Bug 36519 [call hierarchy] ability to copy the view's content to the clipboard
we should add the ability to copy the view's content to the clipboard (it may be useful for people to take a pic of the callgraph and show to other people, for example)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPart.java
this.fShownMethod = method;
        refresh();
    }
    public IMethod getMethod() {
        return fShownMethod;
    }
    /**
     * called from ToggleOrientationAction.
     * @param orientation VIEW_ORIENTATION_HORIZONTAL or VIEW_ORIENTATION_VERTICAL
     */
    void setOrientation(int orientation) {
        if (fCurrentOrientation != orientation) {
            if ((fLocationViewer != null) && !fLocationViewer.getControl().isDisposed() &&
                        (fHierarchyLocationSplitter != null) &&
                        !fHierarchyLocationSplitter.isDisposed()) {
                if (orientation == VIEW_ORIENTATION_SINGLE) {
                    setShowCallDetails(false);
                } else {
                    if (fCurrentOrientation == VIEW_ORIENTATION_SINGLE) {
                        setShowCallDetails(true);
                    }
                    boolean horizontal = orientation == VIEW_ORIENTATION_HORIZONTAL;
                    fHierarchyLocationSplitter.setOrientation(horizontal ? SWT.HORIZONTAL
                                                                         : SWT.VERTICAL);
                }
                fHierarchyLocationSplitter.layout();
            }
            for (int i = 0; i < fToggleOrientationActions.length; i++) {
                fToggleOrientationActions[i].setChecked(orientation == fToggleOrientationActions[i].getOrientation());
            }