fix(compatibility): fish multiline paste (#112)

* fix(compatibility): fix fish multiline paste

* fix(tests): adjust snapshots of test to tabs

* style(formatting): make rustfmt happy

6 files changed, 139 insertions, 9 deletions

diff --git a/src/terminal_pane/scroll.rs b/src/terminal_pane/scroll.rs
index f86cf5f8..20f98da0 100644
--- a/src/terminal_pane/scroll.rs
+++ b/src/terminal_pane/scroll.rs
@@ -284,14 +284,6 @@ impl CursorPosition {
         self.column_index = 0;
         self.line_index.1 = 0;
     }
-    pub fn move_up_by_canonical_lines(&mut self, count: usize) {
-        let current_canonical_line_position = self.line_index.0;
-        if count > current_canonical_line_position {
-            self.line_index = (0, 0);
-        } else {
-            self.line_index = (current_canonical_line_position - count, 0);
-        }
-    }
     pub fn move_down_by_canonical_lines(&mut self, count: usize) {
         // this method does not verify that we will not overflow
         let current_canonical_line_position = self.line_index.0;
@@ -508,7 +500,24 @@ impl Scroll {
         self.cursor_position.move_backwards(count);
     }
     pub fn move_cursor_up(&mut self, count: usize) {
-        self.cursor_position.move_up_by_canonical_lines(count);
+        for _ in 0..count {
+            let (current_canonical_line_index, current_line_wrap_index) =
+                self.cursor_position.line_index;
+            if current_line_wrap_index > 0 {
+                // go up one line-wrap
+                self.cursor_position.line_index.1 -= 1;
+            } else if current_canonical_line_index > 0 {
+                // go up to previous canonical line
+                self.cursor_position.line_index.0 -= 1;
+                let current_canonical_line = self
+                    .canonical_lines
+                    .get(self.cursor_position.line_index.0)
+                    .unwrap();
+                let wraps_in_current_line = current_canonical_line.wrapped_fragments.len();
+                // make sure to only go up to the last wrap of the previous line
+                self.cursor_position.line_index.1 = wraps_in_current_line - 1;
+            }
+        }
     }
     pub fn move_cursor_down(&mut self, count: usize) {
         let current_canonical_line = self.cursor_position.line_index.0;
diff --git a/src/tests/fixtures/fish_paste_multiline b/src/tests/fixtures/fish_paste_multiline
new file mode 100644
index 00000000..f41187f6
--- /dev/null
+++ b/src/tests/fixtures/fish_paste_multiline
diff --git a/src/tests/integration/compatibility.rs b/src/tests/integration/compatibility.rs
index 65dc8da9..578e8fd2 100644
--- a/src/tests/integration/compatibility.rs
+++ b/src/tests/integration/compatibility.rs
@@ -388,3 +388,28 @@ pub fn bash_cursor_linewrap() {
         assert_snapshot!(snapshot);
     }
 }
+
+#[test]
+pub fn fish_paste_multiline() {
+    // here we paste a multiline command in fish shell, making sure we support it
+    // going up and changing the colors of our line-wrapped pasted text
+    let fake_win_size = PositionAndSize {
+        columns: 149,
+        rows: 28,
+        x: 0,
+        y: 0,
+    };
+    let fixture_name = "fish_paste_multiline";
+    let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
+    fake_input_output.add_terminal_input(&[&COMMAND_TOGGLE, &COMMAND_TOGGLE, &QUIT]);
+    start(Box::new(fake_input_output.clone()), Opt::default());
+    let output_frames = fake_input_output
+        .stdout_writer
+        .output_frames
+        .lock()
+        .unwrap();
+    let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
+    for snapshot in snapshots {
+        assert_snapshot!(snapshot);
+    }
+}
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline-2.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline-2.snap
new file mode 100644
index 00000000..d1c18eb2
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline-2.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+                                                                                                                                                     
+ OS: 5.9.14-arch1-1 GNU/Linux                                                                                                                        
+ Uptime: 12 hours, 21 minutes                                                                                                                        
+ Hostname: kingdom                                                                                                                                   
+ Disk usage:                                                                                                                                         
+                                                                                                                                                     
+df: /run/user/1000/doc: Operation not permitted                                                                                                      
+	/	295G / 514G  61%                                                                                                                                  
+	/efi	 27M /  96M  28%                                                                                                                               
+                                                                                                                                                     
+ Network:                                                                                                                                            
+                                                                                                                                                     
+	wlp2s0  192.168.0.3                                                                                                                                 
+                                                                                                                                                     
+[I] [21:58] kingdom:mosaic (main) | echo -ne (\                                                                                                      
+                                            df -l -h | grep -E 'dev/(xvda|sd|mapper)' | \                                                            
+                                            awk '{printf "\\\\t%s\\\\t%4s / %4s  %s\\\\n\n", $6, $3, $2, $5}' | \                                    
+                                            sed -e 's/^\(.*\([8][5-9]\|[9][0-9]\)%.*\)$/\\\\e[0;31m\1\\\\e[0m/' -e 's/^\(.*\([7][5-9]\|[8][0-4]\)%.*\
+)$/\\\\e[0;33m\1\\\\e[0m/' | \                                                                                                                       
+)                                                                                                                                                    
+                                            paste -sd ''\                                                                                            
+                                        )█                                                                                                           
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline-3.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline-3.snap
new file mode 100644
index 00000000..a1cb439e
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline-3.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+ OS: 5.9.14-arch1-1 GNU/Linux                                                                                                                        
+ Uptime: 12 hours, 21 minutes                                                                                                                        
+ Hostname: kingdom                                                                                                                                   
+ Disk usage:                                                                                                                                         
+                                                                                                                                                     
+df: /run/user/1000/doc: Operation not permitted                                                                                                      
+	/	295G / 514G  61%                                                                                                                                  
+	/efi	 27M /  96M  28%                                                                                                                               
+                                                                                                                                                     
+ Network:                                                                                                                                            
+                                                                                                                                                     
+	wlp2s0  192.168.0.3                                                                                                                                 
+                                                                                                                                                     
+[I] [21:58] kingdom:mosaic (main) | echo -ne (\                                                                                                      
+                                            df -l -h | grep -E 'dev/(xvda|sd|mapper)' | \                                                            
+                                            awk '{printf "\\\\t%s\\\\t%4s / %4s  %s\\\\n\n", $6, $3, $2, $5}' | \                                    
+                                            sed -e 's/^\(.*\([8][5-9]\|[9][0-9]\)%.*\)$/\\\\e[0;31m\1\\\\e[0m/' -e 's/^\(.*\([7][5-9]\|[8][0-4]\)%.*\
+)$/\\\\e[0;33m\1\\\\e[0m/' | \                                                                                                                       
+)                                                                                                                                                    
+                                            paste -sd ''\                                                                                            
+                                        )                                                                                                            
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+                                                                                                                                                     
+Bye from Mosaic!█                                                                                                                                    
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline.snap b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline.snap
new file mode 100644
index 00000000..739c38e6
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__compatibility__fish_paste_multiline.snap
@@ -0,0 +1,32 @@
+---
+source: src/tests/integration/compatibility.rs
+expression: snapshot
+---
+█                                                                                                                                                    
+                                                                                                                                                     
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+                                                                                                                                                     
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+