command: allow alpha in colors, simplify code

doc/riverctl.1

@@ -170,9 +170,9 @@ List of valid options:
 .IP 	\(bu
 border_width (non-negative integer)
 .IP 	\(bu
-border_color_focused (RGB hex code)
+border_color_focused (RGB/RGBA hex code)
 .IP 	\(bu
-border_color_unfocused (RGB hex code)
+border_color_unfocused (RGB/RGBA hex code)
 .IP 	\(bu
 outer_padding (non-negative integer)
 

river/Config.zig

@@ -23,17 +23,16 @@ const c = @import("c.zig");
 
 const Log = @import("log.zig").Log;
 const Server = @import("Server.zig");
-const Rgb = @import("Rgb.zig");
 const Mapping = @import("Mapping.zig");
 
 /// Width of borders in pixels
 border_width: u32,
 
-/// Color of border of focused window in RGB
-border_color_focused: Rgb,
+/// Color of border of focused window in RGBA
+border_color_focused: [4]f32,
 
-/// Color of border of unfocused window in RGB
-border_color_unfocused: Rgb,
+/// Color of border of unfocused window in RGBA
+border_color_unfocused: [4]f32,
 
 /// Amount of view padding in pixels
 view_padding: u32,
@@ -52,8 +51,8 @@ float_filter: std.ArrayList([*:0]const u8),
 
 pub fn init(self: *Self, allocator: *std.mem.Allocator) !void {
     self.border_width = 2;
-    try self.border_color_focused.parseString("#93A1A1"); // Solarized base1
-    try self.border_color_unfocused.parseString("#586E75"); // Solarized base0
+    self.border_color_focused = [_]f32{ 0.57647059, 0.63137255, 0.63137255, 1.0 }; // Solarized base1
+    self.border_color_unfocused = [_]f32{ 0.34509804, 0.43137255, 0.45882353, 1.0 }; // Solarized base0
     self.view_padding = 8;
     self.outer_padding = 8;
 

river/Control.zig

@@ -126,7 +126,7 @@ fn runCommand(
                     command.Error.Overflow => "value out of bounds",
                     command.Error.InvalidCharacter => "invalid character in argument",
                     command.Error.InvalidDirection => "invalid direction. Must be 'next' or 'previous'",
-                    command.Error.InvalidRgbFormat => "invalid RGB format",
+                    command.Error.InvalidRgba => "invalid color format, must be #RRGGBB or #RRGGBBAA",
                     command.Error.OutOfMemory => "out of memory",
                     command.Error.CommandFailed => unreachable,
                 },

river/Rgb.zig

@@ -1,45 +0,0 @@
-// This file is part of river, a dynamic tiling wayland compositor.
-//
-// Copyright 2020 Rishabh Das
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program 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 General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <https://www.gnu.org/licenses/>.
-
-const Self = @This();
-
-const std = @import("std");
-
-r: u8,
-g: u8,
-b: u8,
-
-pub fn parseString(self: *Self, string: []const u8) !void {
-    if (string[0] != '#' or string.len != 7) return error.InvalidRgbFormat;
-
-    const r = try std.fmt.parseInt(u8, string[1..3], 16);
-    const g = try std.fmt.parseInt(u8, string[3..5], 16);
-    const b = try std.fmt.parseInt(u8, string[5..7], 16);
-
-    self.r = r;
-    self.g = g;
-    self.b = b;
-}
-
-pub fn getDecimalRgbaArray(self: Self) [4]f32 {
-    return [4]f32{
-        @intToFloat(f32, self.r) / 255.0,
-        @intToFloat(f32, self.g) / 255.0,
-        @intToFloat(f32, self.b) / 255.0,
-        1.0,
-    };
-}

river/command.zig

@@ -91,7 +91,7 @@ pub const Error = error{
     Overflow,
     InvalidCharacter,
     InvalidDirection,
-    InvalidRgbFormat,
+    InvalidRgba,
     UnknownOption,
     OutOfMemory,
     CommandFailed,

river/command/set_option.zig

@@ -38,7 +38,7 @@ pub fn setOption(
     if (args.len < 3) return Error.NotEnoughArguments;
     if (args.len > 3) return Error.TooManyArguments;
 
-    const config = &seat.focused_output.root.server.config;
+    const config = &seat.input_manager.server.config;
 
     // Parse option and value.
     const option = std.meta.stringToEnum(Option, args[1]) orelse return Error.UnknownOption;
@@ -46,11 +46,28 @@ pub fn setOption(
     // Assign value to option.
     switch (option) {
         .border_width => config.border_width = try std.fmt.parseInt(u32, args[2], 10),
-        .border_color_focused => try config.border_color_focused.parseString(args[2]),
-        .border_color_unfocused => try config.border_color_unfocused.parseString(args[2]),
+        .border_color_focused => config.border_color_focused = try parseRgba(args[2]),
+        .border_color_unfocused => config.border_color_unfocused = try parseRgba(args[2]),
         .outer_padding => config.outer_padding = try std.fmt.parseInt(u32, args[2], 10),
     }
 
     // 'Refresh' focused output to display the desired changes.
     seat.focused_output.root.arrange();
 }
+
+/// Parse a color in the format #RRGGBB or #RRGGBBAA
+pub fn parseRgba(string: []const u8) ![4]f32 {
+    if (string[0] != '#' or (string.len != 7 and string.len != 9)) return error.InvalidRgba;
+
+    const r = try std.fmt.parseInt(u8, string[1..3], 16);
+    const g = try std.fmt.parseInt(u8, string[3..5], 16);
+    const b = try std.fmt.parseInt(u8, string[5..7], 16);
+    const a = if (string.len == 9) try std.fmt.parseInt(u8, string[7..9], 16) else 255;
+
+    return [4]f32{
+        @intToFloat(f32, r) / 255.0,
+        @intToFloat(f32, g) / 255.0,
+        @intToFloat(f32, b) / 255.0,
+        @intToFloat(f32, a) / 255.0,
+    };
+}

river/render.zig

@@ -238,11 +238,12 @@ fn renderTexture(
 }
 
 fn renderBorders(output: Output, view: *View, now: *c.timespec) void {
+    const config = &output.root.server.config;
     var border: Box = undefined;
     const color = if (view.focused)
-        output.root.server.config.border_color_focused.getDecimalRgbaArray()
+        &output.root.server.config.border_color_focused
     else
-        output.root.server.config.border_color_unfocused.getDecimalRgbaArray();
+        &output.root.server.config.border_color_unfocused;
     const border_width = output.root.server.config.border_width;
 
     // left and right, covering the corners as well
@@ -272,13 +273,13 @@ fn renderBorders(output: Output, view: *View, now: *c.timespec) void {
     renderRect(output, border, color);
 }
 
-fn renderRect(output: Output, box: Box, color: [4]f32) void {
+fn renderRect(output: Output, box: Box, color: *const [4]f32) void {
     var wlr_box = box.toWlrBox();
     scaleBox(&wlr_box, output.wlr_output.scale);
     c.wlr_render_rect(
         output.getRenderer(),
         &wlr_box,
-        &color,
+        color,
         &output.wlr_output.transform_matrix,
     );
 }