129 lines
3.8 KiB
Rust
129 lines
3.8 KiB
Rust
use crate::prelude::*;
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use cosmic_text::{Attrs, Family, Metrics};
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use std::marker::Sized;
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pub struct TextBuilder<O = TextOutput, H: WidgetOption = ()> {
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pub content: String,
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pub attrs: TextAttrs,
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pub hint: H,
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pub output: O,
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}
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impl<O, H: WidgetOption> TextBuilder<O, H> {
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pub fn size(mut self, size: impl UiNum) -> Self {
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self.attrs.font_size = size.to_f32();
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self.attrs.line_height = self.attrs.font_size * LINE_HEIGHT_MULT;
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self
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}
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pub fn color(mut self, color: UiColor) -> Self {
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self.attrs.color = color;
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self
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}
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pub fn family(mut self, family: Family<'static>) -> Self {
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self.attrs.family = family;
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self
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}
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pub fn line_height(mut self, height: f32) -> Self {
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self.attrs.line_height = height;
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self
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}
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pub fn text_align(mut self, align: impl Into<RegionAlign>) -> Self {
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self.attrs.align = align.into();
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self
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}
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pub fn center_text(mut self) -> Self {
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self.attrs.align = Align::CENTER;
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self
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}
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pub fn wrap(mut self, wrap: bool) -> Self {
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self.attrs.wrap = wrap;
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self
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}
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pub fn editable(self, single_line: bool) -> TextBuilder<TextEditOutput, H> {
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TextBuilder {
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content: self.content,
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attrs: self.attrs,
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hint: self.hint,
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output: TextEditOutput { single_line },
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}
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}
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}
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impl<O> TextBuilder<O> {
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pub fn hint<W: WidgetLike<Tag>, Tag>(self, hint: W) -> TextBuilder<O, impl WidgetOption> {
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TextBuilder {
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content: self.content,
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attrs: self.attrs,
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hint: move |ui: &mut Ui| Some(hint.add(ui).any()),
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output: self.output,
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}
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}
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}
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pub trait TextBuilderOutput: Sized {
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type Output;
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fn run<H: WidgetOption>(ui: &mut Ui, builder: TextBuilder<Self, H>) -> Self::Output;
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}
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pub struct TextOutput;
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impl TextBuilderOutput for TextOutput {
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type Output = Text;
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fn run<H: WidgetOption>(ui: &mut Ui, builder: TextBuilder<Self, H>) -> Self::Output {
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let mut buf = TextBuffer::new_empty(Metrics::new(
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builder.attrs.font_size,
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builder.attrs.line_height,
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));
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let hint = builder.hint.get(ui);
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let font_system = &mut ui.data.text.font_system;
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buf.set_text(font_system, &builder.content, &Attrs::new(), SHAPING, None);
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let mut text = Text {
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content: builder.content.into(),
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view: TextView::new(buf, builder.attrs, hint),
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};
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text.content.changed = false;
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builder.attrs.apply(font_system, &mut text.view.buf, None);
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text
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}
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}
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pub struct TextEditOutput {
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single_line: bool,
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}
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impl TextBuilderOutput for TextEditOutput {
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type Output = TextEdit;
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fn run<H: WidgetOption>(ui: &mut Ui, builder: TextBuilder<Self, H>) -> Self::Output {
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let buf = TextBuffer::new_empty(Metrics::new(
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builder.attrs.font_size,
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builder.attrs.line_height,
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));
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let mut text = TextEdit::new(
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TextView::new(buf, builder.attrs, builder.hint.get(ui)),
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builder.output.single_line,
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);
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let font_system = &mut ui.data.text.font_system;
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text.buf
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.set_text(font_system, &builder.content, &Attrs::new(), SHAPING, None);
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builder.attrs.apply(font_system, &mut text.buf, None);
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text
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}
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}
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impl<O: TextBuilderOutput, H: WidgetOption> FnOnce<(&mut Ui,)> for TextBuilder<O, H> {
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type Output = O::Output;
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extern "rust-call" fn call_once(self, args: (&mut Ui,)) -> Self::Output {
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O::run(args.0, self)
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}
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}
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pub fn wtext(content: impl Into<String>) -> TextBuilder {
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TextBuilder {
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content: content.into(),
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attrs: TextAttrs::default(),
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hint: (),
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output: TextOutput,
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}
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}
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