Update Nyquist to v3.09.

lib-src/libnyquist/nyquist/sys/mac/macdrag.c

@@ -0,0 +1,161 @@
+#include <Drag.h>
+#include <Errors.h>
+#include <TextEdit.h>
+#include <QuickDraw.h>
+
+extern TEHandle hTERec;
+// Handle drag from newswatcher -EAD
+
+/*----------------------------------------------------------------------------
+    DragText
+    
+    Drag selected text.
+    
+    Entry:	ev = pointer to mouse down event record.
+            where = location of mouse down event in local coords.
+            theTE = handle to TextEdit record.
+    
+    Exit:	function result = error code.
+            *dragged = 
+                true if text was dragged.
+                false if mouse down was not over text selection, or
+                    user did not move the mouse before releasing the
+                    mouse button.
+            *trashed = true if text was dragged to trash.
+----------------------------------------------------------------------------*/
+extern RgnHandle rgn;
+//extern EventRecord theEvent;
+
+Boolean DragText (EventRecord *ev)
+{
+    DragReference dragRef;
+    OSErr err = noErr;
+    Boolean haveDragRef = false;
+    Handle hText;
+    RgnHandle dragRgn, tempRgn;
+    short selStart, selEnd;
+    char state;
+    Point theLoc;
+    GrafPtr curPort;
+    
+//	if (!PtInTEHiliteRgn(where, hTERec)) return noErr;
+    if (!WaitMouseMoved(ev->where)) return noErr;
+    
+    GetPort(&curPort);
+    
+    CopyRgn(rgn, dragRgn = NewRgn());
+    SetPt(&theLoc, 0, 0);
+    LocalToGlobal(&theLoc);
+    OffsetRgn(dragRgn, theLoc.h, theLoc.v);
+
+    hText = (**hTERec).hText;
+    selStart = (**hTERec).selStart;
+    selEnd = (**hTERec).selEnd;
+    
+    err = NewDrag(&dragRef);
+    if (err != noErr) goto exit;
+    haveDragRef = true;
+    state = HGetState(hText);
+    HLock(hText);
+    err = AddDragItemFlavor(dragRef, 1, 'TEXT', *hText + selStart, selEnd - selStart, 0);
+    HSetState(hText, state);
+    if (err != noErr) goto exit;
+//	dragRgn = NewRgn();
+//	err = TEGetHiliteRgn(dragRgn, hTERec);
+//	if (err != noErr) goto exit;
+//	LocalToGlobalRgn(dragRgn);
+//	OutlineRegion(dragRgn);
+    SetDragItemBounds(dragRef, 1, &(**dragRgn).rgnBBox);
+    tempRgn = NewRgn();
+    CopyRgn(dragRgn, tempRgn);
+    InsetRgn(tempRgn, 1, 1);
+    DiffRgn(dragRgn, tempRgn, dragRgn);
+    DisposeRgn(tempRgn);
+
+    err = TrackDrag(dragRef, ev, dragRgn);
+    if (err != noErr && err != userCanceledErr) goto exit;
+    //*trashed = DragTargetWasTrash(dragRef);
+//	DisposeRgn(dragRgn);
+
+    DisposeDrag(dragRef);
+    return true;
+    
+exit:
+
+    if (haveDragRef) DisposeDrag(dragRef);
+//	if (dragRgn != nil) DisposeRgn(dragRgn);
+    return false;
+}
+
+
+
+/*----------------------------------------------------------------------------
+    LocalToGlobalRgn 
+    
+    Convert a region from local to global coordinates.
+            
+    Entry:	rgn = handle to region.
+----------------------------------------------------------------------------*/
+
+void LocalToGlobalRgn (RgnHandle rgn)
+{
+    Point where;
+    
+    SetPt(&where, 0, 0);
+    LocalToGlobal(&where);
+    OffsetRgn(rgn, where.h, where.v);
+}
+
+/*----------------------------------------------------------------------------
+    OutlineRegion 
+    
+    Change a region into a tracing of its border which is appropriate 
+    for normal dragging.
+            
+    Entry:	theRgn = handle to region.
+    
+    Exit:	Region changed to outline of region.
+    
+    From Apple "HFS Drag Sample" sample code.
+----------------------------------------------------------------------------*/
+
+void OutlineRegion (RgnHandle theRgn)
+{
+    RgnHandle tempRgn;
+    
+    tempRgn = NewRgn();
+    CopyRgn(theRgn, tempRgn);
+    InsetRgn(tempRgn, 1, 1);
+    DiffRgn(theRgn, tempRgn, theRgn);
+    DisposeRgn(tempRgn);
+}
+
+/*----------------------------------------------------------------------------
+    PtInTEHiliteRgn 
+    
+    Determine whether or not a point is in the current TextEdit hilite
+    region.
+            
+    Entry:	where = point in local coords.
+            theTE = handle to TextEdit record.
+            
+    Exit:	function result = true if point is in the hilite region.
+----------------------------------------------------------------------------*/
+
+Boolean PtInTEHiliteRgn (Point where, TEHandle theTE)
+{
+    Boolean result = false;
+    RgnHandle rgn = nil;
+    OSErr err = noErr;
+    
+    //if (!HaveTEGetHiliteRgn()) return false;
+    rgn = NewRgn();
+    err = TEGetHiliteRgn(rgn, theTE);
+    if (err != noErr) goto exit;
+    result = PtInRgn(where, rgn);
+    
+exit:
+
+    if (rgn != nil) DisposeRgn(rgn);
+    return result;
+}