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/* ========================================================================= */
/**
* @file style.h
*
* @copyright
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __WLMTK_STYLE_H__
#define __WLMTK_STYLE_H__
#include <cairo.h>
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
/** Specifies the type of coloring to use for the fill. */
typedef enum {
/** Horizontal color gradient. */
WLMTK_STYLE_COLOR_SOLID,
/** Horizontal color gradient. */
WLMTK_STYLE_COLOR_HGRADIENT,
/** Vertical color gradient. */
WLMTK_STYLE_COLOR_VGRADIENT,
/**
* Diagonal color gradient, Cairo style.
*
* Colors are interpolated from top-left to bottom-right corner. Areas of
* equal color value are arranged perpendicular to that diagonal.
* This produces a smooth color flow across all rectangle edges.
*/
WLMTK_STYLE_COLOR_DGRADIENT,
/**
* Alternative diagonal color gradient, Window Maker style.
*
* Colors are interpolated from top-left to bottom-right corner. Areas of
* equal color value are aligned with the other diagonal -- from top-right
* to bottom-left.
* This may produce a steep gradient along the thin axis of long & thin
* rectangles, but is similar to what Window Maker uses.
*/
WLMTK_STYLE_COLOR_ADGRADIENT,
} wlmtk_style_fill_type_t;
/** Specifies the color for a solid fill. */
typedef struct {
/** Color to start from, as ARGB 8888. Left, for the HGRADIENT type. */
uint32_t color;
} wlmtk_style_color_solid_data_t;
/** Specifies the two colors to span a gradient between. */
typedef struct {
/** Color to start from, as ARGB 8888. Left, for the HGRADIENT type. */
uint32_t from;
/** Color to end with, as ARGB 8888. Right, for the HGRADIENT type. */
uint32_t to;
} wlmtk_style_color_gradient_data_t;
/** Specification for the fill of the titlebar. */
typedef struct {
/** The type of fill to apply. */
wlmtk_style_fill_type_t type;
/** Parameters for the fill. */
union {
/** Solid color. */
wlmtk_style_color_solid_data_t solid;
/** Horizontal color gradient. */
wlmtk_style_color_gradient_data_t hgradient;
/** Vertical color gradient. */
wlmtk_style_color_gradient_data_t vgradient;
/** Diagonal color gradient. */
wlmtk_style_color_gradient_data_t dgradient;
/** Alternative diagonal color gradient. */
wlmtk_style_color_gradient_data_t adgradient;
} param;
} wlmtk_style_fill_t;
/** Hardcoded max length of the font face name. */
#define WLMTK_STYLE_FONT_FACE_LENGTH 128
/** Weight of a font. */
typedef enum {
WLMTK_FONT_WEIGHT_NORMAL,
WLMTK_FONT_WEIGHT_BOLD,
} wlmtk_style_font_weight_t;
/** Style of font. */
typedef struct {
/** Font face family name. */
char face[WLMTK_STYLE_FONT_FACE_LENGTH];
/** Weight. */
wlmtk_style_font_weight_t weight;
/** Size of the font, in pixels per "em" square side. */
uint64_t size;
} wlmtk_style_font_t;
/** Specifies color and width of a margin. */
typedef struct {
/** Width of the margin. */
uint64_t width;
/** Color of the margin. */
uint32_t color;
} wlmtk_margin_style_t;
/** Styling information for the dock. */
typedef struct {
/** The margin's style of the dock's box. */
wlmtk_margin_style_t margin;
} wlmtk_dock_style_t;
/** Menu item style. */
typedef struct {
/** Fill style. */
wlmtk_style_fill_t fill;
/** Fill style when disabled. */
wlmtk_style_fill_t highlighted_fill;
/** Style of the font used in the menu item. */
wlmtk_style_font_t font;
/** Height of the menu item, in pixels. */
uint64_t height;
/** Width of the bezel, in pixels. */
uint64_t bezel_width;
/** Text color. */
uint32_t enabled_text_color;
/** Text color when highlighted. */
uint32_t highlighted_text_color;
/** Text color when disabled. */
uint32_t disabled_text_color;
/** Width of the item. */
uint64_t width;
} wlmtk_menu_item_style_t;
/** Style options for the resizebar. */
typedef struct {
/** Fill style for the complete resizebar. */
wlmtk_style_fill_t fill;
/** Height of the resize bar. */
uint64_t height;
/** Width of the corners. */
uint64_t corner_width;
/** Width of the bezel. */
uint64_t bezel_width;
} wlmtk_resizebar_style_t;
/** Style options for the titlebar. */
typedef struct {
/** Fill style for when the titlebar is focussed (activated). */
wlmtk_style_fill_t focussed_fill;
/** Fill style for when the titlebar is blurred (not activated). */
wlmtk_style_fill_t blurred_fill;
/** Color of the title text when focussed. */
uint32_t focussed_text_color;
/** Color of the title text when blurred. */
uint32_t blurred_text_color;
/** Height of the title bar, in pixels. */
uint64_t height;
/** Width of the bezel. */
uint64_t bezel_width;
/** Style of the margin within the resizebar. */
wlmtk_margin_style_t margin;
/** Font style for the titlebar's title. */
wlmtk_style_font_t font;
} wlmtk_titlebar_style_t;
/** Style options for the window. */
typedef struct {
/** The titlebar's style. */
wlmtk_titlebar_style_t titlebar;
/** The resizebar's style. */
wlmtk_resizebar_style_t resizebar;
/** Style of the window border. */
wlmtk_margin_style_t border;
/** Style of the margins between titlebar, window and resizebar. */
wlmtk_margin_style_t margin;
} wlmtk_window_style_t;
/** Translates the font weight from toolkit into cairo enum. */
cairo_font_weight_t wlmtk_style_font_weight_cairo_from_wlmtk(
wlmtk_style_font_weight_t weight);
#ifdef __cplusplus
} // extern "C"
#endif // __cplusplus
#endif /* __WLMTK_STYLE_H__ */
/* == End of style.h ================================================== */
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