Subwindow clipping

This patch implements subwindow clipping as per Stephen Turnbull's suggestion. I'm hoping this will nuke the endless tab redisplay problems so am recommiting the tabs sync. Let me know if this does not fix the problems. I will apply this to cvs. andy 1999-09-13 Andy Piper <andy(a)xemacs.org&gt; * xlwtabs.c: Put in tabs sync because clipping should fix useability problems. 1999-09-16 Andy Piper <andy(a)xemacs.org&gt; * redisplay-output.c (redisplay_output_subwindow): clip subwindows that don't completely fit on-screen rather than just unmapping them. * glyphs.h: change signature of map_subwindow. * glyphs.c (map_subwindow): add display_glyph_area to the signature. make sure the mapped area saved in the subwindow_cachel reflects this. (Fforce_subwindow_map): make a no-op. I don't think this does anything useful. * glyphs-x.h (struct x_subwindow_data): save the Display rather than the Screen. Add a clipwindow and clipwidget handle. (IMAGE_INSTANCE_X_CLIPWINDOW): new accessor. (IMAGE_INSTANCE_X_CLIPWIDGET): ditto. (XIMAGE_INSTANCE_X_CLIPWIDGET): ditto. (XIMAGE_INSTANCE_X_CLIPWINDOW): ditto. * glyphs-x.c (x_finalize_image_instance): destroy the clipwidget as well as the widget itself. (x_unmap_subwindow): unmap the clipwindow and clipwidget rather than the widgets and subwindows themselves. move the widget inside the clipwidget. (x_subwindow_instantiate): hold onto the Display rather than the Screen. allocate a clipwindow to put the subwindow inside. (x_resize_subwindow): use saved Display directly. (x_widget_instantiate): allocate a clipwidget of type EmacsManager to put widgets inside. * glyphs-widget.c: remove group stuff. * glyphs-msw.h (struct mswindows_subwindow_data): new structure to hold the clipwindow. (IMAGE_INSTANCE_MSWINDOWS_CLIPWINDOW): new accessor. (XIMAGE_INSTANCE_MSWINDOWS_CLIPWINDOW): ditto. * glyphs-msw.c: remove group stuff. (mswindows_finalize_image_instance): destroy clipwindow as well as the widget itself. (mswindows_unmap_subwindow): unmap the clipwindow rather than the widget. (mswindows_map_subwindow): ditto. move the widget within the clipwindow. (mswindows_subwindow_instantiate): allocate and initialize mswindows_subwindow_data. allocate a clipwindow with the subwindow as a child. (mswindows_widget_instantiate): ditto. (mswindows_control_wnd_proc): new function that allows us to propagate events from the widget to the main windows control loop. * device-msw.c (mswindows_init_device): register new widget clip window class. * console.h (struct console_methods): add display_glyph_area to map_window. * console-msw.h: declare new window class and wnd proc for widgets. -------------------------------------------------------------- Dr Andy Piper Senior Consultant Architect, BEA Systems Ltd