NativeScript/nativescript-core/ui/styling/background-common.ts

// Deifinitions.
import { Background as BackgroundDefinition } from "./background";
import { BackgroundRepeat } from "../core/view";
import { LinearGradient } from "./linear-gradient";
// Types.
import { Color } from "../../color";

export class Background implements BackgroundDefinition {
    public static default = new Background();

    public color: Color;
    public image: string | LinearGradient;
    public repeat: BackgroundRepeat;
    public position: string;
    public size: string;
    public borderTopColor: Color;
    public borderRightColor: Color;
    public borderBottomColor: Color;
    public borderLeftColor: Color;
    public borderTopWidth: number = 0;
    public borderRightWidth: number = 0;
    public borderBottomWidth: number = 0;
    public borderLeftWidth: number = 0;
    public borderTopLeftRadius: number = 0;
    public borderTopRightRadius: number = 0;
    public borderBottomLeftRadius: number = 0;
    public borderBottomRightRadius: number = 0;
    public clipPath: string;

    private clone(): Background {
        const clone = new Background();

        clone.color = this.color;
        clone.image = this.image;
        clone.repeat = this.repeat;
        clone.position = this.position;
        clone.size = this.size;
        clone.borderTopColor = this.borderTopColor;
        clone.borderRightColor = this.borderRightColor;
        clone.borderBottomColor = this.borderBottomColor;
        clone.borderLeftColor = this.borderLeftColor;
        clone.borderTopWidth = this.borderTopWidth;
        clone.borderRightWidth = this.borderRightWidth;
        clone.borderBottomWidth = this.borderBottomWidth;
        clone.borderLeftWidth = this.borderLeftWidth;
        clone.borderTopLeftRadius = this.borderTopLeftRadius;
        clone.borderTopRightRadius = this.borderTopRightRadius;
        clone.borderBottomRightRadius = this.borderBottomRightRadius;
        clone.borderBottomLeftRadius = this.borderBottomLeftRadius;
        clone.clipPath = this.clipPath;

        return clone;
    }

    public withColor(value: Color): Background {
        const clone = this.clone();
        clone.color = value;

        return clone;
    }

    public withImage(value: string | LinearGradient): Background {
        const clone = this.clone();
        clone.image = value;

        return clone;
    }

    public withRepeat(value: BackgroundRepeat): Background {
        const clone = this.clone();
        clone.repeat = value;

        return clone;
    }

    public withPosition(value: string): Background {
        const clone = this.clone();
        clone.position = value;

        return clone;
    }

    public withSize(value: string): Background {
        const clone = this.clone();
        clone.size = value;

        return clone;
    }

    public withBorderTopColor(value: Color): Background {
        const clone = this.clone();
        clone.borderTopColor = value;

        return clone;
    }

    public withBorderRightColor(value: Color): Background {
        const clone = this.clone();
        clone.borderRightColor = value;

        return clone;
    }

    public withBorderBottomColor(value: Color): Background {
        const clone = this.clone();
        clone.borderBottomColor = value;

        return clone;
    }

    public withBorderLeftColor(value: Color): Background {
        const clone = this.clone();
        clone.borderLeftColor = value;

        return clone;
    }

    public withBorderTopWidth(value: number): Background {
        const clone = this.clone();
        clone.borderTopWidth = value;

        return clone;
    }

    public withBorderRightWidth(value: number): Background {
        const clone = this.clone();
        clone.borderRightWidth = value;

        return clone;
    }

    public withBorderBottomWidth(value: number): Background {
        const clone = this.clone();
        clone.borderBottomWidth = value;

        return clone;
    }

    public withBorderLeftWidth(value: number): Background {
        const clone = this.clone();
        clone.borderLeftWidth = value;

        return clone;
    }

    public withBorderTopLeftRadius(value: number): Background {
        const clone = this.clone();
        clone.borderTopLeftRadius = value;

        return clone;
    }

    public withBorderTopRightRadius(value: number): Background {
        const clone = this.clone();
        clone.borderTopRightRadius = value;

        return clone;
    }

    public withBorderBottomRightRadius(value: number): Background {
        const clone = this.clone();
        clone.borderBottomRightRadius = value;

        return clone;
    }

    public withBorderBottomLeftRadius(value: number): Background {
        const clone = this.clone();
        clone.borderBottomLeftRadius = value;

        return clone;
    }

    public withClipPath(value: string): Background {
        const clone = this.clone();
        clone.clipPath = value;

        return clone;
    }

    public isEmpty(): boolean {
        return !this.color
            && !this.image
            && !this.hasBorderWidth()
            && !this.hasBorderRadius()
            && !this.clipPath;
    }

    public static equals(value1: Background, value2: Background): boolean {
        // both values are falsy
        if (!value1 && !value2) {
            return true;
        }

        // only one is falsy
        if (!value1 || !value2) {
            return false;
        }

        let imagesEqual = false;
        if (value1 instanceof LinearGradient && value2 instanceof LinearGradient) {
            imagesEqual = LinearGradient.equals(value1, value2);
        } else {
            imagesEqual = value1.image === value2.image;
        }

        return Color.equals(value1.color, value2.color)
            && imagesEqual
            && value1.position === value2.position
            && value1.repeat === value2.repeat
            && value1.size === value2.size
            && Color.equals(value1.borderTopColor, value2.borderTopColor)
            && Color.equals(value1.borderRightColor, value2.borderRightColor)
            && Color.equals(value1.borderBottomColor, value2.borderBottomColor)
            && Color.equals(value1.borderLeftColor, value2.borderLeftColor)
            && value1.borderTopWidth === value2.borderTopWidth
            && value1.borderRightWidth === value2.borderRightWidth
            && value1.borderBottomWidth === value2.borderBottomWidth
            && value1.borderLeftWidth === value2.borderLeftWidth
            && value1.borderTopLeftRadius === value2.borderTopLeftRadius
            && value1.borderTopRightRadius === value2.borderTopRightRadius
            && value1.borderBottomRightRadius === value2.borderBottomRightRadius
            && value1.borderBottomLeftRadius === value2.borderBottomLeftRadius
            && value1.clipPath === value2.clipPath;
    }

    public hasBorderColor(): boolean {
        return !!this.borderTopColor || !!this.borderRightColor || !!this.borderBottomColor || !!this.borderLeftColor;
    }

    public hasBorderWidth(): boolean {
        return this.borderTopWidth > 0
            || this.borderRightWidth > 0
            || this.borderBottomWidth > 0
            || this.borderLeftWidth > 0;
    }

    public hasBorderRadius(): boolean {
        return this.borderTopLeftRadius > 0
            || this.borderTopRightRadius > 0
            || this.borderBottomRightRadius > 0
            || this.borderBottomLeftRadius > 0;
    }

    public hasUniformBorderColor(): boolean {
        return Color.equals(this.borderTopColor, this.borderRightColor)
            && Color.equals(this.borderTopColor, this.borderBottomColor)
            && Color.equals(this.borderTopColor, this.borderLeftColor);
    }

    public hasUniformBorderWidth(): boolean {
        return this.borderTopWidth === this.borderRightWidth
            && this.borderTopWidth === this.borderBottomWidth
            && this.borderTopWidth === this.borderLeftWidth;
    }

    public hasUniformBorderRadius(): boolean {
        return this.borderTopLeftRadius === this.borderTopRightRadius
            && this.borderTopLeftRadius === this.borderBottomRightRadius
            && this.borderTopLeftRadius === this.borderBottomLeftRadius;
    }

    public hasUniformBorder(): boolean {
        return this.hasUniformBorderColor()
            && this.hasUniformBorderWidth()
            && this.hasUniformBorderRadius();
    }

    public getUniformBorderColor(): Color {
        if (this.hasUniformBorderColor()) {
            return this.borderTopColor;
        }

        return undefined;
    }

    public getUniformBorderWidth(): number {
        if (this.hasUniformBorderWidth()) {
            return this.borderTopWidth;
        }

        return 0;
    }

    public getUniformBorderRadius(): number {
        if (this.hasUniformBorderRadius()) {
            return this.borderTopLeftRadius;
        }

        return 0;
    }

    public toString(): string {
        return `isEmpty: ${this.isEmpty()}; color: ${this.color}; image: ${this.image}; repeat: ${this.repeat}; position: ${this.position}; size: ${this.size}; borderTopColor: ${this.borderTopColor}; borderRightColor: ${this.borderRightColor}; borderBottomColor: ${this.borderBottomColor}; borderLeftColor: ${this.borderLeftColor}; borderTopWidth: ${this.borderTopWidth}; borderRightWidth: ${this.borderRightWidth}; borderBottomWidth: ${this.borderBottomWidth}; borderLeftWidth: ${this.borderLeftWidth}; borderTopLeftRadius: ${this.borderTopLeftRadius}; borderTopRightRadius: ${this.borderTopRightRadius}; borderBottomRightRadius: ${this.borderBottomRightRadius}; borderBottomLeftRadius: ${this.borderBottomLeftRadius}; clipPath: ${this.clipPath};`;
    }
}