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|
use crate::config::Config;
use crate::i3bar_protocol::{Block, MinWidth};
use crate::text::{self, ComputedText};
#[derive(Default)]
pub struct BlocksCache {
computed: Vec<ComputedBlock>,
}
pub struct ComputedBlock {
pub block: Block,
pub full: ComputedText,
pub short: Option<ComputedText>,
pub min_width: Option<f64>,
}
impl BlocksCache {
pub fn process_new_blocks(&mut self, config: &Config, blocks: Vec<Block>) {
if blocks.len() != self.computed.len() {
self.computed.clear();
self.computed.reserve(blocks.len());
self.computed
.extend(blocks.into_iter().map(|b| ComputedBlock::new(b, config)));
return;
}
for (block, computed) in blocks.into_iter().zip(self.computed.iter_mut()) {
computed.update(block, config);
}
}
pub fn get_computed(&self) -> &[ComputedBlock] {
&self.computed
}
pub fn config_changed(&mut self, config: &Config) {
let blocks = self
.computed
.drain(..)
.map(|computed| computed.block)
.collect();
self.process_new_blocks(config, blocks);
}
}
impl ComputedBlock {
fn new(block: Block, config: &Config) -> Self {
let mw = comp_min_width(&block, config);
Self {
full: comp_full(&block, mw, config),
short: comp_short(&block, mw, config),
min_width: mw,
block,
}
}
fn update(&mut self, block: Block, config: &Config) {
if block.min_width != self.block.min_width || block.markup != self.block.markup {
*self = ComputedBlock::new(block, config);
} else {
if block.full_text != self.block.full_text {
self.full = comp_full(&block, self.min_width, config);
}
if block.short_text != self.block.short_text {
self.short = comp_short(&block, self.min_width, config);
}
self.block = block;
}
}
}
fn comp_min_width(block: &Block, config: &Config) -> Option<f64> {
let markup = block.markup.as_deref() == Some("pango");
match &block.min_width {
Some(MinWidth::Pixels(p)) => Some(*p as f64),
Some(MinWidth::Text(t)) => Some(text::width_of(t, markup, &config.font.0)),
None => None,
}
}
fn comp_full(block: &Block, min_width: Option<f64>, config: &Config) -> ComputedText {
let markup = block.markup.as_deref() == Some("pango");
ComputedText::new(
&block.full_text,
text::Attributes {
font: &config.font,
padding_left: 0.0,
padding_right: 0.0,
min_width,
align: block.align,
markup,
},
)
}
fn comp_short(block: &Block, min_width: Option<f64>, config: &Config) -> Option<ComputedText> {
let markup = block.markup.as_deref() == Some("pango");
block.short_text.as_ref().map(|short_text| {
text::ComputedText::new(
short_text,
text::Attributes {
font: &config.font,
padding_left: 0.0,
padding_right: 0.0,
min_width,
align: block.align,
markup,
},
)
})
}
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