2002-02-05  Jon K Hellan  <hellan@acm.org>

	* src/style-color.c (style_color_new_uninterned): New
	function. Factored out of style_color_new. Creates color
	unconditionally, without using the hash table.
	(style_color_new): Factor out style_color_new_uninterned.
	(style_color_new_i8): New function. Create a style color from 8
	bit rgb values by cloning to 16 bits.
	(style_color_auto_font): New function. Returns an uninterned black
	to represent Excel auto font color.
	(style_color_auto_back): New function. Returns an uninterned white
	to represent Excel auto background color.
	(style_color_auto_pattern): New function. Returns an uninterned black
	to represent Excel auto pattern color.
	(color_equal): Include is_auto flag in comparison.
	(color_hash): Include is_auto flag in hash function.

	* src/style-color.h (style_color_new_i8, style_color_auto_font,
	style_color_auto_back, style_color_auto_pattern): Declare

	* src/sheet-style.c (struct _SheetStyleData): Add
	auto_pattern_color.
	(sheet_style_init): Initialize auto_pattern_color.
	(sheet_style_shutdown): Unref auto_pattern_color.
	(sheet_style_set_auto_pattern_color): New function. Set the auto
	pattern color for this sheet.
	(sheet_style_get_auto_pattern_color): New function. Get the auto
	pattern color for this sheet.

	* src/sheet-style.h (sheet_style_set_auto_pattern_color,
	sheet_style_get_auto_pattern_color): Declare.

	* src/dialogs/dialog-cell-format.c (border_get_mstyle): Use
        style_color_new_i8.

	* src/plugins/excel/ms-excel-read.c (black_or_white_contrast): Burn.
	(ms_excel_palette_get): Simplify to get autocolors right. We used
	to be too clever.
	(ms_sheet_map_color): Use style_color_new_i8 to convert from
	rgb888.
	(ms_excel_read_window2): Update pattern color according to
	icvHdr/rgbHdr grid color if fDefaultHdr flag says so.

	* src/plugins/applix/applix-read.c (applix_read_colormap): Use
        style_color_new_i8.