71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
//! This module contains various bits and pieces for drag and drop operations. They're shared
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//! across the codebase, hence why they're here - they're not currently exhaustive, so feel free to
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//! tinker and pull request.
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use objc::runtime::Object;
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use objc::{msg_send, sel, sel_impl};
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use objc_id::Id;
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use crate::foundation::NSUInteger;
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use crate::pasteboard::Pasteboard;
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/// Represents operations that can happen for a given drag/drop scenario.
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pub enum DragOperation {
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/// No drag operations are allowed.
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None,
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/// The data represented by the image can be copied.
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Copy,
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/// The data can be shared.
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Link,
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/// The operation can be defined by the destination.
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Generic,
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/// The operation is negotiated privately between the source and the destination.
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Private,
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/// The data can be moved.
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Move,
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/// The data can be deleted.
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Delete,
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// All of the above.
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// @TODO: NSUIntegerMax, a tricky beast
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// Every
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}
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impl From<DragOperation> for NSUInteger {
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fn from(op: DragOperation) -> Self {
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match op {
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DragOperation::None => 0,
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DragOperation::Copy => 1,
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DragOperation::Link => 2,
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DragOperation::Generic => 4,
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DragOperation::Private => 8,
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DragOperation::Move => 16,
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DragOperation::Delete => 32
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}
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}
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}
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/// A wrapper for `NSDraggingInfo`. As this is a protocol/type you should never create yourself,
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/// this only provides getters - merely a Rust-y way to grab what you need.
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pub struct DragInfo {
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pub info: Id<Object>
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}
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impl DragInfo {
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/// Returns a wrapped Pasteboard instance, enabling you to get the contents of whatever is
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/// being pasted/dragged/dropped/etc.
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///
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/// Note: in general, you should not store pasteboards.
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pub fn get_pasteboard(&self) -> Pasteboard {
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unsafe {
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Pasteboard::with(msg_send![&*self.info, draggingPasteboard])
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}
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}
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}
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