Initial revision

hw/darwin/quartz/quartzPasteboard.c

@@ -0,0 +1,150 @@
+/**************************************************************
+ * quartzPasteboard.c
+ *
+ * Aqua pasteboard <-> X cut buffer
+ * Greg Parker     gparker@cs.stanford.edu     March 8, 2001
+ **************************************************************/
+/*
+ * Copyright (c) 2001 Greg Parker. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name(s) of the above copyright
+ * holders shall not be used in advertising or otherwise to promote the sale,
+ * use or other dealings in this Software without prior written authorization.
+ */
+/* $XFree86: xc/programs/Xserver/hw/darwin/quartz/quartzPasteboard.c,v 1.1 2002/03/28 02:21:19 torrey Exp $ */
+
+#include "quartzPasteboard.h"
+
+#include "Xatom.h"
+#include "windowstr.h"
+#include "propertyst.h"
+#include "scrnintstr.h"
+#include "selection.h"
+#include "globals.h"
+
+extern Selection *CurrentSelections;
+extern int NumCurrentSelections;
+
+
+// Helper function to read the X11 cut buffer
+// FIXME: What about multiple screens? Currently, this reads the first
+// CUT_BUFFER0 from the first screen where the buffer content is a string.
+// Returns a string on the heap that the caller must free.
+// Returns NULL if there is no cut text or there is not enough memory.
+static char * QuartzReadCutBuffer(void)
+{
+    int i;
+    char *text = NULL;
+
+    for (i = 0; i < screenInfo.numScreens; i++) {
+        ScreenPtr pScreen = screenInfo.screens[i];
+        PropertyPtr pProp;
+
+        pProp = wUserProps (WindowTable[pScreen->myNum]);
+        while (pProp && pProp->propertyName != XA_CUT_BUFFER0) {
+	    pProp = pProp->next;
+        }
+        if (! pProp) continue;
+        if (pProp->type != XA_STRING) continue;
+        if (pProp->format != 8) continue;
+
+        text = xalloc(1 + pProp->size);
+        if (! text) continue;
+        memcpy(text, pProp->data, pProp->size);
+        text[pProp->size] = '\0';
+        return text;
+    }
+
+    // didn't find any text
+    return NULL;
+}
+
+// Write X cut buffer to Mac OS X pasteboard
+// Called by ProcessInputEvents() in response to request from X server thread.
+void QuartzWritePasteboard(void)
+{
+    char *text;
+    text = QuartzReadCutBuffer();
+    if (text) {
+        QuartzWriteCocoaPasteboard(text);
+        free(text);
+    }
+}
+
+#define strequal(a, b) (0 == strcmp((a), (b)))
+
+// Read Mac OS X pasteboard into X cut buffer
+// Called by ProcessInputEvents() in response to request from X server thread.
+void QuartzReadPasteboard(void)
+{
+    char *oldText = QuartzReadCutBuffer();
+    char *text = QuartzReadCocoaPasteboard();
+
+    // Compare text with current cut buffer contents.
+    // Change the buffer if both exist and are different
+    //   OR if there is new text but no old text.
+    // Otherwise, don't clear the selection unnecessarily.
+
+    if ((text && oldText && !strequal(text, oldText)) ||
+        (text && !oldText)) {
+        int scrn, sel;
+
+        for (scrn = 0; scrn < screenInfo.numScreens; scrn++) {
+	    ScreenPtr pScreen = screenInfo.screens[scrn];
+	    // Set the cut buffers on each screen
+	    // fixme really on each screen?
+	    ChangeWindowProperty(WindowTable[pScreen->myNum], XA_CUT_BUFFER0,
+				 XA_STRING, 8, PropModeReplace,
+				 strlen(text), (pointer)text, TRUE);
+        }
+
+        // Undo any current X selection (similar to code in dispatch.c)
+        // FIXME: what about secondary selection?
+        // FIXME: only touch first XA_PRIMARY selection?
+        sel = 0;
+        while ((sel < NumCurrentSelections)  &&
+	       CurrentSelections[sel].selection != XA_PRIMARY)
+	    sel++;
+        if (sel < NumCurrentSelections) {
+	    // Notify client if necessary
+	    if (CurrentSelections[sel].client) {
+	        xEvent event;
+
+	        event.u.u.type = SelectionClear;
+		event.u.selectionClear.time = GetTimeInMillis();
+		event.u.selectionClear.window = CurrentSelections[sel].window;
+		event.u.selectionClear.atom = CurrentSelections[sel].selection;
+		TryClientEvents(CurrentSelections[sel].client, &event, 1,
+				NoEventMask, NoEventMask /*CantBeFiltered*/,
+				NullGrab);
+	    }
+
+	    // Erase it
+	    // FIXME: need to erase .selection too? dispatch.c doesn't
+	    CurrentSelections[sel].pWin = NullWindow;
+	    CurrentSelections[sel].window = None;
+	    CurrentSelections[sel].client = NullClient;
+        }
+    }
+
+    if (text) free(text);
+    if (oldText) free(oldText);
+}