Use pango for text layout
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parent
dc62753629
commit
673fef7c84
4 changed files with 88 additions and 18 deletions
53
Cargo.lock
generated
53
Cargo.lock
generated
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@ -909,6 +909,58 @@ version = "1.8.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
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[[package]]
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name = "pango"
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version = "0.14.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "546fd59801e5ca735af82839007edd226fe7d3bb06433ec48072be4439c28581"
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dependencies = [
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"bitflags",
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"glib",
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"libc",
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"once_cell",
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"pango-sys",
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]
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[[package]]
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name = "pango-sys"
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version = "0.14.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "2367099ca5e761546ba1d501955079f097caa186bb53ce0f718dca99ac1942fe"
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dependencies = [
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"glib-sys",
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"gobject-sys",
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"libc",
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"system-deps",
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]
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[[package]]
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name = "pangocairo"
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version = "0.14.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f03ac1e8d456f8f436168aeac41201f0bf49d1dc6c8d01bfb04de2cca25df631"
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dependencies = [
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"bitflags",
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"cairo-rs",
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"glib",
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"libc",
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"pango",
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"pangocairo-sys",
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]
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[[package]]
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name = "pangocairo-sys"
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version = "0.14.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f3b9b679ad5c8503e3e533ce06e1619d033274b246e977a6fa1655a6c6ef2b51"
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dependencies = [
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"cairo-sys-rs",
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"glib-sys",
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"libc",
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"pango-sys",
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"system-deps",
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]
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[[package]]
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name = "parking_lot"
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version = "0.11.2"
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@ -1099,6 +1151,7 @@ dependencies = [
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"log",
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"mlua",
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"nix 0.23.0",
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"pangocairo",
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"rayon",
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"walkdir",
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"winit",
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@ -13,6 +13,7 @@ rayon = "1.5.1"
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winit = {git="https://github.com/rust-windowing/winit"}
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cairo-rs = {version = "0.14.0", features = ["xcb"]}
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cairo-sys-rs = {version = "0.14.0", features = ["xcb"]}
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pangocairo = "0.14.0"
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xcb = "0.9.0"
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xcb-util = {version = "0.3.0", features = ["ewmh", "icccm"]}
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@ -64,7 +64,7 @@ impl<'a> Painter<'a> {
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ctx.fill().unwrap();
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// draw text
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ctx.move_to(x + 0.2, y + 0.8);
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ctx.move_to(x + 0.2, y+0.8);
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ctx.theme_text(&input, false, &[], &self.theme);
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}
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@ -1,8 +1,11 @@
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use log::debug;
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use pangocairo::pango::{self, AttrList, Attribute, FontDescription};
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// (r,g,b,a)
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#[derive(Clone, Copy)]
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pub struct Color(f64, f64, f64, f64);
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// (name, size)
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pub struct Font(String, f64);
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pub struct Font(String, i32);
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struct ColorScheme {
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base: Color,
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@ -44,7 +47,7 @@ impl Default for Theme {
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Theme {
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colors,
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font: Font("sans".into(), 17.0),
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font: Font("Sans Regular".into(), 13),
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border: 2.0,
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divider: 3.0
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@ -94,27 +97,40 @@ impl ThemedContextExt for cairo::Context {
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}
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fn theme_text(&self, text: &str, selected: bool, indices: &[usize], theme: &Theme) {
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self.save().unwrap();
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self.identity_matrix(); // this is extremely important otherwise pango
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// gets totally confused by active cairo transformations
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// which then messes with font size, size of attributes, etc
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let Color(r,g,b,a) = if selected { theme.colors.text_highlight }
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else { theme.colors.text };
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self.set_source_rgba(r,g,b,a);
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let font_size = self.device_to_user_point(theme.font.1);
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self.set_font_size(font_size);
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let layout = pangocairo::create_layout(self).unwrap();
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pangocairo::update_layout(self, &layout);
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for i in 0..text.len() {
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if indices.contains(&i) {
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self.select_font_face(&theme.font.0,
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cairo::FontSlant::Italic,
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cairo::FontWeight::Normal);
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} else {
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self.select_font_face(&theme.font.0,
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cairo::FontSlant::Normal,
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cairo::FontWeight::Normal);
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}
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self.show_text(&text[i..i+1])
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.expect("Could not draw themed text");
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let attrlist = AttrList::new();
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for i in indices {
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let (start, end) = ((*i as u32), (*i as u32)+1);
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let mut attr = Attribute::new_underline(pangocairo::pango::Underline::Single);
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attr.set_start_index(start);
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attr.set_end_index(end);
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attrlist.insert(attr);
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}
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layout.set_attributes(Some(&attrlist));
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let mut font = FontDescription::default();
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font.set_family(&theme.font.0);
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font.set_size(theme.font.1*pango::SCALE);
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layout.set_font_description(Some(&font));
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layout.set_text(text);
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let (_width,height) = layout.size();
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self.rel_move_to(0.0, -(height as f64)/(pango::SCALE as f64));
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pangocairo::show_layout(self, &layout);
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self.restore().unwrap();
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}
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fn device_to_user_point(&self, point: f64) -> f64 {
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