@bokeh/bokehjs/build/js/lib/core/visuals/text.js

Interactive, novel data visualization

import { VisualProperties, VisualUniforms } from "./visual";
import * as mixins from "../property_mixins";
import { FontStyle, TextAlign, TextBaseline } from "../enums";
import { color2css } from "../util/color";
const _font_cache = new Map();
function load_font(font, obj) {
    const objs = _font_cache.get(font);
    if (objs == null) {
        const objs = new WeakSet([obj]);
        _font_cache.set(font, objs);
    }
    else if (!objs.has(obj)) {
        objs.add(obj);
    }
    else {
        return;
    }
    const { fonts } = document;
    if (!fonts.check(font)) {
        void fonts.load(font).then(() => obj.request_paint());
    }
}
export class Text extends VisualProperties {
    static __name__ = "Text";
    get doit() {
        const color = this.get_text_color();
        const alpha = this.get_text_alpha();
        return !(color == null || alpha == 0);
    }
    update() {
        if (!this.doit) {
            return;
        }
        const font = this.font_value();
        load_font(font, this.obj);
    }
    values() {
        return {
            color: this.get_text_color(),
            outline_color: this.get_text_outline_color(),
            alpha: this.get_text_alpha(),
            font: this.get_text_font(),
            font_size: this.get_text_font_size(),
            font_style: this.get_text_font_style(),
            align: this.get_text_align(),
            baseline: this.get_text_baseline(),
            line_height: this.get_text_line_height(),
        };
    }
    computed_values() {
        const color = this.get_text_color();
        const outline_color = this.get_text_outline_color();
        const alpha = this.get_text_alpha();
        return {
            color: color2css(color, alpha),
            outline_color: color2css(outline_color, alpha),
            font: this.font_value(),
            text_align: this.get_text_align(),
            text_baseline: this.get_text_baseline(),
            line_height: this.get_text_line_height(),
        };
    }
    set_value(ctx) {
        const { color, outline_color, font, text_align, text_baseline, } = this.computed_values();
        ctx.fillStyle = color;
        ctx.strokeStyle = outline_color;
        ctx.font = font;
        ctx.textAlign = text_align;
        ctx.textBaseline = text_baseline;
    }
    font_value() {
        const style = this.get_text_font_style();
        const size = this.get_text_font_size();
        const face = this.get_text_font();
        return `${style} ${size} ${face}`;
    }
    get_text_color() {
        const css_color = this._get_css_value("text-color");
        if (css_color != "") {
            return css_color;
        }
        return this.text_color.get_value();
    }
    get_text_outline_color() {
        const css_color = this._get_css_value("text-outline-color");
        if (css_color != "") {
            return css_color;
        }
        return this.text_outline_color.get_value();
    }
    get_text_alpha() {
        const css_alpha = this._get_css_value("text-alpha");
        if (css_alpha != "") {
            const alpha = Number(css_alpha);
            if (isFinite(alpha)) {
                return alpha;
            }
        }
        return this.text_alpha.get_value();
    }
    get_text_font() {
        const css_font = this._get_css_value("text-font");
        if (css_font != "") {
            return css_font;
        }
        return this.text_font.get_value();
    }
    get_text_font_size() {
        const css_font_size = this._get_css_value("text-font-size");
        if (css_font_size != "") {
            return css_font_size;
        }
        return this.text_font_size.get_value();
    }
    get_text_font_style() {
        const css_font_style = this._get_css_value("text-font-style");
        if (FontStyle.valid(css_font_style)) {
            return css_font_style;
        }
        return this.text_font_style.get_value();
    }
    get_text_align() {
        const css_align = this._get_css_value("text-align");
        if (TextAlign.valid(css_align)) {
            return css_align;
        }
        return this.text_align.get_value();
    }
    get_text_baseline() {
        const css_baseline = this._get_css_value("text-baseline");
        if (TextBaseline.valid(css_baseline)) {
            return css_baseline;
        }
        return this.text_baseline.get_value();
    }
    get_text_line_height() {
        const css_line_height = this._get_css_value("line-height");
        if (css_line_height != "") {
            const line_height = Number(css_line_height);
            if (isFinite(line_height)) {
                return line_height;
            }
        }
        return this.text_line_height.get_value();
    }
}
export class TextScalar extends VisualUniforms {
    static __name__ = "TextScalar";
    get doit() {
        const color = this.text_color.value;
        const alpha = this.text_alpha.value;
        return !(color == 0 || alpha == 0);
    }
    update() {
        if (!this.doit) {
            return;
        }
        const font = this.font_value();
        load_font(font, this.obj);
    }
    values() {
        return {
            color: this.text_color.value,
            outline_color: this.text_outline_color.value,
            alpha: this.text_alpha.value,
            font: this.text_font.value,
            font_size: this.text_font_size.value,
            font_style: this.text_font_style.value,
            align: this.text_align.value,
            baseline: this.text_baseline.value,
            line_height: this.text_line_height.value,
        };
    }
    set_value(ctx) {
        const color = this.text_color.value;
        const alpha = this.text_alpha.value;
        const outline_color = this.text_outline_color.value;
        const font = this.font_value();
        const align = this.text_align.value;
        const baseline = this.text_baseline.value;
        ctx.fillStyle = color2css(color, alpha);
        ctx.strokeStyle = color2css(outline_color, alpha);
        ctx.font = font;
        ctx.textAlign = align;
        ctx.textBaseline = baseline;
    }
    font_value() {
        const style = this.text_font_style.value;
        const size = this.text_font_size.value;
        const face = this.text_font.value;
        return `${style} ${size} ${face}`;
    }
}
export class TextVector extends VisualUniforms {
    static __name__ = "TextVector";
    _assert_font(i) {
        const font = this.font_value(i);
        load_font(font, this.obj);
    }
    values(i) {
        this._assert_font(i);
        return {
            color: this.text_color.get(i),
            outline_color: this.text_outline_color.get(i),
            alpha: this.text_alpha.get(i),
            font: this.text_font.get(i),
            font_size: this.text_font_size.get(i),
            font_style: this.text_font_style.get(i),
            align: this.text_align.get(i),
            baseline: this.text_baseline.get(i),
            line_height: this.text_line_height.get(i),
        };
    }
    get doit() {
        const { text_color } = this;
        if (text_color.is_Scalar() && text_color.value == 0) {
            return false;
        }
        const { text_alpha } = this;
        if (text_alpha.is_Scalar() && text_alpha.value == 0) {
            return false;
        }
        return true;
    }
    v_doit(i) {
        if (this.text_color.get(i) == 0) {
            return false;
        }
        if (this.text_alpha.get(i) == 0) {
            return false;
        }
        return true;
    }
    apply(ctx, i) {
        const doit = this.v_doit(i);
        if (doit) {
            this.set_vectorize(ctx, i);
        }
        return doit;
    }
    set_vectorize(ctx, i) {
        this._assert_font(i);
        const color = this.text_color.get(i);
        const outline_color = this.text_outline_color.get(i);
        const alpha = this.text_alpha.get(i);
        const font = this.font_value(i);
        const align = this.text_align.get(i);
        const baseline = this.text_baseline.get(i);
        ctx.fillStyle = color2css(color, alpha);
        ctx.strokeStyle = color2css(outline_color, alpha);
        ctx.font = font;
        ctx.textAlign = align;
        ctx.textBaseline = baseline;
    }
    font_value(i) {
        const style = this.text_font_style.get(i);
        const size = this.text_font_size.get(i);
        const face = this.text_font.get(i);
        return `${style} ${size} ${face}`;
    }
}
Text.prototype.type = "text";
Text.prototype.attrs = Object.keys(mixins.Text);
TextScalar.prototype.type = "text";
TextScalar.prototype.attrs = Object.keys(mixins.TextScalar);
TextVector.prototype.type = "text";
TextVector.prototype.attrs = Object.keys(mixins.TextVector);
//# sourceMappingURL=text.js.map