Add alignment parameter to set_text (#419)

* add alignment parameter to set_text

* Fix doc comment

benches/layout.rs

@@ -26,7 +26,7 @@ fn layout(c: &mut Criterion) {
 
             let mut run_on_text = |text: &str| {
                 buffer.lines.clear();
-                buffer.set_text(&mut fs, text, &ct::Attrs::new(), *shape);
+                buffer.set_text(&mut fs, text, &ct::Attrs::new(), *shape, None);
                 buffer.shape_until_scroll(&mut fs, false);
             };
 

benches/text_shaping_benchmarks.rs

@@ -16,6 +16,7 @@ fn bench_ascii_fast_path(c: &mut Criterion) {
                 black_box(&ascii_text),
                 &ct::Attrs::new(),
                 ct::Shaping::Advanced,
+                None,
             );
             buffer.shape_until_scroll(&mut fs, false);
         });
@@ -36,6 +37,7 @@ fn bench_bidi_processing(c: &mut Criterion) {
                 black_box(&bidi_text),
                 &ct::Attrs::new(),
                 ct::Shaping::Advanced,
+                None,
             );
             buffer.shape_until_scroll(&mut fs, false);
         });
@@ -56,6 +58,7 @@ fn bench_layout_heavy(c: &mut Criterion) {
                 black_box(&layout_text),
                 &ct::Attrs::new(),
                 ct::Shaping::Advanced,
+                None,
             );
             buffer.shape_until_scroll(&mut fs, false);
         });
@@ -81,6 +84,7 @@ fn bench_combined_stress(c: &mut Criterion) {
                 black_box(&stress_text),
                 &ct::Attrs::new(),
                 ct::Shaping::Advanced,
+                None,
             );
             buffer.shape_until_scroll(&mut fs, false);
         });

examples/multiview/src/main.rs

@@ -31,7 +31,7 @@ fn main() {
 
     let attrs = Attrs::new().family(Family::Monospace);
     match fs::read_to_string(&path) {
-        Ok(text) => buffer.set_text(&text, &attrs, Shaping::Advanced),
+        Ok(text) => buffer.set_text(&text, &attrs, Shaping::Advanced, None),
         Err(err) => {
             log::error!("failed to load {:?}: {}", path, err);
         }

examples/terminal/src/main.rs

@@ -36,7 +36,7 @@ fn main() {
     let text = std::env::args()
         .nth(1)
         .unwrap_or(" Hi, Rust! 🦀 ".to_string());
-    buffer.set_text(&text, &attrs, Shaping::Advanced);
+    buffer.set_text(&text, &attrs, Shaping::Advanced, None);
 
     // Perform shaping as desired
     buffer.shape_until_scroll(true);

src/buffer.rs

@@ -271,7 +271,7 @@ impl Buffer {
     /// Will panic if `metrics.line_height` is zero.
     pub fn new(font_system: &mut FontSystem, metrics: Metrics) -> Self {
         let mut buffer = Self::new_empty(metrics);
-        buffer.set_text(font_system, "", &Attrs::new(), Shaping::Advanced);
+        buffer.set_text(font_system, "", &Attrs::new(), Shaping::Advanced, None);
         buffer
     }
 
@@ -679,6 +679,7 @@ impl Buffer {
         text: &str,
         attrs: &Attrs,
         shaping: Shaping,
+        alignment: Option<Align>,
     ) {
         self.lines.clear();
         for (range, ending) in LineIter::new(text) {
@@ -697,6 +698,13 @@ impl Buffer {
                 shaping,
             ));
         }
+
+        if alignment.is_some() {
+            self.lines.iter_mut().for_each(|line| {
+                line.set_align(alignment);
+            });
+        }
+
         self.scroll = Scroll::default();
         self.shape_until_scroll(font_system, false);
     }
@@ -1424,8 +1432,15 @@ impl BorrowedWithFontSystem<'_, Buffer> {
     }
 
     /// Set text of buffer, using provided attributes for each line by default
-    pub fn set_text(&mut self, text: &str, attrs: &Attrs, shaping: Shaping) {
-        self.inner.set_text(self.font_system, text, attrs, shaping);
+    pub fn set_text(
+        &mut self,
+        text: &str,
+        attrs: &Attrs,
+        shaping: Shaping,
+        alignment: Option<Align>,
+    ) {
+        self.inner
+            .set_text(self.font_system, text, attrs, shaping, alignment);
     }
 
     /// Set text of buffer, using an iterator of styled spans (pairs of text and attributes)

src/edit/syntect.rs

@@ -125,7 +125,7 @@ impl<'syntax_system, 'buffer> SyntaxEditor<'syntax_system, 'buffer> {
 
         let text = fs::read_to_string(path)?;
         self.editor.with_buffer_mut(|buffer| {
-            buffer.set_text(font_system, &text, &attrs, Shaping::Advanced);
+            buffer.set_text(font_system, &text, &attrs, Shaping::Advanced, None);
         });
 
         //TODO: re-use text

src/lib.rs

@@ -36,7 +36,7 @@
 //! let attrs = Attrs::new();
 //!
 //! // Add some text!
-//! buffer.set_text("Hello, Rust! 🦀\n", &attrs, Shaping::Advanced);
+//! buffer.set_text("Hello, Rust! 🦀\n", &attrs, Shaping::Advanced, None);
 //!
 //! // Perform shaping as desired
 //! buffer.shape_until_scroll(true);

tests/common/mod.rs

@@ -92,7 +92,7 @@ impl DrawTestCfg {
             Some((self.canvas_width - margins * 2) as f32),
             Some((self.canvas_height - margins * 2) as f32),
         );
-        buffer.set_text(&self.text, &self.font.as_attrs(), Shaping::Advanced);
+        buffer.set_text(&self.text, &self.font.as_attrs(), Shaping::Advanced, None);
         buffer.shape_until_scroll(true);
 
         // Black

tests/wrap_stability.rs

@@ -105,7 +105,7 @@ fn wrap_extra_line() {
 
     // Add some text!
     buffer.set_wrap(Wrap::Word);
-    buffer.set_text("Lorem ipsum dolor sit amet, qui minim labore adipisicing\n\nweeewoooo minim sint cillum sint consectetur cupidatat.", &Attrs::new().family(cosmic_text::Family::Name("Inter")), Shaping::Advanced);
+    buffer.set_text("Lorem ipsum dolor sit amet, qui minim labore adipisicing\n\nweeewoooo minim sint cillum sint consectetur cupidatat.", &Attrs::new().family(cosmic_text::Family::Name("Inter")), Shaping::Advanced, None);
 
     // Set a size for the text buffer, in pixels
     buffer.set_size(Some(50.0), Some(1000.0));

tests/wrap_word_fallback.rs

@@ -15,7 +15,7 @@ fn wrap_word_fallback() {
     let mut buffer = buffer.borrow_with(&mut font_system);
 
     buffer.set_wrap(Wrap::WordOrGlyph);
-    buffer.set_text("Lorem ipsum dolor sit amet, qui minim labore adipisicing minim sint cillum sint consectetur cupidatat.", &Attrs::new().family(cosmic_text::Family::Name("Inter")), Shaping::Advanced);
+    buffer.set_text("Lorem ipsum dolor sit amet, qui minim labore adipisicing minim sint cillum sint consectetur cupidatat.", &Attrs::new().family(cosmic_text::Family::Name("Inter")), Shaping::Advanced, None);
     buffer.set_size(Some(50.0), Some(1000.0));
 
     buffer.shape_until_scroll(false);