simpler, more mem efficient and probably faster selection

editor/src/error.rs

@@ -26,10 +26,6 @@ pub enum EdError {
     },
     #[snafu(display("MissingGlyphDims: glyph_dim_rect_opt was None for model. It needs to be set using the example_code_glyph_rect function."))]
     MissingGlyphDims {},
-    #[snafu(display("EmptyGlyphsPerLine: glyphs_per_line was none, it is necessary for highlighting of the code."))]
-    EmptyGlyphsPerLine {
-        backtrace: Backtrace,
-    },
 }
 
 pub type EdResult<T, E = EdError> = std::result::Result<T, E>;

editor/src/graphics/primitives/text.rs

@@ -3,13 +3,10 @@
 
 use super::rect::Rect;
 use crate::graphics::colors::CODE_COLOR;
-use crate::graphics::style::CODE_FONT_SIZE;
+use crate::graphics::style::{CODE_FONT_SIZE, CODE_TXT_XY};
 use ab_glyph::{FontArc, Glyph, InvalidFont};
 use cgmath::{Vector2, Vector4};
-use itertools::Itertools;
 use wgpu_glyph::{ab_glyph, GlyphBrush, GlyphBrushBuilder, GlyphCruncher, Section};
-use bumpalo::collections::Vec as BumpVec;
-use bumpalo::Bump;
 
 #[derive(Debug)]
 pub struct Text {
@@ -39,7 +36,7 @@ impl Default for Text {
 // necessary to get dimensions for caret
 pub fn example_code_glyph_rect(glyph_brush: &mut GlyphBrush<()>) -> Rect {
     let code_text = Text {
-        position: (30.0, 90.0).into(), //TODO 30.0 90.0 should be an arg
+        position: CODE_TXT_XY.into(),
         area_bounds: (std::f32::INFINITY, std::f32::INFINITY).into(),
         color: CODE_COLOR.into(),
         text: "a".to_owned(),
@@ -86,40 +83,12 @@ fn section_from_text(
 }
 
 // returns glyphs per line
-pub fn queue_text_draw<'a>(text: &Text, glyph_brush: &mut GlyphBrush<()>, arena: &'a Bump, selectable: bool) -> Option<BumpVec<'a, usize>> {
+pub fn queue_text_draw(text: &Text, glyph_brush: &mut GlyphBrush<()>) {
     let layout = layout_from_text(text);
 
     let section = section_from_text(text, layout);
 
     glyph_brush.queue(section.clone());
-
-    if selectable {
-        let mut glyphs_per_line: BumpVec<usize> = BumpVec::new_in(arena);
-
-        let glyph_section_iter = glyph_brush.glyphs_custom_layout(section, &layout);
-    
-        let first_glyph_opt = glyph_section_iter.next();
-    
-        if let Some(first_glyph) = first_glyph_opt {
-            let mut line_y_coord = first_glyph.glyph.scale.y;
-            let mut glyphs_on_line = 0;
-    
-            for glyph in glyph_section_iter {
-                let curr_y_coord = glyph.glyph.scale.y;
-                if curr_y_coord != line_y_coord {
-                    line_y_coord = curr_y_coord;
-                    glyphs_per_line.push(glyphs_on_line);
-                    glyphs_on_line = 0;
-                } else {
-                    glyphs_on_line += 1;
-                }
-            }
-        }
-    
-        Some(glyphs_per_line)
-    } else {
-        None
-    }
 }
 
 fn glyph_to_rect(glyph: &wgpu_glyph::SectionGlyph) -> Rect {
@@ -144,7 +113,7 @@ pub fn glyph_top_y(glyph: &Glyph) -> f32 {
 }
 
 pub fn glyph_width(glyph: &Glyph) -> f32 {
-    glyph.scale.x * 0.5
+    glyph.scale.x * 0.4765
 }
 
 pub fn build_glyph_brush(

editor/src/graphics/style.rs

@@ -1 +1,2 @@
 pub const CODE_FONT_SIZE: f32 = 40.0;
+pub const CODE_TXT_XY: (f32, f32) = (30.0, 90.0);

editor/src/lib.rs

@@ -13,8 +13,7 @@ extern crate pest;
 #[macro_use]
 extern crate pest_derive;
 
-use crate::error::EdError::{MissingGlyphDims};
-use crate::error::{EmptyGlyphsPerLine};
+use crate::error::EdError::MissingGlyphDims;
 use crate::error::{print_err, EdResult};
 use crate::graphics::colors::{CARET_COLOR, CODE_COLOR, TXT_COLOR};
 use crate::graphics::lowlevel::buffer::create_rect_buffers;
@@ -25,12 +24,13 @@ use crate::graphics::primitives::text::{
     build_glyph_brush, example_code_glyph_rect, queue_text_draw, Text,
 };
 use crate::graphics::style::CODE_FONT_SIZE;
+use crate::graphics::style::CODE_TXT_XY;
 use crate::selection::create_selection_rects;
 use crate::tea::ed_model::EdModel;
 use crate::tea::{ed_model, update};
-use crate::vec_result::get_res;
 use bumpalo::collections::Vec as BumpVec;
 use bumpalo::Bump;
+use cgmath::Vector2;
 use ed_model::Position;
 use pipelines::RectResources;
 use std::error::Error;
@@ -42,7 +42,6 @@ use winit::dpi::PhysicalSize;
 use winit::event;
 use winit::event::{Event, ModifiersState};
 use winit::event_loop::ControlFlow;
-use snafu::ensure;
 
 pub mod error;
 pub mod graphics;
@@ -217,12 +216,17 @@ fn run_event_loop() -> Result<(), Box<dyn Error>> {
                     .expect("Failed to acquire next SwapChainFrame")
                     .output;
 
-                let glyph_bounds_rects =
-                    queue_all_text(&size, &ed_model.lines, ed_model.caret_pos, &mut glyph_brush, &arena);
+                queue_all_text(
+                    &size,
+                    &ed_model.lines,
+                    ed_model.caret_pos,
+                    CODE_TXT_XY.into(),
+                    &mut glyph_brush,
+                );
 
                 match draw_all_rects(
                     &ed_model,
-                    &glyph_bounds_rects,
+                    &ed_model.glyph_dim_rect_opt,
                     &arena,
                     &mut encoder,
                     &frame.view,
@@ -269,7 +273,7 @@ fn run_event_loop() -> Result<(), Box<dyn Error>> {
 
 fn draw_all_rects(
     ed_model: &EdModel,
-    glyph_bounds_rects: &[Vec<Rect>],
+    glyph_dim_rect_opt: &Option<Rect>,
     arena: &Bump,
     encoder: &mut CommandEncoder,
     texture_view: &TextureView,
@@ -278,17 +282,20 @@ fn draw_all_rects(
 ) -> EdResult<()> {
     let mut all_rects: BumpVec<Rect> = BumpVec::new_in(arena);
 
+    let glyph_rect = if let Some(glyph_dim_rect) = glyph_dim_rect_opt {
+        glyph_dim_rect
+    } else {
+        return Err(MissingGlyphDims {});
+    };
+
     if let Some(selection) = ed_model.selection_opt {
-        let mut selection_rects = create_selection_rects(selection, glyph_bounds_rects, &arena)?;
+        let mut selection_rects =
+            create_selection_rects(selection, &ed_model.lines, glyph_rect, &arena)?;
 
         all_rects.append(&mut selection_rects);
     }
 
-    all_rects.push(make_caret_rect(
-        ed_model.caret_pos,
-        glyph_bounds_rects,
-        ed_model.glyph_dim_rect_opt,
-    )?);
+    all_rects.push(make_caret_rect(ed_model.caret_pos, glyph_rect)?);
 
     let rect_buffers = create_rect_buffers(gpu_device, encoder, &all_rects);
 
@@ -325,50 +332,29 @@ fn begin_render_pass<'a>(
     })
 }
 
-fn make_caret_rect(
-    caret_pos: Position,
-    glyph_bound_rects: &[Vec<Rect>],
-    glyph_dim_rect_opt: Option<Rect>,
-) -> EdResult<Rect> {
-    let mut glyph_rect = if let Some(glyph_dim_rect) = glyph_dim_rect_opt {
-        glyph_dim_rect
-    } else {
-        return Err(MissingGlyphDims{});
-    };
+fn make_caret_rect(caret_pos: Position, glyph_dim_rect: &Rect) -> EdResult<Rect> {
+    let caret_y =
+        glyph_dim_rect.top_left_coords.y + (caret_pos.line as f32) * glyph_dim_rect.height;
 
-    let caret_y = glyph_rect.top_left_coords.y + (caret_pos.line as f32) * glyph_rect.height;
-
-    if caret_pos.column > 0 && glyph_bound_rects.len() > caret_pos.line {
-        let indx = caret_pos.column - 1;
-        let glyph_rect_line = get_res(caret_pos.line, glyph_bound_rects)?;
-
-        if glyph_rect_line.len() > indx {
-            glyph_rect = *get_res(indx, glyph_rect_line)?;
-        }
-    };
-
-    let caret_x = if caret_pos.column == 0 {
-        glyph_rect.top_left_coords.x
-    } else {
-        glyph_rect.top_left_coords.x + glyph_rect.width
-    };
+    let caret_x =
+        glyph_dim_rect.top_left_coords.x + glyph_dim_rect.width * (caret_pos.column as f32);
 
     Ok(Rect {
         top_left_coords: (caret_x, caret_y).into(),
-        height: glyph_rect.height,
-        width: 3.0,
+        height: glyph_dim_rect.height,
+        width: 2.0,
         color: CARET_COLOR,
     })
 }
 
 // returns bounding boxes for every glyph
-fn queue_all_text<'a>(
+fn queue_all_text(
     size: &PhysicalSize<u32>,
     lines: &[String],
     caret_pos: Position,
+    code_coords: Vector2<f32>,
     glyph_brush: &mut GlyphBrush<()>,
-    arena: &'a Bump
-) -> EdResult<BumpVec<'a, usize>> {
+) {
     let area_bounds = (size.width as f32, size.height as f32).into();
 
     let main_label = Text {
@@ -381,7 +367,7 @@ fn queue_all_text<'a>(
     };
 
     let code_text = Text {
-        position: (30.0, 90.0).into(), //TODO 30 90 should be an arg
+        position: code_coords,
         area_bounds,
         color: CODE_COLOR.into(),
         text: lines.join(""),
@@ -390,7 +376,7 @@ fn queue_all_text<'a>(
     };
 
     let caret_pos_label = Text {
-        position: (30.0, 530.0).into(),
+        position: (30.0, (size.height as f32) - 45.0).into(),
         area_bounds,
         color: TXT_COLOR.into(),
         text: format!("Ln {}, Col {}", caret_pos.line, caret_pos.column),
@@ -398,11 +384,9 @@ fn queue_all_text<'a>(
         ..Default::default()
     };
 
-    queue_text_draw(&main_label, glyph_brush, arena, false);
+    queue_text_draw(&main_label, glyph_brush);
 
-    queue_text_draw(&caret_pos_label, glyph_brush, arena, false);
+    queue_text_draw(&caret_pos_label, glyph_brush);
 
-    let glyphs_per_line_opt = queue_text_draw(&code_text, glyph_brush, arena, true);
-
-    ensure!(glyphs_per_line_opt.is_some(), EmptyGlyphsPerLine{})
+    queue_text_draw(&code_text, glyph_brush);
 }

editor/src/selection.rs

@@ -43,7 +43,8 @@ fn validate_selection(selection: RawSelection) -> EdResult<ValidSelection> {
 
 pub fn create_selection_rects<'a>(
     raw_sel: RawSelection,
-    glyph_bound_rects: &[Vec<Rect>],
+    lines: &[String],
+    glyph_dim_rect: &Rect,
     arena: &'a Bump,
 ) -> EdResult<BumpVec<'a, Rect>> {
     let valid_sel = validate_selection(raw_sel)?;
@@ -51,25 +52,17 @@ pub fn create_selection_rects<'a>(
 
     let mut all_rects: BumpVec<Rect> = BumpVec::new_in(arena);
 
+    let height = glyph_dim_rect.height;
+    let start_y = glyph_dim_rect.top_left_coords.y + height * (start_pos.line as f32);
+    let line_start_x = glyph_dim_rect.top_left_coords.x;
+
     if start_pos.line == end_pos.line {
-        let start_glyph_rect = get_res(
-            start_pos.column,
-            get_res(start_pos.line, glyph_bound_rects)?,
-        )?;
-
-        let stop_glyph_rect = get_res(
-            end_pos.column - 1,
-            get_res(end_pos.line, glyph_bound_rects)?,
-        )?;
-
-        let top_left_coords = start_glyph_rect.top_left_coords;
-
-        let height = start_glyph_rect.height;
-        let width = (stop_glyph_rect.top_left_coords.x - start_glyph_rect.top_left_coords.x)
-            + stop_glyph_rect.width;
+        let width = ((end_pos.column as f32) * glyph_dim_rect.width)
+            - ((start_pos.column as f32) * glyph_dim_rect.width);
+        let sel_rect_x = line_start_x + ((start_pos.column as f32) * glyph_dim_rect.width);
 
         all_rects.push(Rect {
-            top_left_coords,
+            top_left_coords: (sel_rect_x, start_y).into(),
             width,
             height,
             color: colors::SELECT_COLOR,
@@ -78,21 +71,14 @@ pub fn create_selection_rects<'a>(
         Ok(all_rects)
     } else {
         // first line
-        let start_line = get_res(start_pos.line, glyph_bound_rects)?;
+        let end_col = get_res(start_pos.line, lines)?.len();
+        let width = ((end_col as f32) * glyph_dim_rect.width)
+            - ((start_pos.column as f32) * glyph_dim_rect.width);
 
-        let start_glyph_rect = get_res(start_pos.column, start_line)?;
-
-        let start_line_last_glyph_rect = get_res(start_line.len() - 1, start_line)?;
-
-        let top_left_coords = start_glyph_rect.top_left_coords;
-
-        let height = start_glyph_rect.height;
-        let width = (start_line_last_glyph_rect.top_left_coords.x
-            - start_glyph_rect.top_left_coords.x)
-            + start_line_last_glyph_rect.width;
+        let sel_rect_x = line_start_x + ((start_pos.column as f32) * glyph_dim_rect.width);
 
         all_rects.push(Rect {
-            top_left_coords,
+            top_left_coords: (sel_rect_x, start_y).into(),
             width,
             height,
             color: colors::SELECT_COLOR,
@@ -103,21 +89,14 @@ pub fn create_selection_rects<'a>(
         let first_mid_line = start_pos.line + 1;
 
         for i in first_mid_line..(first_mid_line + nr_mid_lines) {
-            let mid_line = get_res(i, glyph_bound_rects)?;
+            let mid_line_len = get_res(i, lines)?.len();
 
-            let mid_line_first_glyph_rect = get_res(0, mid_line)?;
+            let width = (mid_line_len as f32) * glyph_dim_rect.width;
 
-            let mid_line_last_glyph_rect = get_res(mid_line.len() - 1, mid_line)?;
-
-            let top_left_coords = mid_line_first_glyph_rect.top_left_coords;
-
-            let height = mid_line_first_glyph_rect.height;
-            let width = (mid_line_last_glyph_rect.top_left_coords.x
-                - mid_line_first_glyph_rect.top_left_coords.x)
-                + mid_line_last_glyph_rect.width;
+            let sel_rect_y = start_y + ((i - start_pos.line) as f32) * glyph_dim_rect.height;
 
             all_rects.push(Rect {
-                top_left_coords,
+                top_left_coords: (line_start_x, sel_rect_y).into(),
                 width,
                 height,
                 color: colors::SELECT_COLOR,
@@ -126,21 +105,13 @@ pub fn create_selection_rects<'a>(
 
         //last line
         if end_pos.column > 0 {
-            let stop_line = get_res(end_pos.line, glyph_bound_rects)?;
+            let sel_rect_y =
+                start_y + ((end_pos.line - start_pos.line) as f32) * glyph_dim_rect.height;
 
-            let stop_line_first_glyph_rect = get_res(0, stop_line)?;
-
-            let stop_glyph_rect = get_res(end_pos.column - 1, stop_line)?;
-
-            let top_left_coords = stop_line_first_glyph_rect.top_left_coords;
-
-            let height = stop_glyph_rect.height;
-            let width = (stop_glyph_rect.top_left_coords.x
-                - stop_line_first_glyph_rect.top_left_coords.x)
-                + stop_glyph_rect.width;
+            let width = (end_pos.column as f32) * glyph_dim_rect.width;
 
             all_rects.push(Rect {
-                top_left_coords,
+                top_left_coords: (line_start_x, sel_rect_y).into(),
                 width,
                 height,
                 color: colors::SELECT_COLOR,