feat(ags osk): allow adding borders to arc

nixosModules/ags/config/lib.ts

@@ -29,6 +29,54 @@ export interface CursorPos {
     y: number
 }
 
+type PointProps = [number, number] | {
+    x: number
+    y: number
+} | number;
+
+export class Point {
+    public x = 0;
+    public y = 0;
+
+    get values(): [number, number] {
+        return [this.x, this.y];
+    }
+
+    constructor(props?: PointProps, y?: number) {
+        if (typeof props === 'number') {
+            if (y) {
+                this.x = props;
+                this.y = y;
+            }
+            else {
+                throw new Error('Wrong props');
+            }
+        }
+        else if (Array.isArray(props)) {
+            this.x = props[0];
+            this.y = props[1];
+        }
+        else if (props) {
+            this.x = props.x;
+            this.y = props.y;
+        }
+    }
+}
+
+export type BezierPoints = [number, number, number, number];
+
+export class Bezier {
+    private _points: BezierPoints;
+
+    get points() {
+        return [...this._points] as BezierPoints;
+    }
+
+    constructor(x1: number, y1: number, x2: number, y2: number) {
+        this._points = [x1, y1, x2, y2];
+    }
+}
+
 
 export const get_hyprland_monitor = (monitor: Gdk.Monitor): AstalHyprland.Monitor | undefined => {
     const hyprland = AstalHyprland.get_default();

nixosModules/ags/config/widgets/on-screen-keyboard/arcs.tsx

@@ -1,12 +1,14 @@
-import { Gtk } from 'astal/gtk3';
+import { Gdk, Gtk } from 'astal/gtk3';
+
 import Cairo from 'cairo';
 
+import { Bezier, BezierPoints, Point } from '../../lib';
+
 /* Types */
-interface Point {
+type Side = 'top' | 'right' | 'bottom' | 'left';
-    x: number
+
-    y: number
+
-}
+const SIDES: Side[] = ['top', 'right', 'bottom', 'left'];
-type Bezier = [number, number, number, number];
 
 export default ({
     css = 'background-color: black;',
@@ -19,47 +21,115 @@ export default ({
             setup={(widget) => {
                 widget.set_size_request(allocation.width, allocation.height);
 
-                const styleContext = widget.get_style_context();
-                const bgColor = styleContext.get_background_color(Gtk.StateFlags.NORMAL);
-
                 widget.connect('draw', (_, cairoContext: Cairo.Context) => {
-                    const drawBezier = (dest: Point, curve: Bezier) => {
+                    widget.set_size_request(allocation.width, allocation.height);
-                        curve[0] *= (dest.x - cairoContext.getCurrentPoint()[0]);
-                        curve[0] += cairoContext.getCurrentPoint()[0];
 
-                        curve[1] *= (dest.y - cairoContext.getCurrentPoint()[1]);
+                    const styleContext = widget.get_style_context();
-                        curve[1] += cairoContext.getCurrentPoint()[1];
 
-                        curve[2] *= (dest.x - cairoContext.getCurrentPoint()[0]);
+                    const bgColor = styleContext.get_background_color(Gtk.StateFlags.NORMAL);
-                        curve[2] += cairoContext.getCurrentPoint()[0];
 
-                        curve[3] *= (dest.y - cairoContext.getCurrentPoint()[1]);
+                    const borderWidth = styleContext.get_border(Gtk.StateFlags.NORMAL);
-                        curve[3] += cairoContext.getCurrentPoint()[1];
+
+                    const borderColor = Object.fromEntries(SIDES.map((side) => [
+                        side,
+                        styleContext.get_property(
+                            `border-${side}-color`, Gtk.StateFlags.NORMAL,
+                        ) as Gdk.RGBA,
+                    ])) as Record<Side, Gdk.RGBA>;
+
+                    /*
+                     * Draws a cubic bezier curve from the current point
+                     * of the cairo context.
+                     *
+                     * @param dest  the destination point of the curve
+                     * @param curve the cubic bezier's control points. this
+                     *              is the same as a CSS easing function
+                     */
+                    const drawBezier = (dest: Point, curve: BezierPoints): void => {
+                        const start = new Point(cairoContext.getCurrentPoint());
+
+                        // Converts the ratios to absolute coordinates
+                        curve[0] = curve[0] * (dest.x - start.x) + start.x;
+                        curve[1] = curve[1] * (dest.y - start.y) + start.y;
+                        curve[2] = curve[2] * (dest.x - start.x) + start.x;
+                        curve[3] = curve[3] * (dest.y - start.y) + start.y;
 
                         cairoContext.curveTo(...curve, dest.x, dest.y);
                     };
 
+                    const colorBorder = (
+                        side: Side,
+                        start: Point,
+                        dest: Point,
+                        curve?: BezierPoints,
+                    ) => {
+                        cairoContext.moveTo(...start.values);
+
+                        if (curve) {
+                            drawBezier(dest, curve);
+                        }
+                        else {
+                            cairoContext.lineTo(...dest.values);
+                        }
+
+                        cairoContext.setLineWidth(borderWidth[side]);
+                        cairoContext.setSourceRGBA(
+                            borderColor[side].red,
+                            borderColor[side].green,
+                            borderColor[side].blue,
+                            borderColor[side].alpha,
+                        );
+
+                        cairoContext.stroke();
+                    };
+
+                    const bottomLeft = new Point({
+                        x: 0,
+                        y: allocation.height,
+                    });
+
+                    const topLeft = new Point({
+                        x: 0,
+                        y: 0,
+                    });
+
+                    const middleLeft = new Point({
+                        x: allocation.width / 3,
+                        y: allocation.height * 0.8,
+                    });
+
+                    const middleRight = new Point({
+                        x: (allocation.width / 3) * 2,
+                        y: allocation.height * 0.8,
+                    });
+
+                    const topRight = new Point({
+                        x: allocation.width,
+                        y: 0,
+                    });
+
+                    const bottomRight = new Point({
+                        x: allocation.width,
+                        y: allocation.height,
+                    });
+
+                    const bezier = new Bezier(0.76, 0, 0.24, 1);
+
                     // bottom left to top left
-                    cairoContext.moveTo(0, allocation.height);
+                    cairoContext.moveTo(...bottomLeft.values);
-                    cairoContext.lineTo(0, 0);
+                    cairoContext.lineTo(...topLeft.values);
 
                     // top left to middle left
-                    drawBezier(
+                    drawBezier(middleLeft, bezier.points);
-                        { x: allocation.width / 3, y: allocation.height * 0.8 },
-                        [0.76, 0, 0.24, 1],
-                    );
 
                     // middle left to middle right
-                    cairoContext.lineTo((allocation.width / 3) * 2, allocation.height * 0.8);
+                    cairoContext.lineTo(...middleRight.values);
 
                     // middle right to top right
-                    drawBezier(
+                    drawBezier(topRight, bezier.points);
-                        { x: allocation.width, y: 0 },
-                        [0.76, 0, 0.24, 1],
-                    );
 
                     // top right to bottom right
-                    cairoContext.lineTo(allocation.width, allocation.height);
+                    cairoContext.lineTo(...bottomRight.values);
 
                     // bottom right to bottom left
                     cairoContext.closePath();
@@ -67,6 +137,13 @@ export default ({
                     // Add color
                     cairoContext.setSourceRGBA(bgColor.red, bgColor.green, bgColor.blue, bgColor.alpha);
                     cairoContext.fill();
+
+                    colorBorder('left', bottomLeft, topLeft);
+                    colorBorder('top', topLeft, middleLeft, bezier.points);
+                    colorBorder('top', middleLeft, middleRight);
+                    colorBorder('top', middleRight, topRight, bezier.points);
+                    colorBorder('right', topRight, bottomRight);
+                    colorBorder('bottom', bottomLeft, bottomRight);
                 });
             }}
         />