/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* eel-gdk-extensions.c: Graphics routines to augment what's in gdk.

   Copyright (C) 1999, 2000 Eazel, Inc.

   The Mate Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The Mate Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the Mate Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

   Authors: Darin Adler <darin@eazel.com>,
            Pavel Cisler <pavel@eazel.com>,
            Ramiro Estrugo <ramiro@eazel.com>
*/

#include <config.h>
#include "eel-gdk-extensions.h"

#include "eel-glib-extensions.h"
#include "eel-lib-self-check-functions.h"
#include "eel-string.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk/gdkprivate.h>
#include <gdk/gdk.h>
#include <gdk/gdkx.h>
#include <stdlib.h>
#include <pango/pango.h>

#define GRADIENT_BAND_SIZE 4

/**
 * eel_gdk_rectangle_contains_rectangle:
 * @outer: Rectangle possibly containing another rectangle.
 * @inner: Rectangle that might be inside.
 *
 * Retun TRUE if inner rectangle is contained inside outer rectangle
 */
gboolean
eel_gdk_rectangle_contains_rectangle (GdkRectangle outer, GdkRectangle inner)
{
    return outer.x <= inner.x && outer.x + outer.width >= inner.x + inner.width
           && outer.y <= inner.y && outer.y + outer.height >= inner.y + inner.height;
}

/**
 * eel_interpolate_color:
 * @ratio: Place on line between colors to interpolate.
 * @start_color: Color for one end.
 * @end_color: Color for the other end
 * @interpolated_color: Result.
 *
 * Compute a color between @start_color and @end_color in color space.
 * Currently, the color space used is RGB, but a future version could
 * instead do the interpolation in the best color space for expressing
 * human perception.
 */
guint32
eel_interpolate_color (gdouble ratio,
                       guint32 start_rgb,
                       guint32 end_rgb)
{
    guchar red, green, blue;

    g_return_val_if_fail (ratio >= 0.0, 0);
    g_return_val_if_fail (ratio <= 1.0, 0);

    red = ((start_rgb >> 16) & 0xFF) * (1.0 - ratio) + ((end_rgb >> 16) & 0xFF) * ratio;
    green = ((start_rgb >> 8) & 0xFF) * (1.0 - ratio) + ((end_rgb >> 8) & 0xFF) * ratio;
    blue = (start_rgb & 0xFF) * (1.0 - ratio) + (end_rgb & 0xFF) * ratio;
    return (((red << 8) | green) << 8) | blue;
}

/**
 * eel_gradient_new
 * @start_color: Color for the top or left.
 * @end_color: Color for the bottom or right.
 * @is_horizontal: Direction of the gradient.
 *
 * Create a string that combines the start and end colors along
 * with the direction of the gradient in a standard format.
 */
char *
eel_gradient_new (const char *start_color,
                  const char *end_color,
                  gboolean is_horizontal)
{
    /* Handle the special case where the start and end colors are identical.
       Handle the special case where the end color is an empty string.
    */
    if (eel_strcmp(start_color, end_color) == 0 || end_color == NULL || end_color[0] == '\0')
    {
        return g_strdup (start_color);
    }

    /* Handle the special case where the start color is an empty string. */
    if (start_color == NULL || start_color[0] == '\0')
    {
        return g_strdup (end_color);
    }

    /* Handle the general case. */
    return g_strconcat (start_color, "-", end_color, is_horizontal ? ":h" : NULL, NULL);
}

/**
 * eel_gradient_is_gradient
 * @gradient_spec: A gradient spec. string.
 *
 * Return true if the spec. specifies a gradient instead of a solid color.
 */
gboolean
eel_gradient_is_gradient (const char *gradient_spec)
{
    return eel_strchr (gradient_spec, '-') != NULL;
}

/**
 * eel_gradient_is_horizontal
 * @gradient_spec: A gradient spec. string.
 *
 * Return true if the spec. specifies a horizontal gradient.
 */
gboolean
eel_gradient_is_horizontal (const char *gradient_spec)
{
    size_t length;

    length = eel_strlen (gradient_spec);
    return length >= 2 && gradient_spec[length - 2] == ':' && gradient_spec[length - 1] == 'h';
}

static char *
eel_gradient_strip_trailing_direction_if_any (const char *gradient_spec)
{
    size_t length;

    length = eel_strlen (gradient_spec);
    if (length >= 2 && gradient_spec[length - 2] == ':'
            && (gradient_spec[length - 1] == 'v' || gradient_spec[length - 1] == 'h'))
    {
        length -= 2;
    }

    return g_strndup (gradient_spec, length);
}

/* For parsing n-point gradients. Successive calls should pass the next_spec value
 * set by the previous call as their first argument - to continue parsing where the
 * previous call left off.
 */
char *
eel_gradient_parse_one_color_spec (const char *spec, int *percent, const char **next_spec)
{
    char *result;
    const char *rgb_end_ptr;
    const char *percent_ptr;
    const char *separator_ptr;

    percent_ptr   = eel_strchr (spec, '%');
    separator_ptr = eel_strchr (spec, '-');

    if (percent_ptr != NULL && (separator_ptr == NULL || percent_ptr < separator_ptr))
    {
        if (percent != NULL)
        {
            *percent = (int) strtol (percent_ptr + 1, NULL, 10);
        }
        rgb_end_ptr = percent_ptr;
    }
    else
    {
        if (percent != NULL)
        {
            *percent = 100;
        }
        rgb_end_ptr = separator_ptr;
    }

    if (rgb_end_ptr != NULL)
    {
        result = g_strndup (spec, rgb_end_ptr - spec);
    }
    else
    {
        result = eel_gradient_strip_trailing_direction_if_any (spec);
    }

    /* It's important not to use spec after setting *next_spec because it's
     * likely that *next_spec == spec.
     */
    if (next_spec != NULL)
    {
        *next_spec = (separator_ptr != NULL) ? separator_ptr + 1 : NULL;
    }

    return result;
}

/* FIXME bugzilla.eazel.com 5076:
 * anyone using eel_gradient_get_start_color_spec or
 * eel_gradient_get_end_color_spec is assuming the gradient
 * is 2 colors which is questionable.
 *
 * Callers should be rewritten and these fns eliminated.
 */

/**
 * eel_gradient_get_start_color_spec
 * @gradient_spec: A gradient spec. string.
 *
 * Return the start color.
 * This may be the entire gradient_spec if it's a solid color.
 */
char *
eel_gradient_get_start_color_spec (const char *gradient_spec)
{
    return eel_gradient_parse_one_color_spec (gradient_spec, NULL, NULL);
}

/**
 * eel_gradient_get_end_color_spec
 * @gradient_spec: A gradient spec. string.
 *
 * Return the end color.
 * This may be the entire gradient_spec if it's a solid color.
 */
char *
eel_gradient_get_end_color_spec (const char *gradient_spec)
{
    char* color = NULL;

    do
    {
        g_free (color);
        color = eel_gradient_parse_one_color_spec (gradient_spec, NULL, &gradient_spec);
    }
    while (gradient_spec != NULL);

    return color;
}

/* Do the work shared by all the set_color_spec functions below. */
static char *
eel_gradient_set_edge_color (const char *gradient_spec,
                             const char *edge_color,
                             gboolean is_horizontal,
                             gboolean change_end)
{
    char *opposite_color;
    char *result;

    g_assert (edge_color != NULL);

    /* Get the color from the existing gradient spec. for the opposite
       edge. This will parse away all the stuff we don't want from the
       old gradient spec.
    */
    opposite_color = change_end
                     ? eel_gradient_get_start_color_spec (gradient_spec)
                     : eel_gradient_get_end_color_spec (gradient_spec);

    /* Create a new gradient spec. The eel_gradient_new function handles
       some special cases, so we don't have to bother with them here.
    */
    result = eel_gradient_new (change_end ? opposite_color : edge_color,
                               change_end ? edge_color : opposite_color,
                               is_horizontal);

    g_free (opposite_color);

    return result;
}

/**
 * eel_gradient_set_left_color_spec
 * @gradient_spec: A gradient spec. string.
 * @left_color: Color spec. to replace left color with.
 *
 * Changes the left color to what's passed in.
 * This creates a horizontal gradient.
 */
char *
eel_gradient_set_left_color_spec (const char *gradient_spec,
                                  const char *left_color)
{
    g_return_val_if_fail (gradient_spec != NULL, NULL);
    g_return_val_if_fail (left_color != NULL, NULL);

    return eel_gradient_set_edge_color (gradient_spec, left_color, TRUE, FALSE);
}

/**
 * eel_gradient_set_top_color_spec
 * @gradient_spec: A gradient spec. string.
 * @top_color: Color spec. to replace top color with.
 *
 * Changes the top color to what's passed in.
 * This creates a vertical gradient.
 */
char *
eel_gradient_set_top_color_spec (const char *gradient_spec,
                                 const char *top_color)
{
    g_return_val_if_fail (gradient_spec != NULL, NULL);
    g_return_val_if_fail (top_color != NULL, NULL);

    return eel_gradient_set_edge_color (gradient_spec, top_color, FALSE, FALSE);
}

/**
 * eel_gradient_set_right_color_spec
 * @gradient_spec: A gradient spec. string.
 * @right_color: Color spec. to replace right color with.
 *
 * Changes the right color to what's passed in.
 * This creates a horizontal gradient.
 */
char *
eel_gradient_set_right_color_spec (const char *gradient_spec,
                                   const char *right_color)
{
    g_return_val_if_fail (gradient_spec != NULL, NULL);
    g_return_val_if_fail (right_color != NULL, NULL);

    return eel_gradient_set_edge_color (gradient_spec, right_color, TRUE, TRUE);
}

/**
 * eel_gradient_set_bottom_color_spec
 * @gradient_spec: A gradient spec. string.
 * @bottom_color: Color spec. to replace bottom color with.
 *
 * Changes the bottom color to what's passed in.
 * This creates a vertical gradient.
 */
char *
eel_gradient_set_bottom_color_spec (const char *gradient_spec,
                                    const char *bottom_color)
{
    g_return_val_if_fail (gradient_spec != NULL, NULL);
    g_return_val_if_fail (bottom_color != NULL, NULL);

    return eel_gradient_set_edge_color (gradient_spec, bottom_color, FALSE, TRUE);
}

/**
 * eel_gdk_color_parse_with_white_default
 * @color_spec: A color spec, or NULL.
 * @color: Pointer to place to put resulting color.
 *
 * The same as gdk_color_parse, except sets the color to white if
 * the spec. can't be parsed, instead of returning a boolean flag.
 */
void
eel_gdk_color_parse_with_white_default (const char *color_spec,
                                        GdkColor *color)
{
    gboolean got_color;

    g_return_if_fail (color != NULL);

    got_color = FALSE;
    if (color_spec != NULL)
    {
        if (gdk_color_parse (color_spec, color))
        {
            got_color = TRUE;
        }
    }

    if (!got_color)
    {
        color->red = 0xFFFF;
        color->green = 0xFFFF;
        color->blue = 0xFFFF;
    }
}

/**
 * eel_parse_rgb_with_white_default
 * @color_spec: A color spec, or NULL.
 * Returns: An rgb value.
 *
 * The same as gdk_color_parse, except sets the color to white if
 * the spec. can't be parsed instead of returning a boolean flag
 * and returns a guint32 rgb value instead of a GdkColor.
 */
guint32
eel_parse_rgb_with_white_default (const char *color_spec)
{
    GdkColor color;

    eel_gdk_color_parse_with_white_default (color_spec, &color);
    return ((color.red << 8) & EEL_RGB_COLOR_RED)
           | (color.green & EEL_RGB_COLOR_GREEN)
           | ((color.blue >> 8) & EEL_RGB_COLOR_BLUE);
}

guint32
eel_rgb16_to_rgb (gushort r, gushort g, gushort b)
{
    guint32 result;

    result = (0xff0000 | (r & 0xff00));
    result <<= 8;
    result |= ((g & 0xff00) | (b >> 8));

    return result;
}

guint32
eel_rgb8_to_rgb (guchar r, guchar g, guchar b)
{
    return eel_rgb16_to_rgb (r << 8, g << 8, b << 8);
}

/**
 * eel_gdk_color_to_rgb
 * @color: A GdkColor style color.
 * Returns: An rgb value.
 *
 * Converts from a GdkColor stlye color to a gdk_rgb one.
 * Alpha gets set to fully opaque
 */
guint32
eel_gdk_color_to_rgb (const GdkColor *color)
{
    return eel_rgb16_to_rgb (color->red, color->green, color->blue);
}

/**
 * eel_gdk_rgb_to_color
 * @color: a gdk_rgb style value.
 *
 * Converts from a gdk_rgb value style to a GdkColor one.
 * The gdk_rgb color alpha channel is ignored.
 *
 * Return value: A GdkColor structure version of the given RGB color.
 */
GdkColor
eel_gdk_rgb_to_color (guint32 color)
{
    GdkColor result;

    result.red = ((color >> 16) & 0xFF) * 0x101;
    result.green = ((color >> 8) & 0xFF) * 0x101;
    result.blue = (color & 0xff) * 0x101;
    result.pixel = 0;

    return result;
}

/**
 * eel_gdk_rgb_to_color_spec
 * @color: a gdk_rgb style value.
 *
 * Converts from a gdk_rgb value style to a string color spec.
 * The gdk_rgb color alpha channel is ignored.
 *
 * Return value: a newly allocated color spec.
 */
char *
eel_gdk_rgb_to_color_spec (const guint32 color)
{
    return g_strdup_printf ("#%06X", (guint) (color & 0xFFFFFF));
}

static guint32
eel_shift_color_component (guchar component, float shift_by)
{
    guint32 result;
    if (shift_by > 1.0)
    {
        result = component * (2 - shift_by);
    }
    else
    {
        result = 0xff - shift_by * (0xff - component);
    }

    return result & 0xff;
}

/**
 * eel_rgb_shift_color
 * @color: A color.
 * @shift_by: darken or lighten factor.
 * Returns: An darkened or lightened rgb value.
 *
 * Darkens (@shift_by > 1) or lightens (@shift_by < 1)
 * @color.
 */
guint32
eel_rgb_shift_color (guint32 color, float shift_by)
{
    guint32 result;

    /* shift red by shift_by */
    result = eel_shift_color_component((color & 0x00ff0000) >> 16, shift_by);
    result <<= 8;
    /* shift green by shift_by */
    result |=  eel_shift_color_component((color & 0x0000ff00) >> 8, shift_by);
    result <<= 8;
    /* shift blue by shift_by */
    result |=  eel_shift_color_component((color & 0x000000ff), shift_by);

    /* alpha doesn't change */
    result |= (0xff000000 & color);

    return result;
}

/**
 * eel_gdk_color_is_dark:
 *
 * Return true if the given color is `dark'
 */
gboolean
eel_gdk_color_is_dark (GdkColor *color)
{
    int intensity;

    intensity = (((color->red >> 8) * 77)
                 + ((color->green >> 8) * 150)
                 + ((color->blue >> 8) * 28)) >> 8;

    return intensity < 128;
}

/**
 * eel_stipple_bitmap_for_screen:
 *
 * Get pointer to 50% stippled bitmap suitable for use
 * on @screen. This is a global object; do not free.
 */
GdkBitmap *
eel_stipple_bitmap_for_screen (GdkScreen *screen)
{
    static char       stipple_bits[] = { 0x02, 0x01 };
    static GPtrArray *stipples = NULL;
    int screen_num, n_screens, i;

    if (stipples == NULL)
    {
        n_screens = gdk_display_get_n_screens (
                        gdk_screen_get_display (screen));
        stipples = g_ptr_array_sized_new (n_screens);

        for (i = 0; i < n_screens; i++)
        {
            g_ptr_array_index (stipples, i) = NULL;
        }
    }

    screen_num = gdk_screen_get_number (screen);

    if (g_ptr_array_index (stipples, screen_num) == NULL)
    {
        g_ptr_array_index (stipples, screen_num) =
            gdk_bitmap_create_from_data (
                gdk_screen_get_root_window (screen),
                stipple_bits, 2, 2);
    }

    return g_ptr_array_index (stipples, screen_num);
}

/**
 * eel_stipple_bitmap:
 *
 * Get pointer to 50% stippled bitmap suitable for use
 * on the default screen. This is a global object; do
 * not free.
 *
 * This method is not multiscreen safe. Do not use it.
 */
GdkBitmap *
eel_stipple_bitmap (void)
{
    return eel_stipple_bitmap_for_screen (gdk_screen_get_default ());
}

/**
 * eel_gdk_window_bring_to_front:
 *
 * Raise window and give it focus.
 */
void
eel_gdk_window_bring_to_front (GdkWindow *window)
{
    /* This takes care of un-iconifying the window and
     * raising it if needed.
     */
    gdk_window_show (window);

    /* If the window was already showing, it would not have
     * the focus at this point. Do a little X trickery to
     * ensure it is focused.
     */
    eel_gdk_window_focus (window, GDK_CURRENT_TIME);
}

void
eel_gdk_window_focus (GdkWindow *window, guint32 timestamp)
{
    gdk_error_trap_push ();
    XSetInputFocus (GDK_DISPLAY (),
                    GDK_WINDOW_XWINDOW (window),
                    RevertToParent,
                    timestamp);
    gdk_flush();
    gdk_error_trap_pop ();
}

void
eel_gdk_window_set_wm_protocols (GdkWindow *window,
                                 GdkAtom *protocols,
                                 int nprotocols)
{
    Atom *atoms;
    int i;

    atoms = g_new (Atom, nprotocols);
    for (i = 0; i < nprotocols; i++)
    {
        atoms[i] = gdk_x11_atom_to_xatom (protocols[i]);
    }

    XSetWMProtocols (GDK_WINDOW_XDISPLAY (window),
                     GDK_WINDOW_XWINDOW (window),
                     atoms, nprotocols);

    g_free (atoms);
}

/**
 * eel_gdk_window_set_wm_hints_input:
 *
 * Set the WM_HINTS.input flag to the passed in value
 */
void
eel_gdk_window_set_wm_hints_input (GdkWindow *window, gboolean status)
{
    Display *dpy;
    Window id;
    XWMHints *wm_hints;

    g_return_if_fail (window != NULL);

    dpy = GDK_WINDOW_XDISPLAY (window);
    id = GDK_WINDOW_XWINDOW (window);

    wm_hints = XGetWMHints (dpy, id);
    if (wm_hints == 0)
    {
        wm_hints = XAllocWMHints ();
    }

    wm_hints->flags |= InputHint;
    wm_hints->input = (status == FALSE) ? False : True;

    XSetWMHints (dpy, id, wm_hints);
    XFree (wm_hints);
}

void
eel_gdk_window_set_invisible_cursor (GdkWindow *window)
{
    GdkBitmap *empty_bitmap;
    GdkCursor *cursor;
    GdkColor useless;
    char invisible_cursor_bits[] = { 0x0 };

    useless.red = useless.green = useless.blue = 0;
    useless.pixel = 0;

    empty_bitmap = gdk_bitmap_create_from_data (window,
                   invisible_cursor_bits,
                   1, 1);

    cursor = gdk_cursor_new_from_pixmap (empty_bitmap,
                                         empty_bitmap,
                                         &useless,
                                         &useless, 0, 0);

    gdk_window_set_cursor (window, cursor);

    gdk_cursor_unref (cursor);

    g_object_unref (empty_bitmap);
}

EelGdkGeometryFlags
eel_gdk_parse_geometry (const char *string, int *x_return, int *y_return,
                        guint *width_return, guint *height_return)
{
    int x11_flags;
    EelGdkGeometryFlags gdk_flags;

    g_return_val_if_fail (string != NULL, EEL_GDK_NO_VALUE);
    g_return_val_if_fail (x_return != NULL, EEL_GDK_NO_VALUE);
    g_return_val_if_fail (y_return != NULL, EEL_GDK_NO_VALUE);
    g_return_val_if_fail (width_return != NULL, EEL_GDK_NO_VALUE);
    g_return_val_if_fail (height_return != NULL, EEL_GDK_NO_VALUE);

    x11_flags = XParseGeometry (string, x_return, y_return,
                                width_return, height_return);

    gdk_flags = EEL_GDK_NO_VALUE;
    if (x11_flags & XValue)
    {
        gdk_flags |= EEL_GDK_X_VALUE;
    }
    if (x11_flags & YValue)
    {
        gdk_flags |= EEL_GDK_Y_VALUE;
    }
    if (x11_flags & WidthValue)
    {
        gdk_flags |= EEL_GDK_WIDTH_VALUE;
    }
    if (x11_flags & HeightValue)
    {
        gdk_flags |= EEL_GDK_HEIGHT_VALUE;
    }
    if (x11_flags & XNegative)
    {
        gdk_flags |= EEL_GDK_X_NEGATIVE;
    }
    if (x11_flags & YNegative)
    {
        gdk_flags |= EEL_GDK_Y_NEGATIVE;
    }

    return gdk_flags;
}

void
eel_gdk_draw_layout_with_drop_shadow (GdkDrawable         *drawable,
                                      GdkGC               *gc,
                                      GdkColor            *text_color,
                                      GdkColor            *shadow_color,
                                      int                  x,
                                      int                  y,
                                      PangoLayout         *layout)
{
    gdk_draw_layout_with_colors (drawable, gc,
                                 x+1, y+1,
                                 layout,
                                 shadow_color, NULL);

    gdk_draw_layout_with_colors (drawable, gc,
                                 x, y,
                                 layout,
                                 text_color, NULL);
}

#if ! defined (EEL_OMIT_SELF_CHECK)

static char *
eel_gdk_color_as_hex_string (GdkColor color)
{
    return g_strdup_printf ("%04X%04X%04X",
                            color.red, color.green, color.blue);
}

static char *
eel_self_check_parse (const char *color_spec)
{
    GdkColor color;

    eel_gdk_color_parse_with_white_default (color_spec, &color);
    return eel_gdk_color_as_hex_string (color);
}

static char *
eel_self_check_gdk_rgb_to_color (guint32 color)
{
    GdkColor result;

    result = eel_gdk_rgb_to_color (color);

    return eel_gdk_color_as_hex_string (result);
}

void
eel_self_check_gdk_extensions (void)
{
    /* eel_interpolate_color */
    EEL_CHECK_INTEGER_RESULT (eel_interpolate_color (0.0, 0, 0), 0);
    EEL_CHECK_INTEGER_RESULT (eel_interpolate_color (0.0, 0, 0xFFFFFF), 0);
    EEL_CHECK_INTEGER_RESULT (eel_interpolate_color (0.5, 0, 0xFFFFFF), 0x7F7F7F);
    EEL_CHECK_INTEGER_RESULT (eel_interpolate_color (1.0, 0, 0xFFFFFF), 0xFFFFFF);

    /* eel_gradient_new */
    EEL_CHECK_STRING_RESULT (eel_gradient_new ("", "", FALSE), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_new ("a", "b", FALSE), "a-b");
    EEL_CHECK_STRING_RESULT (eel_gradient_new ("a", "b", TRUE), "a-b:h");
    EEL_CHECK_STRING_RESULT (eel_gradient_new ("a", "a", FALSE), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_new ("a", "a", TRUE), "a");

    /* eel_gradient_is_gradient */
    EEL_CHECK_BOOLEAN_RESULT (eel_gradient_is_gradient (""), FALSE);
    EEL_CHECK_BOOLEAN_RESULT (eel_gradient_is_gradient ("-"), TRUE);
    EEL_CHECK_BOOLEAN_RESULT (eel_gradient_is_gradient ("a"), FALSE);
    EEL_CHECK_BOOLEAN_RESULT (eel_gradient_is_gradient ("a-b"), TRUE);
    EEL_CHECK_BOOLEAN_RESULT (eel_gradient_is_gradient ("a-b:h"), TRUE);

    /* eel_gradient_get_start_color_spec */
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec (""), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("-"), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a-b"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a-"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("-b"), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a:h"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a:v"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a:c"), "a:c");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a:-b"), "a:");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_start_color_spec ("a:-b:v"), "a:");

    /* eel_gradient_get_end_color_spec */
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec (""), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("-"), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a-b"), "b");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a-"), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("-b"), "b");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a:h"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a:v"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a:c"), "a:c");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a:-b"), "b");
    EEL_CHECK_STRING_RESULT (eel_gradient_get_end_color_spec ("a:-b:v"), "b");

    /* eel_gradient_set_left_color_spec */
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("", ""), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("a", ""), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("a", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("a", "b"), "b-a:h");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("a-c:v", "b"), "b-c:h");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("a-c:v", "c"), "c");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_left_color_spec ("a:-b:v", "d"), "d-b:h");

    /* eel_gradient_set_top_color_spec */
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("", ""), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("a", ""), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("a", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("a", "b"), "b-a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("a-c:v", "b"), "b-c");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("a-c:v", "c"), "c");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_top_color_spec ("a:-b:h", "d"), "d-b");

    /* eel_gradient_set_right_color_spec */
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("", ""), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("a", ""), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("a", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("a", "b"), "a-b:h");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("a-c:v", "b"), "a-b:h");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("a-c:v", "c"), "a-c:h");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_right_color_spec ("a:-b:v", "d"), "a:-d:h");

    /* eel_gradient_set_bottom_color_spec */
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("", ""), "");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("a", ""), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("a", "a"), "a");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("a", "b"), "a-b");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("a-c:v", "b"), "a-b");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("a-c:v", "c"), "a-c");
    EEL_CHECK_STRING_RESULT (eel_gradient_set_bottom_color_spec ("a:-b:h", "d"), "a:-d");

    /* eel_gdk_color_parse_with_white_default */
    EEL_CHECK_STRING_RESULT (eel_self_check_parse (""), "FFFFFFFFFFFF");
    EEL_CHECK_STRING_RESULT (eel_self_check_parse ("a"), "FFFFFFFFFFFF");
    EEL_CHECK_STRING_RESULT (eel_self_check_parse ("white"), "FFFFFFFFFFFF");
    EEL_CHECK_STRING_RESULT (eel_self_check_parse ("black"), "000000000000");
    EEL_CHECK_STRING_RESULT (eel_self_check_parse ("red"), "FFFF00000000");
    EEL_CHECK_STRING_RESULT (eel_self_check_parse ("#012345"), "010123234545");
    /* EEL_CHECK_STRING_RESULT (eel_self_check_parse ("rgb:0123/4567/89AB"), "#014589"); */

    /* eel_gdk_rgb_to_color */
    EEL_CHECK_STRING_RESULT (eel_self_check_gdk_rgb_to_color (EEL_RGB_COLOR_RED), "FFFF00000000");
    EEL_CHECK_STRING_RESULT (eel_self_check_gdk_rgb_to_color (EEL_RGB_COLOR_BLACK), "000000000000");
    EEL_CHECK_STRING_RESULT (eel_self_check_gdk_rgb_to_color (EEL_RGB_COLOR_WHITE), "FFFFFFFFFFFF");
    EEL_CHECK_STRING_RESULT (eel_self_check_gdk_rgb_to_color (EEL_RGB_COLOR_PACK (0x01, 0x23, 0x45)), "010123234545");

    /* EEL_RGBA_COLOR_PACK */
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0xFF, 0x00, 0x00, 00), EEL_RGB_COLOR_RED);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0x00, 0xFF, 0x00, 00), EEL_RGB_COLOR_GREEN);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0x00, 0x00, 0xFF, 00), EEL_RGB_COLOR_BLUE);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0xFF, 0xFF, 0xFF, 00), EEL_RGB_COLOR_WHITE);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0x00, 0x00, 0x00, 00), EEL_RGB_COLOR_BLACK);

    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0xFF, 0x00, 0x00, 0xFF), EEL_RGBA_COLOR_OPAQUE_RED);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0x00, 0xFF, 0x00, 0xFF), EEL_RGBA_COLOR_OPAQUE_GREEN);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0x00, 0x00, 0xFF, 0xFF), EEL_RGBA_COLOR_OPAQUE_BLUE);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0xFF, 0xFF, 0xFF, 0xFF), EEL_RGBA_COLOR_OPAQUE_WHITE);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_PACK (0x00, 0x00, 0x00, 0xFF), EEL_RGBA_COLOR_OPAQUE_BLACK);

    /* EEL_RGB_COLOR_PACK */
    EEL_CHECK_INTEGER_RESULT (EEL_RGB_COLOR_PACK (0xFF, 0x00, 0x00), EEL_RGBA_COLOR_OPAQUE_RED);
    EEL_CHECK_INTEGER_RESULT (EEL_RGB_COLOR_PACK (0x00, 0xFF, 0x00), EEL_RGBA_COLOR_OPAQUE_GREEN);
    EEL_CHECK_INTEGER_RESULT (EEL_RGB_COLOR_PACK (0x00, 0x00, 0xFF), EEL_RGBA_COLOR_OPAQUE_BLUE);
    EEL_CHECK_INTEGER_RESULT (EEL_RGB_COLOR_PACK (0xFF, 0xFF, 0xFF), EEL_RGBA_COLOR_OPAQUE_WHITE);
    EEL_CHECK_INTEGER_RESULT (EEL_RGB_COLOR_PACK (0x00, 0x00, 0x00), EEL_RGBA_COLOR_OPAQUE_BLACK);

    /* EEL_RGBA_COLOR_GET_R */
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGBA_COLOR_OPAQUE_RED), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGBA_COLOR_OPAQUE_GREEN), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGBA_COLOR_OPAQUE_BLUE), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGBA_COLOR_OPAQUE_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGBA_COLOR_OPAQUE_BLACK), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGB_COLOR_RED), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGB_COLOR_GREEN), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGB_COLOR_BLUE), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGB_COLOR_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_R (EEL_RGB_COLOR_BLACK), 0x00);

    /* EEL_RGBA_COLOR_GET_G */
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGBA_COLOR_OPAQUE_RED), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGBA_COLOR_OPAQUE_GREEN), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGBA_COLOR_OPAQUE_BLUE), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGBA_COLOR_OPAQUE_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGBA_COLOR_OPAQUE_BLACK), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGB_COLOR_RED), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGB_COLOR_GREEN), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGB_COLOR_BLUE), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGB_COLOR_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_G (EEL_RGB_COLOR_BLACK), 0x00);

    /* EEL_RGBA_COLOR_GET_B */
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGBA_COLOR_OPAQUE_RED), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGBA_COLOR_OPAQUE_GREEN), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGBA_COLOR_OPAQUE_BLUE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGBA_COLOR_OPAQUE_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGBA_COLOR_OPAQUE_BLACK), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGB_COLOR_RED), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGB_COLOR_GREEN), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGB_COLOR_BLUE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGB_COLOR_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_B (EEL_RGB_COLOR_BLACK), 0x00);

    /* EEL_RGBA_COLOR_GET_A */
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGBA_COLOR_OPAQUE_RED), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGBA_COLOR_OPAQUE_GREEN), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGBA_COLOR_OPAQUE_BLUE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGBA_COLOR_OPAQUE_WHITE), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGBA_COLOR_OPAQUE_BLACK), 0xFF);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGB_COLOR_RED), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGB_COLOR_GREEN), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGB_COLOR_BLUE), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGB_COLOR_WHITE), 0x00);
    EEL_CHECK_INTEGER_RESULT (EEL_RGBA_COLOR_GET_A (EEL_RGB_COLOR_BLACK), 0x00);

}

#endif /* ! EEL_OMIT_SELF_CHECK */
