From edd00dc563361478c6c0d7c4c8132b119e180f94 Mon Sep 17 00:00:00 2001
From: zyl <z@zyl.gay>
Date: Thu, 23 Jan 2025 13:54:26 -0800
Subject: [PATCH] Implement drag and drop file support

---
 src/input.rs   |  7 ++++++-
 src/lib.rs     | 27 +++++++++++++++++++++++++++
 src/prelude.rs |  2 +-
 3 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/src/input.rs b/src/input.rs
index 3f9afd84..29fb1f4b 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -2,10 +2,10 @@
 
 use std::collections::HashSet;
 
-use crate::get_context;
 use crate::prelude::screen_height;
 use crate::prelude::screen_width;
 use crate::Vec2;
+use crate::{get_context, DroppedFile};
 pub use miniquad::{KeyCode, MouseButton};
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
@@ -212,6 +212,11 @@ pub fn is_quit_requested() -> bool {
     get_context().quit_requested
 }
 
+/// Gets the files which have been dropped on the window.
+pub fn get_dropped_files() -> Vec<DroppedFile> {
+    get_context().dropped_files()
+}
+
 /// Functions for advanced input processing.
 ///
 /// Functions in this module should be used by external tools that uses miniquad system, like different UI libraries. User shouldn't use this function.
diff --git a/src/lib.rs b/src/lib.rs
index c9d5b131..821dd3df 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -229,6 +229,8 @@ struct Context {
     textures: crate::texture::TexturesContext,
 
     update_on: conf::UpdateTrigger,
+
+    dropped_files: Vec<DroppedFile>,
 }
 
 #[derive(Clone)]
@@ -367,6 +369,8 @@ impl Context {
             default_filter_mode,
             textures: crate::texture::TexturesContext::new(),
             update_on,
+
+            dropped_files: Vec::new(),
         }
     }
 
@@ -385,6 +389,11 @@ impl Context {
         }
     }
 
+    /// Returns the files which have been dropped onto the window.
+    pub fn dropped_files(&mut self) -> Vec<DroppedFile> {
+        std::mem::take(&mut self.dropped_files)
+    }
+
     fn begin_frame(&mut self) {
         telemetry::begin_gpu_query("GPU");
 
@@ -441,6 +450,8 @@ impl Context {
                 touch.phase = input::TouchPhase::Stationary;
             }
         }
+
+        self.dropped_files.clear();
     }
 
     pub(crate) fn pixel_perfect_projection_matrix(&self) -> glam::Mat4 {
@@ -700,6 +711,16 @@ impl EventHandler for Stage {
         }
     }
 
+    fn files_dropped_event(&mut self) {
+        let context = get_context();
+        for i in 0..miniquad::window::dropped_file_count() {
+            context.dropped_files.push(DroppedFile {
+                path: miniquad::window::dropped_file_path(i),
+                bytes: miniquad::window::dropped_file_bytes(i),
+            });
+        }
+    }
+
     fn draw(&mut self) {
         {
             let _z = telemetry::ZoneGuard::new("Event::draw");
@@ -886,3 +907,9 @@ impl Window {
         });
     }
 }
+
+/// Information about a dropped file.
+pub struct DroppedFile {
+    pub path: Option<std::path::PathBuf>,
+    pub bytes: Option<Vec<u8>>,
+}
diff --git a/src/prelude.rs b/src/prelude.rs
index f70b48d2..5a524c36 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -24,6 +24,6 @@ pub use crate::experimental::*;
 
 pub use crate::logging::*;
 
-pub use crate::color_u8;
+pub use crate::{color_u8, DroppedFile};
 
 pub use image::ImageFormat;