Initial revision

git-svn-id: file:///fltk/svn/fltk/trunk@2 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 127 insertions, 0 deletions

diff --git a/src/Fl_cutpaste.cxx b/src/Fl_cutpaste.cxx
new file mode 100644
index 000000000..e7fcdd5e5
--- /dev/null
+++ b/src/Fl_cutpaste.cxx
@@ -0,0 +1,127 @@
+// Fl_cutpaste.C
+
+// Implementation of cut and paste.
+
+// This is seperated from Fl.C mostly to test Fl::add_handler().
+// But this will save a small amount of code size in a program that
+// has no text editing fields or other things that call cut or paste.
+
+#ifdef WIN32
+#include "Fl_cutpaste_win32.C"
+#else
+
+#include <FL/Fl.H>
+#include <FL/x.H>
+#include <FL/Fl_Window.H>
+#include <string.h>
+
+static char *selection_buffer;
+static int selection_length;
+static int selection_buffer_length;
+static char beenhere;
+
+extern Fl_Widget *fl_selection_requestor; // widget doing request_paste()
+
+static int selection_xevent_handler(int) {
+
+  switch (fl_xevent->type) {
+
+  case SelectionNotify: {
+    if (!fl_selection_requestor) return 0;
+    static char *pastebuffer;
+    if (pastebuffer) {XFree(pastebuffer); pastebuffer = 0;}
+    if (fl_xevent->xselection.property != 0) {
+      Atom a; int f; unsigned long n,b;
+      if (!XGetWindowProperty(fl_display,
+			      fl_xevent->xselection.requestor,
+			      fl_xevent->xselection.property,
+			      0,100000,1,0,&a,&f,&n,&b,
+			      (unsigned char**)&pastebuffer)) {
+	Fl::e_text = pastebuffer;
+	Fl::e_length = int(n);
+	fl_selection_requestor->handle(FL_PASTE);
+      }
+    }}
+    return 1;
+
+  case SelectionClear:
+    Fl::selection_owner(0);
+    return 1;
+
+  case SelectionRequest: {
+    XSelectionEvent e;
+    e.type = SelectionNotify;
+    e.display = fl_display;
+    e.requestor = fl_xevent->xselectionrequest.requestor;
+    e.selection = fl_xevent->xselectionrequest.selection;
+    e.target = fl_xevent->xselectionrequest.target;
+    e.time = fl_xevent->xselectionrequest.time;
+    if (fl_xevent->xselectionrequest.target != XA_STRING || !selection_length) {
+      e.property = 0;
+    } else {
+      e.property = fl_xevent->xselectionrequest.property;
+    }
+    if (e.property) {
+      XChangeProperty(fl_display, e.requestor, e.property,
+		      XA_STRING, 8, 0, (unsigned char *)selection_buffer,
+		      selection_length);
+    }
+    XSendEvent(fl_display, e.requestor, 0, 0, (XEvent *)&e);}
+    return 1;
+
+  default:
+    return 0;
+  }
+}
+
+////////////////////////////////////////////////////////////////
+
+// Call this when a "paste" operation happens:
+void Fl::paste(Fl_Widget &receiver) {
+  if (selection_owner()) {
+    // We already have it, do it quickly without window server.
+    // Notice that the text is clobbered if set_selection is
+    // called in response to FL_PASTE!
+    Fl::e_text = selection_buffer;
+    Fl::e_length = selection_length;
+    receiver.handle(FL_PASTE);
+    return;
+  }
+  // otherwise get the window server to return it:
+  fl_selection_requestor = &receiver;
+  XConvertSelection(fl_display, XA_PRIMARY, XA_STRING, XA_PRIMARY,
+		    fl_xid(Fl::first_window()), fl_event_time);
+  if (!beenhere) {
+    Fl::add_handler(selection_xevent_handler);
+    beenhere = 1;
+  }
+}
+
+////////////////////////////////////////////////////////////////
+
+// call this when you create a selection:
+void Fl::selection(Fl_Widget &owner, const char *stuff, int len) {
+  if (!stuff || len<=0) return;
+  if (len+1 > selection_buffer_length) {
+    delete[] selection_buffer;
+    selection_buffer = new char[len+100];
+    selection_buffer_length = len+100;
+  }
+  memcpy(selection_buffer, stuff, len);
+  selection_buffer[len] = 0; // needed for direct paste
+  selection_length = len;
+  selection_owner(&owner);
+  static Window selxid; // window X thinks selection belongs to
+  if (!selxid) selxid =
+		 XCreateSimpleWindow(fl_display, 
+				     RootWindow(fl_display, fl_screen),
+				     0,0,1,1,0,0,0);
+  XSetSelectionOwner(fl_display, XA_PRIMARY, selxid, fl_event_time);
+  if (!beenhere) {
+    Fl::add_handler(selection_xevent_handler);
+    beenhere = 1;
+  }
+}
+
+#endif
+// end of Fl_cutpaste.C