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Partially implement selection

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This commit is contained in:
Jeremy Soller 2022-10-21 09:49:16 -06:00
parent 1e4d951d74
commit 3ed1e938f5
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GPG key ID: 87F211AF2BE4C2FE
1 changed files with 49 additions and 34 deletions
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83
src/buffer.rs
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@ -645,7 +645,18 @@ impl<'a> TextBuffer<'a> {
return;
}
/*TODO
let cursor_glyph_opt = |cursor: &TextCursor| -> Option<usize> {
let mut glyph_i_opt = None;
for (glyph_i, glyph) in layout_line.glyphs.iter().enumerate() {
if cursor.start == glyph.start {
glyph_i_opt = Some(glyph_i);
} else if cursor.start == glyph.end {
glyph_i_opt = Some(glyph_i + 1);
}
}
glyph_i_opt
};
// Highlight selection (TODO: HIGHLIGHT COLOR!)
if let Some(select) = self.select_opt {
let (start, end) = if select.line < self.cursor.line {
@ -654,43 +665,43 @@ impl<'a> TextBuffer<'a> {
(self.cursor, select)
} else {
/* select.line == self.cursor.line */
if select.glyph < self.cursor.glyph {
if select.start < self.cursor.start {
(select, self.cursor)
} else {
/* select.glyph >= self.cursor.glyph */
/* select.start >= self.cursor.start */
(self.cursor, select)
}
};
if line_i_scrolled >= start.line && line_i_scrolled <= end.line {
let start_glyph = if start.line == line_i_scrolled {
start.glyph
if line_i >= start.line.get() && line_i <= end.line.get() {
let start_glyph = if start.line.get() == line_i {
cursor_glyph_opt(&start).unwrap_or(0)
} else {
0
};
let end_glyph = if end.line == line_i_scrolled {
end.glyph
let end_glyph = if end.line.get() == line_i {
cursor_glyph_opt(&end).unwrap_or(layout_line.glyphs.len() + 1)
} else {
line.glyphs.len() + 1
layout_line.glyphs.len() + 1
};
if end_glyph > start_glyph {
let (left_x, right_x) = if line.rtl {
let (left_x, right_x) = if shape.rtl {
(
line.glyphs.get(end_glyph - 1).map_or(0, |glyph| {
layout_line.glyphs.get(end_glyph - 1).map_or(0, |glyph| {
glyph.x as i32
}),
line.glyphs.get(start_glyph).map_or(self.width, |glyph| {
layout_line.glyphs.get(start_glyph).map_or(self.width, |glyph| {
(glyph.x + glyph.w) as i32
}),
)
} else {
(
line.glyphs.get(start_glyph).map_or(0, |glyph| {
layout_line.glyphs.get(start_glyph).map_or(0, |glyph| {
glyph.x as i32
}),
line.glyphs.get(end_glyph - 1).map_or(self.width, |glyph| {
layout_line.glyphs.get(end_glyph - 1).map_or(self.width, |glyph| {
(glyph.x + glyph.w) as i32
}),
)
@ -706,29 +717,33 @@ impl<'a> TextBuffer<'a> {
}
}
}
*/
// Draw cursor
if self.cursor.line.get() == line_i {
println!("FOUND CURSOR LINE {}", line_i);
let mut cursor_glyph_opt = None;
for (glyph_i, glyph) in layout_line.glyphs.iter().enumerate() {
if self.cursor.start == glyph.start {
cursor_glyph_opt = Some((glyph_i, false));
} else if self.cursor.start == glyph.end {
cursor_glyph_opt = Some((glyph_i, true));
}
}
if let Some((cursor_glyph, cursor_after)) = cursor_glyph_opt {
println!("FOUND CURSOR GLYPH {}, {}", cursor_glyph, cursor_after);
let glyph = &layout_line.glyphs[cursor_glyph];
let x = if shape.rtl != cursor_after {
(glyph.x + glyph.w) as i32
} else {
glyph.x as i32
if let Some(cursor_glyph) = cursor_glyph_opt(&self.cursor) {
let x = match layout_line.glyphs.get(cursor_glyph) {
Some(glyph) => {
// Start of detected glyph
if shape.rtl {
(glyph.x + glyph.w) as i32
} else {
glyph.x as i32
}
},
None => match layout_line.glyphs.last() {
Some(glyph) => {
// End of last glyph
if shape.rtl {
glyph.x as i32
} else {
(glyph.x + glyph.w) as i32
}
},
None => {
// Start of empty line
0
}
}
};
println!("x: {}", x);