Refactor editor scrolling and implement scroll commands from vim mode

2022-12-07 16:39:32 -08:00
parent 1920de81d9
commit cffb064c16
29 changed files with 1244 additions and 683 deletions
@@ -0,0 +1,48 @@
+use gpui::ViewContext;
+use serde::Deserialize;
+use util::iife;
+
+use crate::Editor;
+
+#[derive(Clone, PartialEq, Deserialize)]
+pub enum ScrollAmount {
+    LineUp,
+    LineDown,
+    HalfPageUp,
+    HalfPageDown,
+    PageUp,
+    PageDown,
+}
+
+impl ScrollAmount {
+    pub fn move_context_menu_selection(
+        &self,
+        editor: &mut Editor,
+        cx: &mut ViewContext<Editor>,
+    ) -> bool {
+        iife!({
+            let context_menu = editor.context_menu.as_mut()?;
+
+            match self {
+                Self::LineDown | Self::HalfPageDown => context_menu.select_next(cx),
+                Self::LineUp | Self::HalfPageUp => context_menu.select_prev(cx),
+                Self::PageDown => context_menu.select_last(cx),
+                Self::PageUp => context_menu.select_first(cx),
+            }
+            .then_some(())
+        })
+        .is_some()
+    }
+
+    pub fn lines(&self, editor: &mut Editor) -> f32 {
+        match self {
+            Self::LineDown => 1.,
+            Self::LineUp => -1.,
+            Self::HalfPageDown => editor.visible_line_count().map(|l| l / 2.).unwrap_or(1.),
+            Self::HalfPageUp => -editor.visible_line_count().map(|l| l / 2.).unwrap_or(1.),
+            // Minus 1. here so that there is a pivot line that stays on the screen
+            Self::PageDown => editor.visible_line_count().unwrap_or(1.) - 1.,
+            Self::PageUp => -editor.visible_line_count().unwrap_or(1.) - 1.,
+        }
+    }
+}