Merge pull request #3 from gertdreyer/features/activeWindowTitle

Added Window Title on Windows

src/common/active_window.rs

@@ -2,6 +2,7 @@ use super::window_position::WindowPosition;
 
 #[derive(Debug)]
 pub struct ActiveWindow {
+    pub title: String,
     pub window_id: String,
     pub process_id: u64,
     pub position: WindowPosition

src/linux/platform_api.rs

@@ -106,6 +106,7 @@ impl PlatformApi for LinuxPlatformApi {
             process_id: window_pid.try_into().unwrap(),
             window_id: active_window.resource_id().to_string(),
             position,
+            title: String::from(""),
         })
     }
 }

src/mac/platform_api.rs

@@ -81,7 +81,8 @@ impl PlatformApi for MacPlatformApi {
                     let active_window = ActiveWindow {
                         window_id: window_id.to_string(),
                         process_id: active_window_pid as u64,
-                        position: win_pos
+                        position: win_pos,
+                        title: String::from(""),
                     };
 
                     return Ok(active_window)

src/win/platform_api.rs

@@ -4,7 +4,7 @@ use winapi::shared::windef::HWND__;
 use winapi::um::winuser::{GetWindowThreadProcessId};
 use winapi::{
     shared::windef::{ RECT },
-    um::{winuser::{ GetForegroundWindow, GetWindowRect }}
+    um::winuser::{GetForegroundWindow, GetWindowRect, GetWindowTextW},
 };
 use super::window_position::FromWinRect;
 
@@ -26,13 +26,14 @@ impl PlatformApi for WindowsPlatformApi {
     fn get_active_window(&self) -> Result<ActiveWindow, ()> {
         let active_window = get_foreground_window()?;
         let active_window_position = self.get_position()?;
-
+        let active_window_title = get_window_title(active_window)?;
         let lpdw_process_id = unsafe {
             let pid_ptr: *mut u32 = std::mem::zeroed();
             GetWindowThreadProcessId(active_window, pid_ptr)
         };
 
         let active_window = ActiveWindow {
+            title: active_window_title,
             position: active_window_position,
             process_id: lpdw_process_id as u64,
             window_id: format!("{:?}", active_window),
@@ -42,6 +43,19 @@ impl PlatformApi for WindowsPlatformApi {
     }
 }
 
+fn get_window_title(hwnd: *mut HWND__) -> Result<String, ()> {
+    let title: String;
+    unsafe {
+        let mut v: [u16; 255] = std::mem::zeroed();
+        let title_len = GetWindowTextW(hwnd, v.as_mut_ptr(), 255) as usize;
+        if title_len == 0 {
+            return Err(());
+        }
+        title = String::from_utf16_lossy(&v[0..title_len]);
+    };
+    Ok(title)
+}
+
 fn get_foreground_window() -> Result<*mut HWND__, ()> {
     let active_window = unsafe { GetForegroundWindow() };