Implement X11 clipboard integration (Issue #5376).

components/script/Cargo.toml

@@ -69,6 +69,12 @@ git = "https://github.com/servo/string-cache"
 [dependencies.string_cache_plugin]
 git = "https://github.com/servo/string-cache"
 
+[dependencies.xlib]
+git = "https://github.com/servo/rust-xlib"
+
+[dependencies.clipboard]
+git = "https://github.com/aweinstock314/rust-x11-clipboard"
+
 [dependencies]
 encoding = "0.2"
 url = "0.2.16"

components/script/lib.rs

@@ -52,6 +52,7 @@ extern crate style;
 extern crate url;
 extern crate uuid;
 extern crate string_cache;
+extern crate clipboard;
 
 pub mod cors;
 

components/script/textinput.rs

@@ -14,6 +14,8 @@ use std::cmp::{min, max};
 use std::default::Default;
 use std::num::SignedInt;
 
+use clipboard::ClipboardContext;
+
 #[derive(Copy, PartialEq)]
 pub enum Selection {
     Selected,
@@ -29,6 +31,8 @@ pub struct TextPoint {
     pub index: usize,
 }
 
+no_jsmanaged_fields!(ClipboardContext);
+
 /// Encapsulated state for handling keyboard input in a single or multiline text input control.
 #[jstraceable]
 pub struct TextInput {
@@ -40,6 +44,8 @@ pub struct TextInput {
     selection_begin: Option<TextPoint>,
     /// Is this a multiline input?
     multiline: bool,
+    /// Means of accessing the clipboard
+    clipboard_ctx: ClipboardContext,
 }
 
 /// Resulting action to be taken by the owner of a text input that is handling an event.
@@ -93,6 +99,7 @@ impl TextInput {
             edit_point: Default::default(),
             selection_begin: None,
             multiline: lines == Lines::Multiple,
+            clipboard_ctx: ClipboardContext::new().unwrap(),
         };
         i.set_content(initial);
         i
@@ -118,6 +125,15 @@ impl TextInput {
         self.replace_selection(ch.to_string());
     }
 
+    /// Insert a string at the current editing point
+    fn insert_string(&mut self, s: &str) {
+        // it looks like this could be made performant by avoiding some redundant
+        //  selection-related checks, but use the simple implementation for now
+        for ch in s.chars() {
+            self.insert_char(ch);
+        }
+    }
+
     pub fn get_sorted_selection(&self) -> (TextPoint, TextPoint) {
         let begin = self.selection_begin.unwrap();
         let end = self.edit_point;
@@ -282,10 +298,15 @@ impl TextInput {
                 self.select_all();
                 KeyReaction::Nothing
             },
+            "v" if is_control_key(event) => {
+                let contents = self.clipboard_ctx.get_contents().unwrap();
+                self.insert_string(contents.as_slice());
+                KeyReaction::DispatchInput
+            },
             // printable characters have single-character key values
             c if c.len() == 1 => {
                 self.insert_char(c.char_at(0));
-                return KeyReaction::DispatchInput;
+                KeyReaction::DispatchInput
             }
             "Space" => {
                 self.insert_char(' ');