improve tty

1 files changed, 134 insertions, 0 deletions

diff --git a/tests/modules/tty/cursor_control.lua b/tests/modules/tty/cursor_control.lua
new file mode 100644
index 000000000..2a28bed93
--- /dev/null
+++ b/tests/modules/tty/cursor_control.lua
@@ -0,0 +1,134 @@
+import("core.base.tty")
+import("core.base.scheduler")
+
+-- Demo TTY cursor position control features
+-- Implement partial screen refresh
+
+function _progress_bar_inline(label, progress)
+    local bar_width = 40
+    local filled = math.floor(progress * bar_width)
+    local bar = string.rep("█", filled) .. string.rep("░", bar_width - filled)
+    
+    -- Clear the line and output content
+    tty.cr()
+    tty.erase_line()
+    io.write(string.format("%s: [%s] %3d%%", label, bar, math.floor(progress * 100)))
+    io.flush()
+end
+
+function main()
+    -- Check if ANSI control codes are supported
+    if not tty.has_vtansi() then
+        print("Terminal does not support ANSI control codes")
+        return
+    end
+
+    print("=== TTY Cursor Control Demo ===")
+    print("This demo shows partial screen refresh using cursor positioning")
+    print("\n")
+    
+    -- Hide cursor for smoother display
+    tty.cursor_hide()
+    
+    print("Demo 1: Multiple Progress Bars (Parallel Updates)")
+    print("------------------------------------------------")
+    
+    -- Reserve lines for progress bars
+    print("Task 1: Downloading")
+    print("Task 2: Compiling  ")
+    print("Task 3: Linking    ")
+    
+    -- Simulate three parallel task progress bars
+    for step = 1, 100 do
+        -- Task 1 progress
+        local progress1 = step / 100
+        tty.cursor_save()
+        tty.cursor_move_up(3)
+        _progress_bar_inline("Task 1: Downloading", progress1)
+        tty.cursor_restore()
+        
+        -- Task 2 progress (starts later, progresses faster)
+        local progress2 = math.max(0, math.min(1.0, (step - 10) / 80))
+        tty.cursor_save()
+        tty.cursor_move_up(2)
+        _progress_bar_inline("Task 2: Compiling  ", progress2)
+        tty.cursor_restore()
+        
+        -- Task 3 progress (starts even later)
+        local progress3 = math.max(0, math.min(1.0, (step - 30) / 60))
+        tty.cursor_save()
+        tty.cursor_move_up(1)
+        _progress_bar_inline("Task 3: Linking    ", progress3)
+        tty.cursor_restore()
+        
+        os.sleep(30)  -- 30ms delay
+    end
+    
+    print("\n\nDemo 2: Dynamic Status Updates")
+    print("--------------------------------")
+    
+    -- Print initial status and counter
+    print("Status: Waiting...")
+    print("Counter: 0")
+    
+    local statuses = {
+        "Initializing...",
+        "Loading configuration...",
+        "Parsing files...",
+        "Building dependencies...",
+        "Compiling sources...",
+        "Linking executable...",
+        "Done!"
+    }
+    
+    for i, status in ipairs(statuses) do
+        -- Update status line
+        tty.cursor_save()
+        tty.cursor_move_up(2)
+        tty.cr()
+        tty.erase_line()
+        io.write(string.format("Status: %s", status))
+        io.flush()
+        tty.cursor_restore()
+        
+        -- Update counter line
+        tty.cursor_save()
+        tty.cursor_move_up(1)
+        tty.cr()
+        tty.erase_line()
+        io.write(string.format("Counter: %d", i * 100))
+        io.flush()
+        tty.cursor_restore()
+        
+        os.sleep(500)
+    end
+    
+    -- Restore cursor visibility
+    tty.cursor_show()
+    
+    print("\n\nDemo 3: Erase and Update Specific Line")
+    print("----------------------------------------")
+    
+    print("Line 1: This line will stay")
+    print("Line 2: This line will be updated...")
+    print("Line 3: This line will stay too")
+    
+    os.sleep(1000)
+    
+    -- Update only the middle line
+    tty.cursor_save()
+    tty.cursor_move_up(2)
+    tty.cr()
+    tty.erase_line()
+    io.write("Line 2: Updated content! ✓")
+    io.flush()
+    tty.cursor_restore()
+    print("\n\nAll demos completed!")
+    print("\nKey features demonstrated:")
+    print("  - cursor_move_up/down/left/right: Move cursor relatively")
+    print("  - cursor_save/restore: Save and restore cursor position")
+    print("  - erase_line(): Clear current line")
+    print("  - cursor_hide()/cursor_show(): Control cursor visibility")
+    print("  - Partial screen refresh without clearing entire screen")
+end
+