Implement ProcessingInstruction DOM interface

Spec:
http://dom.spec.whatwg.org/#interface-processinginstruction

Closes #1619.

src/components/main/layout/construct.rs

@@ -36,7 +36,8 @@ use layout::wrapper::{PostorderNodeMutTraversal, TLayoutNode, ThreadSafeLayoutNo
 use gfx::font_context::FontContext;
 use script::dom::element::{HTMLIframeElementTypeId, HTMLImageElementTypeId};
 use script::dom::node::{CommentNodeTypeId, DoctypeNodeTypeId, DocumentFragmentNodeTypeId};
-use script::dom::node::{DocumentNodeTypeId, ElementNodeTypeId, TextNodeTypeId};
+use script::dom::node::{DocumentNodeTypeId, ElementNodeTypeId, ProcessingInstructionNodeTypeId};
+use script::dom::node::{TextNodeTypeId};
 use style::computed_values::{display, position, float, white_space};
 use style::ComputedValues;
 
@@ -633,7 +634,8 @@ impl<'a> PostorderNodeMutTraversal for FlowConstructor<'a> {
             CommentNodeTypeId |
             DoctypeNodeTypeId |
             DocumentFragmentNodeTypeId |
-            DocumentNodeTypeId(_) => (display::none, float::none, position::static_),
+            DocumentNodeTypeId(_) |
+            ProcessingInstructionNodeTypeId => (display::none, float::none, position::static_),
         };
 
         debug!("building flow for node: {:?} {:?}", display, float);
@@ -701,6 +703,7 @@ impl<'ln> NodeUtils for ThreadSafeLayoutNode<'ln> {
     fn is_replaced_content(self) -> bool {
         match self.type_id() {
             TextNodeTypeId |
+            ProcessingInstructionNodeTypeId |
             CommentNodeTypeId |
             DoctypeNodeTypeId |
             DocumentFragmentNodeTypeId |

src/components/script/dom/bindings/codegen/Bindings.conf

@@ -583,6 +583,7 @@ def addExternalIface(iface, nativeType=None, headerFile=None, pointerType=None):
         domInterface['pointerType'] = pointerType
     DOMInterfaces[iface] = domInterface
 
+# FIXME: This should be renamed: https://github.com/mozilla/servo/issues/1625
 def addHTMLElement(element, concrete=None, needsAbstract=[]):
   DOMInterfaces[element] = {
     'nativeType': 'AbstractNode',
@@ -596,6 +597,7 @@ addHTMLElement('Comment')
 addHTMLElement('DocumentFragment', concrete='DocumentFragment')
 addHTMLElement('DocumentType')
 addHTMLElement('Text')
+addHTMLElement('ProcessingInstruction')
 
 addHTMLElement('HTMLAnchorElement')
 addHTMLElement('HTMLAppletElement')

src/components/script/dom/bindings/element.rs

@@ -107,6 +107,9 @@ generate_traceable_node!(DocumentType)
 generate_cacheable_wrapper!(Text, TextBinding::Wrap)
 generate_traceable!(Text)
 
+generate_cacheable_wrapper!(ProcessingInstruction, ProcessingInstruction::Wrap)
+generate_traceable!(ProcessingInstruction)
+
 generate_cacheable_wrapper_htmlelement!(HTMLHeadElement, HTMLHeadElementBinding::Wrap)
 generate_traceable_htmlelement!(HTMLHeadElement)
 

src/components/script/dom/htmlserializer.rs

@@ -5,7 +5,9 @@
 use servo_util::namespace;
 use dom::attr::Attr;
 use dom::node::NodeIterator;
-use dom::node::{DoctypeNodeTypeId, DocumentFragmentNodeTypeId, CommentNodeTypeId, DocumentNodeTypeId, ElementNodeTypeId, TextNodeTypeId, AbstractNode};
+use dom::node::{DoctypeNodeTypeId, DocumentFragmentNodeTypeId, CommentNodeTypeId};
+use dom::node::{DocumentNodeTypeId, ElementNodeTypeId, ProcessingInstructionNodeTypeId};
+use dom::node::{TextNodeTypeId, AbstractNode};
 
 pub fn serialize(iterator: &mut NodeIterator) -> ~str {
     let mut html = ~"";
@@ -29,6 +31,9 @@ pub fn serialize(iterator: &mut NodeIterator) -> ~str {
                 DoctypeNodeTypeId => {
                     serialize_doctype(node)
                 }
+                ProcessingInstructionNodeTypeId => {
+                    serialize_processing_instruction(node)
+                }
                 DocumentFragmentNodeTypeId => {
                     ~""
                 }
@@ -70,6 +75,12 @@ fn serialize_text(node: AbstractNode) -> ~str {
     })
 }
 
+fn serialize_processing_instruction(node: AbstractNode) -> ~str {
+    node.with_imm_processing_instruction(|processing_instruction| {
+        ~"<?" + processing_instruction.target + " " + processing_instruction.element.data + "?>"
+    })
+}
+
 fn serialize_doctype(node: AbstractNode) -> ~str {
     node.with_imm_doctype(|doctype| {
         ~"<!DOCTYPE" + doctype.name + ">"

src/components/script/dom/node.rs

@@ -18,6 +18,7 @@ use dom::htmliframeelement::HTMLIFrameElement;
 use dom::htmlimageelement::HTMLImageElement;
 use dom::nodelist::{NodeList};
 use dom::text::Text;
+use dom::processinginstruction::ProcessingInstruction;
 use layout_interface::{LayoutChan, ReapLayoutDataMsg, UntrustedNodeAddress};
 
 use js::jsapi::{JSContext, JSObject, JSRuntime};
@@ -199,6 +200,7 @@ pub enum NodeTypeId {
     DocumentNodeTypeId(DocumentTypeId),
     ElementNodeTypeId(ElementTypeId),
     TextNodeTypeId,
+    ProcessingInstructionNodeTypeId,
 }
 
 impl Clone for AbstractNode {
@@ -362,8 +364,7 @@ impl<'a> AbstractNode {
 
     // FIXME: This should be doing dynamic borrow checking for safety.
     pub fn is_characterdata(self) -> bool {
-        // FIXME: ProcessingInstruction
-        self.is_text() || self.is_comment()
+        self.is_text() || self.is_comment() || self.is_processing_instruction()
     }
 
     pub fn with_imm_characterdata<R>(self, f: |&CharacterData| -> R) -> R {
@@ -432,6 +433,18 @@ impl<'a> AbstractNode {
         self.transmute_mut(f)
     }
 
+    #[inline]
+    pub fn is_processing_instruction(self) -> bool {
+        self.type_id() == ProcessingInstructionNodeTypeId
+    }
+
+    pub fn with_imm_processing_instruction<R>(self, f: |&ProcessingInstruction| -> R)  -> R {
+        if !self.is_processing_instruction() {
+            fail!("node is not processing instruction");
+        }
+        self.transmute(f)
+    }
+
     // FIXME: This should be doing dynamic borrow checking for safety.
     pub fn with_imm_element<R>(self, f: |&Element| -> R) -> R {
         if !self.is_element() {
@@ -920,8 +933,9 @@ impl Node {
         match self.type_id {
             ElementNodeTypeId(_)            => 1,
             TextNodeTypeId                  => 3,
+            ProcessingInstructionNodeTypeId => 7,
             CommentNodeTypeId               => 8,
-            DocumentNodeTypeId(_)=> 9,
+            DocumentNodeTypeId(_)           => 9,
             DoctypeNodeTypeId               => 10,
             DocumentFragmentNodeTypeId      => 11,
         }
@@ -934,8 +948,13 @@ impl Node {
                     element.TagName()
                 })
             }
-            CommentNodeTypeId => ~"#comment",
             TextNodeTypeId => ~"#text",
+            ProcessingInstructionNodeTypeId => {
+                abstract_self.with_imm_processing_instruction(|processing_instruction| {
+                    processing_instruction.Target()
+                })
+            }
+            CommentNodeTypeId => ~"#comment",
             DoctypeNodeTypeId => {
                 abstract_self.with_imm_doctype(|doctype| {
                     doctype.name.clone()
@@ -955,6 +974,7 @@ impl Node {
             ElementNodeTypeId(..) |
             CommentNodeTypeId |
             TextNodeTypeId |
+            ProcessingInstructionNodeTypeId |
             DoctypeNodeTypeId |
             DocumentFragmentNodeTypeId => Some(self.owner_doc()),
             DocumentNodeTypeId(_) => None
@@ -991,8 +1011,9 @@ impl Node {
 
     pub fn GetNodeValue(&self, abstract_self: AbstractNode) -> Option<DOMString> {
         match self.type_id {
-            // ProcessingInstruction
-            CommentNodeTypeId | TextNodeTypeId => {
+            CommentNodeTypeId |
+            TextNodeTypeId |
+            ProcessingInstructionNodeTypeId => {
                 abstract_self.with_imm_characterdata(|characterdata| {
                     Some(characterdata.Data())
                 })
@@ -1010,7 +1031,8 @@ impl Node {
 
     pub fn GetTextContent(&self, abstract_self: AbstractNode) -> Option<DOMString> {
         match self.type_id {
-          DocumentFragmentNodeTypeId | ElementNodeTypeId(..) => {
+            DocumentFragmentNodeTypeId |
+            ElementNodeTypeId(..) => {
                 let mut content = ~"";
                 for node in abstract_self.traverse_preorder() {
                     if node.is_text() {
@@ -1021,12 +1043,15 @@ impl Node {
                 }
                 Some(content)
             }
-          CommentNodeTypeId | TextNodeTypeId => {
+            CommentNodeTypeId |
+            TextNodeTypeId |
+            ProcessingInstructionNodeTypeId => {
                 abstract_self.with_imm_characterdata(|characterdata| {
                     Some(characterdata.Data())
                 })
             }
-          DoctypeNodeTypeId | DocumentNodeTypeId(_) => {
+            DoctypeNodeTypeId |
+            DocumentNodeTypeId(_) => {
                 None
             }
         }
@@ -1101,7 +1126,7 @@ impl Node {
             }
             DocumentFragmentNodeTypeId |
             ElementNodeTypeId(_) |
-            // ProcessingInstructionNodeTypeId |
+            ProcessingInstructionNodeTypeId |
             CommentNodeTypeId => (),
             DocumentNodeTypeId(..) => return Err(HierarchyRequest)
         }
@@ -1175,7 +1200,7 @@ impl Node {
                         }
                     },
                     TextNodeTypeId |
-                    // ProcessingInstructionNodeTypeId |
+                    ProcessingInstructionNodeTypeId |
                     CommentNodeTypeId => (),
                     DocumentNodeTypeId(_) => unreachable!(),
                 }
@@ -1319,7 +1344,8 @@ impl Node {
                           -> ErrorResult {
         let value = null_str_as_empty(&value);
         match self.type_id {
-          DocumentFragmentNodeTypeId | ElementNodeTypeId(..) => {
+            DocumentFragmentNodeTypeId |
+            ElementNodeTypeId(..) => {
                 // Step 1-2.
                 let node = if value.len() == 0 {
                     None
@@ -1330,7 +1356,9 @@ impl Node {
                 // Step 3.
                 Node::replace_all(node, abstract_self);
             }
-          CommentNodeTypeId | TextNodeTypeId => {
+            CommentNodeTypeId |
+            TextNodeTypeId |
+            ProcessingInstructionNodeTypeId => {
                 self.wait_until_safe_to_modify_dom();
 
                 abstract_self.with_mut_characterdata(|characterdata| {
@@ -1341,7 +1369,8 @@ impl Node {
                     document.document().content_changed();
                 })
             }
-          DoctypeNodeTypeId | DocumentNodeTypeId(_) => {}
+            DoctypeNodeTypeId |
+            DocumentNodeTypeId(_) => {}
         }
         Ok(())
     }
@@ -1390,7 +1419,7 @@ impl Node {
             DoctypeNodeTypeId |
             ElementNodeTypeId(..) |
             TextNodeTypeId |
-            // ProcessingInstructionNodeTypeId |
+            ProcessingInstructionNodeTypeId |
             CommentNodeTypeId => (),
             DocumentNodeTypeId(..) => return Err(HierarchyRequest)
         }
@@ -1443,7 +1472,7 @@ impl Node {
                         }
                     },
                     TextNodeTypeId |
-                    // ProcessingInstructionNodeTypeId |
+                    ProcessingInstructionNodeTypeId |
                     CommentNodeTypeId => (),
                     DocumentNodeTypeId(..) => unreachable!()
                 }

src/components/script/dom/processinginstruction.rs

@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::codegen::ProcessingInstructionBinding;
+use dom::bindings::utils::DOMString;
+use dom::characterdata::CharacterData;
+use dom::document::AbstractDocument;
+use dom::node::{AbstractNode, Node, ProcessingInstructionNodeTypeId};
+
+/// An HTML processing instruction node.
+pub struct ProcessingInstruction {
+    // FIXME: s/element/characterdata/ https://github.com/mozilla/servo/issues/1594
+    element: CharacterData,
+    target: DOMString,
+}
+
+impl ProcessingInstruction {
+    pub fn new_inherited(target: DOMString, data: DOMString, document: AbstractDocument) -> ProcessingInstruction {
+        ProcessingInstruction {
+            element: CharacterData::new_inherited(ProcessingInstructionNodeTypeId, data, document),
+            target: target
+        }
+    }
+
+    pub fn new(target: DOMString, data: DOMString, document: AbstractDocument) -> AbstractNode {
+        let node = ProcessingInstruction::new_inherited(target, data, document);
+        Node::reflect_node(@mut node, document, ProcessingInstructionBinding::Wrap)
+    }
+}
+
+impl ProcessingInstruction {
+    pub fn Target(&self) -> DOMString {
+        self.target.clone()
+    }
+}

src/components/script/dom/webidls/ProcessingInstruction.webidl

@@ -0,0 +1,12 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#interface-processinginstruction
+ */
+
+interface ProcessingInstruction : CharacterData {
+  readonly attribute DOMString target;
+};

src/components/script/script.rc

@@ -140,6 +140,7 @@ pub mod dom {
     pub mod navigator;
     pub mod node;
     pub mod nodelist;
+    pub mod processinginstruction;
     pub mod uievent;
     pub mod text;
     pub mod validitystate;