Add word break copy area function

closes #13

2 files changed, 25 insertions, 2 deletions

diff --git a/ui/src/components/mod.rs b/ui/src/components/mod.rs
index 5b921846..b7bb6b4a 100644
--- a/ui/src/components/mod.rs
+++ b/ui/src/components/mod.rs
@@ -84,11 +84,34 @@ pub trait Component {
     }
 }
 
-pub fn copy_area_with_break(grid_dest: &mut CellBuffer, grid_src: &CellBuffer, dest: Area, src: Area) {
 
+// TODO: word break.
+pub fn copy_area_with_break(grid_dest: &mut CellBuffer, grid_src: &CellBuffer, dest: Area, src: Area) {
+    if !is_valid_area!(dest) || !is_valid_area!(src) {
+        eprintln!("BUG: Invalid areas in copy_area:\n src: {:?}\n dest: {:?}", src, dest);
+        return;
+    }
+    let mut src_x = get_x(upper_left!(src));
+    let mut src_y = get_y(upper_left!(src));
 
+    'y_: for y in get_y(upper_left!(dest))..=get_y(bottom_right!(dest)) {
+        'x_: for x in get_x(upper_left!(dest))..=get_x(bottom_right!(dest)) {
+            grid_dest[(x,y)] = grid_src[(src_x, src_y)];
+            if src_x == get_x(bottom_right!(src)) {
+                src_y += 1;
+                src_x = 0;
+                if src_y == get_y(bottom_right!(src)) {
+                    //clear_area(grid_dest, ((get_x(upper_left!(dest)), y), bottom_right!(dest)));
+                    break 'y_;
+                }
+                break 'x_;
+            }
+            src_x += 1;
+        }
+    }
 }
 
+
 /// Copy a source `Area` to a destination.
 pub fn copy_area(grid_dest: &mut CellBuffer, grid_src: &CellBuffer, dest: Area, src: Area) {
     if !is_valid_area!(dest) || !is_valid_area!(src) {
diff --git a/ui/src/components/utilities.rs b/ui/src/components/utilities.rs
index 264ece73..70a23b50 100644
--- a/ui/src/components/utilities.rs
+++ b/ui/src/components/utilities.rs
@@ -257,7 +257,7 @@ impl Component for Pager {
         //let pager_stop: bool = context.settings.pager.pager_stop;
         //let rows = y(bottom_right) - y(upper_left);
         //let page_length = rows / self.height;
-        copy_area(grid, &self.content, area, ((0, self.cursor_pos), (self.width - 1, self.height - 1))); 
+        copy_area_with_break(grid, &self.content, area, ((0, self.cursor_pos), (self.width - 1, self.height - 1))); 
         context.dirty_areas.push_back(area);
     }
     fn process_event(&mut self, event: &UIEvent, _context: &mut Context) {