From deb4454c3565a8d1d3115f21ebe40339e216b7dd Mon Sep 17 00:00:00 2001
From: DoumanAsh <douman@gmx.se>
Date: Tue, 5 Mar 2024 22:12:53 +0900
Subject: [PATCH] Add binding to GetPriorityClipboardFormat

---
 src/raw.rs         | 16 ++++++++++++++++
 src/sys.rs         |  1 +
 tests/test_clip.rs |  7 +++++++
 3 files changed, 24 insertions(+)

diff --git a/src/raw.rs b/src/raw.rs
index 101e802..0cfa65e 100644
--- a/src/raw.rs
+++ b/src/raw.rs
@@ -207,6 +207,22 @@ pub fn is_format_avail(format: c_uint) -> bool {
     unsafe { IsClipboardFormatAvailable(format) != 0 }
 }
 
+#[inline(always)]
+///Returns the first available format in the specified list
+///
+///Returns `None` if no format is available or clipboard is empty
+pub fn which_format_avail(formats: &[c_uint]) -> Option<NonZeroU32> {
+    let result = unsafe {
+        GetPriorityClipboardFormat(formats.as_ptr(), formats.len() as _)
+    };
+    if result < 0 {
+        None
+    } else {
+        NonZeroU32::new(result as _)
+    }
+}
+
+
 #[inline]
 ///Retrieves number of currently available formats on clipboard.
 ///
diff --git a/src/sys.rs b/src/sys.rs
index ed7f0a1..37ec106 100644
--- a/src/sys.rs
+++ b/src/sys.rs
@@ -23,6 +23,7 @@ extern "system" {
     pub fn EmptyClipboard() -> BOOL;
     pub fn GetClipboardSequenceNumber() -> DWORD;
     pub fn IsClipboardFormatAvailable(format: c_uint) -> BOOL;
+    pub fn GetPriorityClipboardFormat(formats: *const c_uint, size: c_int) -> BOOL;
     pub fn CountClipboardFormats() -> c_int;
     pub fn EnumClipboardFormats(format: c_uint) -> c_uint;
     pub fn GetClipboardFormatNameW(format: c_uint, lpszFormatName: *mut u16, cchMaxCount: c_int) -> c_int;
diff --git a/tests/test_clip.rs b/tests/test_clip.rs
index 5d76347..e610e86 100644
--- a/tests/test_clip.rs
+++ b/tests/test_clip.rs
@@ -1,4 +1,5 @@
 use clipboard_win::{Getter, Setter, Clipboard, is_format_avail, types};
+use clipboard_win::raw::which_format_avail;
 use clipboard_win::formats::{Html, RawData, Unicode, Bitmap, CF_TEXT, CF_UNICODETEXT, CF_BITMAP, FileList, CF_HDROP};
 
 fn should_set_file_list() {
@@ -38,6 +39,10 @@ fn should_work_with_string() {
 
     Unicode.write_clipboard(&text).expect("Write text");
 
+    let first_format = which_format_avail(&[CF_TEXT, CF_UNICODETEXT]).unwrap();
+    assert!(is_format_avail(CF_UNICODETEXT));
+    assert_eq!(CF_UNICODETEXT, first_format.get());
+
     let mut output = String::new();
 
     assert_eq!(Unicode.read_clipboard(&mut output).expect("Read text"), text.len());
@@ -127,10 +132,12 @@ fn should_set_get_html() {
     assert_eq!(html1.code(), html2.code());
 
     assert!(!is_format_avail(html1.code()));
+    assert!(which_format_avail(&[html1.code()]).is_none());
     let _clip = Clipboard::new_attempts(10).expect("Open clipboard");
     html1.write_clipboard(&HTML).expect("write clipboard");
 
     assert!(is_format_avail(html1.code()));
+    assert_eq!(which_format_avail(&[CF_TEXT, html1.code()]).unwrap().get(), html1.code());
 
     let mut out = String::new();
     html1.read_clipboard(&mut out).expect("read clipboard");