText; import org.mozilla.interfaces.nsIBoxObject; import org.mozilla.interfaces.nsIDOMDocument; import org.mozilla.interfaces.nsIDOMElement; @@ -22,6 +27,8 @@ import org.mozilla.interfaces.nsIDOMNSElement; import org.mozilla.interfaces.nsIDOMNSHTMLElement; import org.mozilla.interfaces.nsIDOMNode; +import org.mozilla.interfaces.nsIDOMText; +import org.mozilla.xpcom.Mozilla; import org.mozilla.xpcom.XPCOMException; /** @@ -106,4 +113,69 @@ return new Rectangle(0, 0, 0, 0); } } + + /** + * Returns the bounds of the selected text in given + * {@code selectionContainer}. + */ + public static Rectangle getTextSelectionBounds(nsIDOMText slectionContainer) { + nsIAccessibleText accessibleTextAncestor = getAccessibleTextAncestor(slectionContainer); + if (accessibleTextAncestor == null) { + // cannot get selection bounds + return null; + } + if (accessibleTextAncestor.getSelectionCount() == 0) { + // no text selected + return null; + } + + int[] startOffset = new int[1]; + int[] endOffset = new int[1]; + accessibleTextAncestor.getSelectionBounds(0, startOffset, endOffset); + + int[] x = new int[1]; + int[] y = new int[1]; + int[] width = new int[1]; + int[] height = new int[1]; + accessibleTextAncestor.getRangeExtents(startOffset[0], endOffset[0], + x, y, width, height, nsIAccessibleCoordinateType.COORDTYPE_PARENT_RELATIVE); + + Rectangle ancestorBounds = getElementBounds( + queryInterface(accessibleTextAncestor, nsIAccessNode.class) + .getDOMNode()); + + return new Rectangle(ancestorBounds.x + x[0], ancestorBounds.y + y[0], + width[0], height[0]); + } + + /** + * Returns the nearest ancestor of given {@code node} which supports + * {@link nsIAccessibleText}. + */ + private static nsIAccessibleText getAccessibleTextAncestor(nsIDOMNode node) { + nsIAccessibleText accessibleTextAncestor = null; + nsIDOMNode ancestor = node; + while (accessibleTextAncestor == null && ancestor != null) { + ancestor = ancestor.getParentNode(); + try { + nsIAccessible accessibleAncestor = getAccessible(ancestor); + accessibleTextAncestor = queryInterface(accessibleAncestor, nsIAccessibleText.class); + } catch (XPCOMException e) { + // it's OK, accessibleTextAncestor still = null + } + } + + return accessibleTextAncestor; + } + + /** + * Returns {@link nsIAccessible} interface for given {@code node}. + */ + private static nsIAccessible getAccessible(nsIDOMNode node) { + return ((nsIAccessibleRetrieval) + Mozilla.getInstance().getServiceManager().getServiceByContractID( + XPCOM.NS_ACCESSIBILITYSERVICE_CONTRACTID, + nsIAccessibleRetrieval.NS_IACCESSIBLERETRIEVAL_IID)) + .getAccessibleFor(node); + } }