REAL_END. Notice if cursor gets overwritten.
(notice_overwritten_cursor): Take X positions as parameters.
(x_draw_phys_cursor_glyph): Save state of w->phys_cursor_on_p
around call to x_draw_glyphs.
(w32_mouse_position): Use it.
(note_mouse_movement): If the mouse moved off the glyph, remember its
new position.
Sync with xterm.c:
(notice_overwritten_cursor): Renamed from note_overwritten_text_cursor.
Rewritten to take glyph widths into account.
(x_y_to_hpos_vpos): Add parameter BUFFER_ONLY_P.
(fast_find_string_pos): New function.
(fast_find_position): Return the correct vpos. Add parameter STOP.
In the final row, stop before glyphs having STOP as object.
Don't consider glyphs that are not from a buffer.
(fast_find_position) [0]: Add a presumably more correct version for after 21.1.
(expose_window_tree, expose_frame): Don't compute intersections here.
(expose_window): Do it here instead.
(expose_window_tree, expose_window, expose_line): Return 1 when
overwriting mouse-face.
(expose_window): If W is the window currently being updated, mark
the frame garbaged.
(expose_frame): If mouse-face was overwritten, redo it.
(x_use_underline_position_properties): New variable.
(syms_of_xterm): DEFVAR_BOOL it.
(x_draw_glyph_string): Add comment to use it in future.
(x_draw_glyph_string): Restore clipping after drawing box.
Fix a computation of the underline position.
(w32_get_glyph_string_clip_rect): Minor cleanup.
(x_fill_stretch_glyph_string): Remove an assertion.
(x_produce_glyphs): Don't convert multibyte characters
to unibyte characters in unibyte buffers.
(cursor_in_mouse_face_p): New function.
(x_draw_stretch_glyph_string): Use it to choose a different GC
when drawing a cursor within highlighted text. Don't draw
background again if it has already been drawn.
(x_draw_glyph_string_box): Don't draw a full-width
box just because the glyph row's full_width_p flag is set.
(x_draw_glyphs): Fix computation of rightmost x for full-width rows.
(x_dump_glyph_string): Put in #if GLYPH_DEBUG.
(w32_draw_relief_rect): Extend left shadow to the bottom and left;
change bottom shadow accordingly. Some cleanup.
(x_update_window_end): Handle overwritten mouse face
also for tool bar windows.
(show_mouse_face): Set the glyph row's mouse_face_p flag also when
DRAW is DRAW_IMAGE_RAISED.
(clear_mouse_face): Return 1 if text with mouse face was
actually redrawn. Make the function static. Reset
dpyinfo->mouse_face_overlay otherwise note_mouse_highlight might
optimize away highlighting if we pass over that same overlay again.
(note_mouse_highlight): Call mouse_face_overlay_overlaps
to detect a case where we have to highlight a different region
despite not having left the currently highlighted region.
Set mouse_face_overlay in the x_display_info. Avoid changing the
mouse pointer shape when show_mouse_face has already done it, or
there is no need. Handle mouse-face and help-echo in strings.
(glyph_rect): New function.
(w32_mouse_position): Use it to raise the threshold for mouse
movement event generation.
(w32_initialize_display_info): Initialize the x_display_info's
mouse_face_overlay.
(w32_set_vertical_scroll_bar): Don't clear a zero height or width area.
(w32_set_vertical_scroll_bar, x_scroll_bar_create): Don't configure
a widget to zero height.
Sync with xfns.c:
(x_laplace_read_row, x_laplace_write_row): Removed.
(postprocess_image): New function.
(lookup_image): Call it for all image types except PostScript.
(x_kill_gs_process): Call postprocess_image.
(tiff_error_handler, tiff_warning_handler): New functions.
(tiff_load): Install them as handlers.
(x_kill_gs_process): Recognize if someone has cleared the image
cache under us.
(valid_image_p): Protect better against invalid image
specifications. Previous code could signal an error.
(Fx_hide_tip, Fshow_tip): Doc fix.
(Fv_max_tooltip_size): New variable.
(syns_of_xfns): DEFVAR_LISP it.
(Fx_show_tip): Add parameter TEXT. Set the tip frame's root
window buffer to *tip* right after creating the frame. Set frame's
window_width. Use a maximum tooltip size specified by
Vx_max_tooltip_size, if that has valid contents.
(compute_tip_xy): Add parameters WIDTH and HEIGHT.
Make sure the tooltip is completely visible.
(x_create_tip_frame): Set tooltip buffer's truncate-lines to nil.
(Fx_create_frame): Adjust the frame's height for presence
of the tool bar before calling x_figure_window_size.
(x_set_tool_bar_lines): Clear the tool bar window's current matrix
when the window gets smaller.
(x_set_foreground_color): Set frame's cursor_pixel.
(x_set_foreground_color, x_set_background_color): Cleaned up.
(x_set_font): Handle case of x_new_fontset returning the same name
as before, although there was a change in fontsets.
Protect unibyte stings created by replacing their multibyte
equivalents in menu_items.
(w32_menu_show): Don't overwrite an item's name with its key
description in case the description is a multibyte string.
(single_submenu): Some cleanup.
