118 lines
3.1 KiB
Rust
118 lines
3.1 KiB
Rust
use std::marker::{PhantomData, Sized};
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use crate::prelude::*;
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use cosmic_text::{Attrs, Family, Metrics, Shaping};
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pub trait TextBuilderOutput: Sized {
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type Output;
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fn run(ui: &mut Ui, builder: TextBuilder<Self>) -> Self::Output;
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}
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pub struct TextBuilder<O = TextOutput> {
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pub content: String,
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pub attrs: TextAttrs,
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_pd: PhantomData<O>,
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}
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impl<O> TextBuilder<O> {
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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 * 1.1;
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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: Align) -> Self {
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self.attrs.align = align;
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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) -> TextBuilder<TextEditOutput> {
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TextBuilder {
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content: self.content,
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attrs: self.attrs,
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_pd: PhantomData,
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}
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}
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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(ui: &mut Ui, builder: TextBuilder<Self>) -> 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 font_system = &mut ui.data.text.font_system;
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buf.set_text(
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font_system,
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&builder.content,
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&Attrs::new(),
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Shaping::Advanced,
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);
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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),
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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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impl TextBuilderOutput for TextEditOutput {
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type Output = TextEdit;
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fn run(ui: &mut Ui, builder: TextBuilder<Self>) -> 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 {
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view: TextView::new(buf, builder.attrs),
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cursor: None,
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};
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let font_system = &mut ui.data.text.font_system;
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text.buf.set_text(
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font_system,
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&builder.content,
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&Attrs::new(),
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Shaping::Advanced,
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);
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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> FnOnce<(&mut Ui,)> for TextBuilder<O> {
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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 text(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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_pd: PhantomData,
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}
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}
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