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use gdk::Atom;
use gtk::{TargetEntry, TargetFlags};
use crate::clipboard::{ClipboardFormat, FormatId};
const CLIPBOARD_TARGETS: [&str; 5] = [
"UTF8_STRING",
"TEXT",
"STRING",
"text/plain;charset=utf-8",
"text/plain",
];
#[derive(Clone)]
pub struct Clipboard {
pub(crate) selection: Atom,
}
impl std::fmt::Debug for Clipboard {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let name = match self.selection {
gdk::SELECTION_PRIMARY => "Primary",
gdk::SELECTION_CLIPBOARD => "Clipboard",
_ => "(other)",
};
f.debug_tuple("Clipboard").field(&name).finish()
}
}
impl Clipboard {
pub fn put_string(&mut self, string: impl AsRef<str>) {
let string = string.as_ref().to_string();
let display = gdk::Display::get_default().unwrap();
let clipboard = gtk::Clipboard::get_for_display(&display, &self.selection);
let targets: Vec<TargetEntry> = CLIPBOARD_TARGETS
.iter()
.enumerate()
.map(|(i, target)| TargetEntry::new(target, TargetFlags::all(), i as u32))
.collect();
clipboard.set_with_data(&targets, move |_, selection, _| {
const STRIDE_BITS: i32 = 8;
selection.set(&selection.get_target(), STRIDE_BITS, string.as_bytes());
});
}
pub fn put_formats(&mut self, formats: &[ClipboardFormat]) {
let entries = make_entries(formats);
let display = gdk::Display::get_default().unwrap();
let clipboard = gtk::Clipboard::get_for_display(&display, &self.selection);
let formats = formats.to_owned();
let success = clipboard.set_with_data(&entries, move |_, sel, idx| {
tracing::info!("got paste callback {}", idx);
let idx = idx as usize;
if idx < formats.len() {
let item = &formats[idx];
if let (ClipboardFormat::TEXT, Ok(data)) =
(item.identifier, std::str::from_utf8(&item.data))
{
sel.set_text(data);
} else {
let atom = Atom::intern(item.identifier);
let stride = 8;
sel.set(&atom, stride, item.data.as_slice());
}
}
});
if !success {
tracing::warn!("failed to set clipboard data.");
}
}
pub fn get_string(&self) -> Option<String> {
let display = gdk::Display::get_default().unwrap();
let clipboard = gtk::Clipboard::get_for_display(&display, &self.selection);
for target in &CLIPBOARD_TARGETS {
let atom = Atom::intern(target);
if let Some(selection) = clipboard.wait_for_contents(&atom) {
return String::from_utf8(selection.get_data()).ok();
}
}
None
}
pub fn preferred_format(&self, formats: &[FormatId]) -> Option<FormatId> {
let display = gdk::Display::get_default().unwrap();
let clipboard = gtk::Clipboard::get_for_display(&display, &self.selection);
let targets = clipboard.wait_for_targets()?;
let format_atoms = formats
.iter()
.map(|fmt| Atom::intern(fmt))
.collect::<Vec<_>>();
for atom in targets.iter() {
if let Some(idx) = format_atoms.iter().position(|fmt| fmt == atom) {
return Some(formats[idx]);
}
}
None
}
pub fn get_format(&self, format: FormatId) -> Option<Vec<u8>> {
let display = gdk::Display::get_default().unwrap();
let clipboard = gtk::Clipboard::get_for_display(&display, &self.selection);
let atom = Atom::intern(format);
clipboard
.wait_for_contents(&atom)
.map(|data| data.get_data())
}
pub fn available_type_names(&self) -> Vec<String> {
let display = gdk::Display::get_default().unwrap();
let clipboard = gtk::Clipboard::get_for_display(&display, &self.selection);
let targets = clipboard.wait_for_targets().unwrap_or_default();
targets
.iter()
.map(|atom| format!("{} ({})", atom.name(), unsafe { atom.value() }))
.collect()
}
}
fn make_entries(formats: &[ClipboardFormat]) -> Vec<TargetEntry> {
formats
.iter()
.enumerate()
.map(|(i, fmt)| TargetEntry::new(fmt.identifier, TargetFlags::all(), i as u32))
.collect()
}