auto-help which follows through the panes

Byron · Mar 29, 2020 · ac04d9e · ac04d9e
1 parent a3cf6d6
commit ac04d9e
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Showing 2 changed files with 45 additions and 3 deletions.
diff --git a/src/interactive/widgets/entries.rs b/src/interactive/widgets/entries.rs
@@ -12,7 +12,11 @@ use tui::{
     style::{Color, Modifier, Style},
     widgets::{Block, Borders, Text},
 };
-use tui_react::{fill_background_to_right, List, ListProps};
+use tui_react::{
+    draw_text_nowrap_fn, fill_background_to_right,
+    util::{block_width, rect},
+    List, ListProps,
+};
 
 pub struct EntriesProps<'a> {
     pub tree: &'a Tree,
@@ -155,5 +159,22 @@ impl Entries {
         );
 
         list.render(props, lines, area, buf);
+
+        if *is_focussed {
+            let help_text = " . = o|.. = u || ⇊ = CTRL+d|↓ = j|⇈ = CTRL+u|↑ = k ";
+            let help_text_block_width = block_width(help_text);
+            let bound = Rect {
+                width: area.width.saturating_sub(1),
+                ..area
+            };
+            if block_width(&title) + help_text_block_width <= bound.width {
+                draw_text_nowrap_fn(
+                    rect::snap_to_right(bound, help_text_block_width),
+                    buf,
+                    help_text,
+                    |_, _, _| Style::default(),
+                );
+            }
+        }
     }
 }
diff --git a/src/interactive/widgets/mark.rs b/src/interactive/widgets/mark.rs
@@ -18,7 +18,11 @@ use tui::{
     widgets::Text,
     widgets::{Paragraph, Widget},
 };
-use tui_react::{List, ListProps};
+use tui_react::{
+    draw_text_nowrap_fn,
+    util::{block_width, rect},
+    List, ListProps,
+};
 use unicode_segmentation::UnicodeSegmentation;
 
 pub enum MarkMode {
@@ -366,6 +370,23 @@ impl MarkPane {
             block: None,
             entry_in_view,
         };
-        self.list.render(props, entries, list_area, buf)
+        self.list.render(props, entries, list_area, buf);
+
+        if has_focus {
+            let help_text = " . = o|.. = u || ⇊ = CTRL+d|↓ = j|⇈ = CTRL+u|↑ = k ";
+            let help_text_block_width = block_width(help_text);
+            let bound = Rect {
+                width: area.width.saturating_sub(1),
+                ..area
+            };
+            if block_width(&title) + help_text_block_width <= bound.width {
+                draw_text_nowrap_fn(
+                    rect::snap_to_right(bound, help_text_block_width),
+                    buf,
+                    help_text,
+                    |_, _, _| Style::default(),
+                );
+            }
+        }
     }
 }