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Diffstat (limited to 'src/CustomComponents.vala')
| -rw-r--r-- | src/CustomComponents.vala | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/src/CustomComponents.vala b/src/CustomComponents.vala deleted file mode 100644 index 0a08c93..0000000 --- a/src/CustomComponents.vala +++ /dev/null @@ -1,513 +0,0 @@ -/* Copyright 2016 Software Freedom Conservancy Inc. - * - * This software is licensed under the GNU LGPL (version 2.1 or later). - * See the COPYING file in this distribution. - */ - -extern void qsort(void *p, size_t num, size_t size, GLib.CompareFunc func); - -public class ThemeLoader { - private struct LightweightColor { - public uchar red; - public uchar green; - public uchar blue; - - public LightweightColor() { - red = green = blue = 0; - } - } - - private const int NUM_SUPPORTED_INTENSITIES = 6; - private const int THEME_OUTLINE_COLOR = 0; - private const int THEME_BEVEL_DARKER_COLOR = 1; - private const int THEME_BEVEL_DARK_COLOR = 2; - private const int THEME_BASE_COLOR = 3; - private const int THEME_BEVEL_LIGHT_COLOR = 4; - private const int THEME_BEVEL_LIGHTER_COLOR = 5; - - private static LightweightColor[] theme_colors = null; - - private static void populate_theme_params() { - if (theme_colors != null) - return; - - theme_colors = new LightweightColor[NUM_SUPPORTED_INTENSITIES]; - - Gtk.Settings settings = Gtk.Settings.get_default(); - HashTable<string, Gdk.Color?> color_table = settings.color_hash; - Gdk.Color? base_color = color_table.lookup("bg_color"); - if (base_color == null && !Gdk.Color.parse("#fff", out base_color)) - error("can't parse color"); - - RGBAnalyticPixel base_color_analytic_rgb = - RGBAnalyticPixel.from_quantized_components(base_color.red >> 8, - base_color.green >> 8, base_color.blue >> 8); - HSVAnalyticPixel base_color_analytic_hsv = - HSVAnalyticPixel.from_rgb(base_color_analytic_rgb); - - HSVAnalyticPixel bevel_light_analytic_hsv = base_color_analytic_hsv; - bevel_light_analytic_hsv.light_value *= 1.15f; - bevel_light_analytic_hsv.light_value = - bevel_light_analytic_hsv.light_value.clamp(0.0f, 1.0f); - - HSVAnalyticPixel bevel_lighter_analytic_hsv = bevel_light_analytic_hsv; - bevel_lighter_analytic_hsv.light_value *= 1.15f; - bevel_lighter_analytic_hsv.light_value = - bevel_lighter_analytic_hsv.light_value.clamp(0.0f, 1.0f); - - HSVAnalyticPixel bevel_dark_analytic_hsv = base_color_analytic_hsv; - bevel_dark_analytic_hsv.light_value *= 0.85f; - bevel_dark_analytic_hsv.light_value = - bevel_dark_analytic_hsv.light_value.clamp(0.0f, 1.0f); - - HSVAnalyticPixel bevel_darker_analytic_hsv = bevel_dark_analytic_hsv; - bevel_darker_analytic_hsv.light_value *= 0.85f; - bevel_darker_analytic_hsv.light_value = - bevel_darker_analytic_hsv.light_value.clamp(0.0f, 1.0f); - - HSVAnalyticPixel outline_analytic_hsv = bevel_darker_analytic_hsv; - outline_analytic_hsv.light_value *= 0.66f; - outline_analytic_hsv.light_value = - outline_analytic_hsv.light_value.clamp(0.0f, 1.0f); - - RGBAnalyticPixel outline_analytic_rgb = outline_analytic_hsv.to_rgb(); - theme_colors[THEME_OUTLINE_COLOR] = - populate_one_theme_param(outline_analytic_rgb); - - RGBAnalyticPixel bevel_darker_analytic_rgb = bevel_darker_analytic_hsv.to_rgb(); - theme_colors[THEME_BEVEL_DARKER_COLOR] = - populate_one_theme_param(bevel_darker_analytic_rgb); - - RGBAnalyticPixel bevel_dark_analytic_rgb = bevel_dark_analytic_hsv.to_rgb(); - theme_colors[THEME_BEVEL_DARK_COLOR] = - populate_one_theme_param(bevel_dark_analytic_rgb); - - theme_colors[THEME_BASE_COLOR] = - populate_one_theme_param(base_color_analytic_rgb); - - RGBAnalyticPixel bevel_light_analytic_rgb = bevel_light_analytic_hsv.to_rgb(); - theme_colors[THEME_BEVEL_LIGHT_COLOR] = - populate_one_theme_param(bevel_light_analytic_rgb); - - RGBAnalyticPixel bevel_lighter_analytic_rgb = bevel_light_analytic_hsv.to_rgb(); - theme_colors[THEME_BEVEL_LIGHTER_COLOR] = - populate_one_theme_param(bevel_lighter_analytic_rgb); - } - - private static LightweightColor populate_one_theme_param(RGBAnalyticPixel from) { - LightweightColor into = LightweightColor(); - - into.red = (uchar)(from.red * 255.0f); - into.green = (uchar)(from.green * 255.0f); - into.blue = (uchar)(from.blue * 255.0f); - - return into; - } - - public static Gdk.Pixbuf load_icon(string source_basename) { - populate_theme_params(); - - Gdk.Pixbuf loaded_pixbuf = Resources.get_icon(source_basename, 0).copy(); - - /* Sweep through the icon image data loaded from disk and determine how many - unique colors are in it. We do this with the aid of a HashSet. */ - Gee.HashSet<RGBAnalyticPixel?> colors = - new Gee.HashSet<RGBAnalyticPixel?>(rgb_pixel_hash_func, - rgb_pixel_equal_func); - unowned uchar[] pixel_data = loaded_pixbuf.get_pixels(); - for (int j = 0; j < loaded_pixbuf.height; j++) { - for (int i = 0; i < loaded_pixbuf.width; i++) { - int pixel_index = (j * loaded_pixbuf.rowstride) + (i * loaded_pixbuf.n_channels); - - RGBAnalyticPixel pixel_color = RGBAnalyticPixel.from_quantized_components( - pixel_data[pixel_index], pixel_data[pixel_index + 1], - pixel_data[pixel_index + 2]); - colors.add(pixel_color); - } - } - - /* If the image data loaded from disk didn't contain NUM_SUPPORTED_INTENSITIES - colors, then we can't unambiguously map the colors in the loaded image data - to theme colors on the user's system, so propagate an error */ - if (colors.size != NUM_SUPPORTED_INTENSITIES) - error("ThemeLoader: load_icon: pixbuf does not contain the correct number " + - "of unique colors"); - - /* sort the colors in the loaded image data in order of increasing intensity; this - means that we have to convert the loaded colors from RGB to HSV format */ - HSVAnalyticPixel[] hsv_pixels = new HSVAnalyticPixel[6]; - int pixel_ticker = 0; - foreach (RGBAnalyticPixel rgb_pixel in colors) - hsv_pixels[pixel_ticker++] = HSVAnalyticPixel.from_rgb(rgb_pixel); - qsort(hsv_pixels, hsv_pixels.length, sizeof(HSVAnalyticPixel), hsv_pixel_compare_func); - - /* step through each pixel in the image data loaded from disk and map its color - to one of the user's theme colors */ - for (int j = 0; j < loaded_pixbuf.height; j++) { - for (int i = 0; i < loaded_pixbuf.width; i++) { - int pixel_index = (j * loaded_pixbuf.rowstride) + (i * loaded_pixbuf.n_channels); - RGBAnalyticPixel pixel_color = RGBAnalyticPixel.from_quantized_components( - pixel_data[pixel_index], pixel_data[pixel_index + 1], - pixel_data[pixel_index + 2]); - HSVAnalyticPixel pixel_color_hsv = HSVAnalyticPixel.from_rgb(pixel_color); - int this_intensity = 0; - for (int k = 0; k < NUM_SUPPORTED_INTENSITIES; k++) { - if (hsv_pixels[k].light_value == pixel_color_hsv.light_value) { - this_intensity = k; - break; - } - } - pixel_data[pixel_index] = theme_colors[this_intensity].red; - pixel_data[pixel_index + 1] = theme_colors[this_intensity].green; - pixel_data[pixel_index + 2] = theme_colors[this_intensity].blue; - } - } - - return loaded_pixbuf; - } - - private static int hsv_pixel_compare_func(void* pixval1, void* pixval2) { - HSVAnalyticPixel pixel_val_1 = * ((HSVAnalyticPixel*) pixval1); - HSVAnalyticPixel pixel_val_2 = * ((HSVAnalyticPixel*) pixval2); - - return (int) (255.0f * (pixel_val_1.light_value - pixel_val_2.light_value)); - } - - private static bool rgb_pixel_equal_func(RGBAnalyticPixel? p1, RGBAnalyticPixel? p2) { - return (p1.equals(p2)); - } - - private static uint rgb_pixel_hash_func(RGBAnalyticPixel? pixel_val) { - return pixel_val.hash_code(); - } -} - -public class RGBHistogramManipulator : Gtk.DrawingArea { - private enum LocationCode { LEFT_NUB, RIGHT_NUB, LEFT_TROUGH, RIGHT_TROUGH, - INSENSITIVE_AREA } - private const int NUB_SIZE = 13; - private const int NUB_HALF_WIDTH = NUB_SIZE / 2; - private const int NUB_V_NUDGE = 4; - private const int TROUGH_WIDTH = 256 + (2 * NUB_HALF_WIDTH); - private const int TROUGH_HEIGHT = 4; - private const int TROUGH_BOTTOM_OFFSET = 1; - private const int CONTROL_WIDTH = TROUGH_WIDTH + 2; - private const int CONTROL_HEIGHT = 118; - private const int NUB_V_POSITION = CONTROL_HEIGHT - TROUGH_HEIGHT - TROUGH_BOTTOM_OFFSET - - (NUB_SIZE - TROUGH_HEIGHT) / 2 - NUB_V_NUDGE - 2; - private int left_nub_max = 255 - NUB_SIZE - 1; - private int right_nub_min = NUB_SIZE + 1; - - private static Gtk.Widget dummy_slider = null; - private static Gtk.Widget dummy_frame = null; - private static Gtk.WidgetPath slider_draw_path = new Gtk.WidgetPath(); - private static Gtk.WidgetPath frame_draw_path = new Gtk.WidgetPath(); - private static bool paths_setup = false; - - private RGBHistogram histogram = null; - private int left_nub_position = 0; - private int right_nub_position = 255; - private Gdk.Pixbuf nub_pixbuf = ThemeLoader.load_icon("drag_nub.png"); - private bool is_left_nub_tracking = false; - private bool is_right_nub_tracking = false; - private int track_start_x = 0; - private int track_nub_start_position = 0; - - public RGBHistogramManipulator( ) { - set_size_request(CONTROL_WIDTH, CONTROL_HEIGHT); - - if (dummy_slider == null) - dummy_slider = new Gtk.Scale(Gtk.Orientation.HORIZONTAL, null); - - if (dummy_frame == null) - dummy_frame = new Gtk.Frame(null); - - if (!paths_setup) { - slider_draw_path.append_type(typeof(Gtk.Scale)); - slider_draw_path.iter_add_class(0, "scale"); - slider_draw_path.iter_add_class(0, "range"); - - frame_draw_path.append_type(typeof(Gtk.Frame)); - frame_draw_path.iter_add_class(0, "default"); - - paths_setup = true; - } - - add_events(Gdk.EventMask.BUTTON_PRESS_MASK); - add_events(Gdk.EventMask.BUTTON_RELEASE_MASK); - add_events(Gdk.EventMask.BUTTON_MOTION_MASK); - - button_press_event.connect(on_button_press); - button_release_event.connect(on_button_release); - motion_notify_event.connect(on_button_motion); - } - - private LocationCode hit_test_point(int x, int y) { - if (y < NUB_V_POSITION) - return LocationCode.INSENSITIVE_AREA; - - if ((x > left_nub_position) && (x < left_nub_position + NUB_SIZE)) - return LocationCode.LEFT_NUB; - - if ((x > right_nub_position) && (x < right_nub_position + NUB_SIZE)) - return LocationCode.RIGHT_NUB; - - if (y < (NUB_V_POSITION + NUB_V_NUDGE + 1)) - return LocationCode.INSENSITIVE_AREA; - - if ((x - left_nub_position) * (x - left_nub_position) < - (x - right_nub_position) * (x - right_nub_position)) - return LocationCode.LEFT_TROUGH; - else - return LocationCode.RIGHT_TROUGH; - } - - private bool on_button_press(Gdk.EventButton event_record) { - LocationCode loc = hit_test_point((int) event_record.x, (int) event_record.y); - - switch (loc) { - case LocationCode.LEFT_NUB: - track_start_x = ((int) event_record.x); - track_nub_start_position = left_nub_position; - is_left_nub_tracking = true; - return true; - - case LocationCode.RIGHT_NUB: - track_start_x = ((int) event_record.x); - track_nub_start_position = right_nub_position; - is_right_nub_tracking = true; - return true; - - case LocationCode.LEFT_TROUGH: - left_nub_position = ((int) event_record.x) - NUB_HALF_WIDTH; - left_nub_position = left_nub_position.clamp(0, left_nub_max); - force_update(); - nub_position_changed(); - update_nub_extrema(); - return true; - - case LocationCode.RIGHT_TROUGH: - right_nub_position = ((int) event_record.x) - NUB_HALF_WIDTH; - right_nub_position = right_nub_position.clamp(right_nub_min, 255); - force_update(); - nub_position_changed(); - update_nub_extrema(); - return true; - - default: - return false; - } - } - - private bool on_button_release(Gdk.EventButton event_record) { - if (is_left_nub_tracking || is_right_nub_tracking) { - nub_position_changed(); - update_nub_extrema(); - } - - is_left_nub_tracking = false; - is_right_nub_tracking = false; - - return false; - } - - private bool on_button_motion(Gdk.EventMotion event_record) { - if ((!is_left_nub_tracking) && (!is_right_nub_tracking)) - return false; - - if (is_left_nub_tracking) { - int track_x_delta = ((int) event_record.x) - track_start_x; - left_nub_position = (track_nub_start_position + track_x_delta); - left_nub_position = left_nub_position.clamp(0, left_nub_max); - } else { /* right nub is tracking */ - int track_x_delta = ((int) event_record.x) - track_start_x; - right_nub_position = (track_nub_start_position + track_x_delta); - right_nub_position = right_nub_position.clamp(right_nub_min, 255); - } - - force_update(); - return true; - } - - public override bool draw(Cairo.Context ctx) { - Gtk.Border padding = get_style_context().get_padding(Gtk.StateFlags.NORMAL); - - Gdk.Rectangle area = Gdk.Rectangle(); - area.x = padding.left; - area.y = padding.top; - area.width = RGBHistogram.GRAPHIC_WIDTH + padding.right; - area.height = RGBHistogram.GRAPHIC_HEIGHT + padding.bottom; - - draw_histogram_frame(ctx, area); - draw_histogram(ctx, area); - draw_trough(ctx, area); - draw_nub(ctx, area, left_nub_position); - draw_nub(ctx, area, right_nub_position); - - return true; - } - - private void draw_histogram_frame(Cairo.Context ctx, Gdk.Rectangle area) { - // the framed area is inset and slightly smaller than the overall histogram - // control area - Gdk.Rectangle framed_area = area; - framed_area.x += 5; - framed_area.y += 1; - framed_area.width -= 8; - framed_area.height -= 12; - - Gtk.StyleContext stylectx = dummy_frame.get_style_context(); - stylectx.save(); - - stylectx.get_path().append_type(typeof(Gtk.Frame)); - stylectx.get_path().iter_add_class(0, "default"); - stylectx.add_class(Gtk.STYLE_CLASS_TROUGH); - stylectx.set_junction_sides(Gtk.JunctionSides.TOP | Gtk.JunctionSides.BOTTOM | - Gtk.JunctionSides.LEFT | Gtk.JunctionSides.RIGHT); - - stylectx.render_frame(ctx, framed_area.x, framed_area.y, framed_area.width, - framed_area.height); - - stylectx.restore(); - } - - private void draw_histogram(Cairo.Context ctx, Gdk.Rectangle area) { - if (histogram == null) - return; - - Gdk.Pixbuf histogram_graphic = histogram.get_graphic().copy(); - unowned uchar[] pixel_data = histogram_graphic.get_pixels(); - - int edge_blend_red = 0; - int edge_blend_green = 0; - int edge_blend_blue = 0; - int body_blend_red = 20; - int body_blend_green = 20; - int body_blend_blue = 20; - - if (left_nub_position > 0) { - int edge_pixel_index = histogram_graphic.n_channels * left_nub_position; - for (int i = 0; i < histogram_graphic.height; i++) { - int body_pixel_index = i * histogram_graphic.rowstride; - int row_last_pixel = body_pixel_index + histogram_graphic.n_channels * - left_nub_position; - while (body_pixel_index < row_last_pixel) { - pixel_data[body_pixel_index] = - (uchar) ((pixel_data[body_pixel_index] + body_blend_red) / 2); - pixel_data[body_pixel_index + 1] = - (uchar) ((pixel_data[body_pixel_index + 1] + body_blend_green) / 2); - pixel_data[body_pixel_index + 2] = - (uchar) ((pixel_data[body_pixel_index + 2] + body_blend_blue) / 2); - - body_pixel_index += histogram_graphic.n_channels; - } - - pixel_data[edge_pixel_index] = - (uchar) ((pixel_data[edge_pixel_index] + edge_blend_red) / 2); - pixel_data[edge_pixel_index + 1] = - (uchar) ((pixel_data[edge_pixel_index + 1] + edge_blend_green) / 2); - pixel_data[edge_pixel_index + 2] = - (uchar) ((pixel_data[edge_pixel_index + 2] + edge_blend_blue) / 2); - - edge_pixel_index += histogram_graphic.rowstride; - } - } - - edge_blend_red = 250; - edge_blend_green = 250; - edge_blend_blue = 250; - body_blend_red = 200; - body_blend_green = 200; - body_blend_blue = 200; - - if (right_nub_position < 255) { - int edge_pixel_index = histogram_graphic.n_channels * right_nub_position; - for (int i = 0; i < histogram_graphic.height; i++) { - int body_pixel_index = i * histogram_graphic.rowstride + - histogram_graphic.n_channels * 255; - int row_last_pixel = i * histogram_graphic.rowstride + - histogram_graphic.n_channels * right_nub_position; - while (body_pixel_index > row_last_pixel) { - pixel_data[body_pixel_index] = - (uchar) ((pixel_data[body_pixel_index] + body_blend_red) / 2); - pixel_data[body_pixel_index + 1] = - (uchar) ((pixel_data[body_pixel_index + 1] + body_blend_green) / 2); - pixel_data[body_pixel_index + 2] = - (uchar) ((pixel_data[body_pixel_index + 2] + body_blend_blue) / 2); - - body_pixel_index -= histogram_graphic.n_channels; - } - pixel_data[edge_pixel_index] = - (uchar) ((pixel_data[edge_pixel_index] + edge_blend_red) / 2); - pixel_data[edge_pixel_index + 1] = - (uchar) ((pixel_data[edge_pixel_index + 1] + edge_blend_green) / 2); - pixel_data[edge_pixel_index + 2] = - (uchar) ((pixel_data[edge_pixel_index + 2] + edge_blend_blue) / 2); - - edge_pixel_index += histogram_graphic.rowstride; - } - } - - Gdk.cairo_set_source_pixbuf(ctx, histogram_graphic, area.x + NUB_HALF_WIDTH, area.y + 2); - ctx.paint(); - } - - private void draw_trough(Cairo.Context ctx, Gdk.Rectangle area) { - int trough_x = area.x; - int trough_y = area.y + (CONTROL_HEIGHT - TROUGH_HEIGHT - TROUGH_BOTTOM_OFFSET - 3); - - Gtk.StyleContext stylectx = dummy_slider.get_style_context(); - stylectx.save(); - - stylectx.get_path().append_type(typeof(Gtk.Scale)); - stylectx.get_path().iter_add_class(0, "scale"); - stylectx.add_class(Gtk.STYLE_CLASS_TROUGH); - - stylectx.render_activity(ctx, trough_x, trough_y, TROUGH_WIDTH, TROUGH_HEIGHT); - - stylectx.restore(); - } - - private void draw_nub(Cairo.Context ctx, Gdk.Rectangle area, int position) { - Gdk.cairo_set_source_pixbuf(ctx, nub_pixbuf, area.x + position, area.y + NUB_V_POSITION); - ctx.paint(); - } - - private void force_update() { - get_window().invalidate_rect(null, true); - get_window().process_updates(true); - } - - private void update_nub_extrema() { - right_nub_min = left_nub_position + NUB_SIZE + 1; - left_nub_max = right_nub_position - NUB_SIZE - 1; - } - - public signal void nub_position_changed(); - - public void update_histogram(Gdk.Pixbuf source_pixbuf) { - histogram = new RGBHistogram(source_pixbuf); - force_update(); - } - - public int get_left_nub_position() { - return left_nub_position; - } - - public int get_right_nub_position() { - return right_nub_position; - } - - public void set_left_nub_position(int user_nub_pos) { - assert ((user_nub_pos >= 0) && (user_nub_pos <= 255)); - left_nub_position = user_nub_pos.clamp(0, left_nub_max); - update_nub_extrema(); - } - - public void set_right_nub_position(int user_nub_pos) { - assert ((user_nub_pos >= 0) && (user_nub_pos <= 255)); - right_nub_position = user_nub_pos.clamp(right_nub_min, 255); - update_nub_extrema(); - } -} - |