servo: Merge #5593 - 4873 - Support the image map processing for <img ismap/> inside an <a/> (from shinglyu:ismap); r=jdm

This implements issue 4873

Source-Repo: https://github.com/servo/servo
Source-Revision: 4fac8b6810d9d748fffc025cfd1bb1d2b6c5655d

servo/components/layout/layout_task.rs

@@ -10,6 +10,7 @@
 use animation;
 use construct::ConstructionResult;
 use context::{SharedLayoutContext, SharedLayoutContextWrapper};
+use css::node_style::StyledNode;
 use display_list_builder::ToGfxColor;
 use flow::{self, Flow, ImmutableFlowUtils, MutableFlowUtils, MutableOwnedFlowUtils};
 use flow_ref::FlowRef;
@@ -713,7 +714,10 @@ impl LayoutTask {
         let requested_node: OpaqueNode = OpaqueNodeMethods::from_script_node(requested_node);
         let mut iterator = UnioningFragmentBorderBoxIterator::new(requested_node);
         sequential::iterate_through_flow_tree_fragment_border_boxes(layout_root, &mut iterator);
-        rw_data.content_box_response = iterator.rect;
+        rw_data.content_box_response = match iterator.rect {
+            Some(rect) => rect,
+            None       => Rect::zero()
+        };
     }
 
     fn process_content_boxes_request<'a>(&'a self,
@@ -1158,25 +1162,28 @@ impl LayoutRPC for LayoutRPCImpl {
 
 struct UnioningFragmentBorderBoxIterator {
     node_address: OpaqueNode,
-    rect: Rect<Au>,
+    rect: Option<Rect<Au>>,
 }
 
 impl UnioningFragmentBorderBoxIterator {
     fn new(node_address: OpaqueNode) -> UnioningFragmentBorderBoxIterator {
         UnioningFragmentBorderBoxIterator {
             node_address: node_address,
-            rect: Rect::zero(),
+            rect: None
         }
     }
 }
 
 impl FragmentBorderBoxIterator for UnioningFragmentBorderBoxIterator {
     fn process(&mut self, _: &Fragment, border_box: &Rect<Au>) {
-        self.rect = if self.rect.is_empty() {
-            *border_box
-        } else {
-            self.rect.union(border_box)
-        }
+        self.rect = match self.rect {
+            Some(rect) => {
+                Some(rect.union(border_box))
+            }
+            None => {
+                Some(*border_box)
+            }
+        };
     }
 
     fn should_process(&mut self, fragment: &Fragment) -> bool {

servo/components/script/dom/activation.rs

@@ -27,7 +27,7 @@ pub trait Activatable : Copy {
     fn canceled_activation(&self);
 
     // https://html.spec.whatwg.org/multipage/interaction.html#run-post-click-activation-steps
-    fn activation_behavior(&self);
+    fn activation_behavior(&self, event: JSRef<Event>, target: JSRef<EventTarget>);
 
     // https://html.spec.whatwg.org/multipage/forms.html#implicit-submission
     fn implicit_submission(&self, ctrlKey: bool, shiftKey: bool, altKey: bool, metaKey: bool);
@@ -60,7 +60,7 @@ pub trait Activatable : Copy {
             self.canceled_activation();
         } else {
             // post click activation
-            self.activation_behavior();
+            self.activation_behavior(event, target);
         }
 
         // Step 6

servo/components/script/dom/element.rs

@@ -1675,7 +1675,7 @@ impl<'a> ActivationElementHelpers<'a> for JSRef<'a, Element> {
                     event.fire(target);
                     if !event.DefaultPrevented() {
                         // post click activation
-                        elem.activation_behavior();
+                        elem.activation_behavior(event, target);
                     } else {
                         elem.canceled_activation();
                     }

servo/components/script/dom/htmlanchorelement.rs

@@ -2,14 +2,17 @@
  * 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::activation::Activatable;
 use dom::attr::AttrValue;
 use dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
 use dom::bindings::codegen::Bindings::HTMLAnchorElementBinding;
 use dom::bindings::codegen::Bindings::HTMLAnchorElementBinding::HTMLAnchorElementMethods;
+use dom::bindings::codegen::Bindings::MouseEventBinding::MouseEventMethods;
 use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
-use dom::bindings::codegen::InheritTypes::HTMLAnchorElementDerived;
-use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast, NodeCast};
+use dom::bindings::codegen::InheritTypes::{HTMLAnchorElementDerived, HTMLImageElementDerived};
+use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast};
+use dom::bindings::codegen::InheritTypes::{MouseEventCast, NodeCast};
 use dom::bindings::js::{MutNullableJS, JSRef, Temporary, OptionalRootable};
 use dom::document::{Document, DocumentHelpers};
 use dom::domtokenlist::DOMTokenList;
@@ -17,10 +20,12 @@ use dom::element::{Element, AttributeHandlers, ElementTypeId};
 use dom::event::Event;
 use dom::eventtarget::{EventTarget, EventTargetTypeId};
 use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
-use dom::node::{Node, NodeHelpers, NodeTypeId, document_from_node};
+use dom::node::{Node, NodeHelpers, NodeTypeId, document_from_node, window_from_node};
 use dom::virtualmethods::VirtualMethods;
+use dom::window::WindowHelpers;
 
 use std::default::Default;
+use std::num::ToPrimitive;
 use string_cache::Atom;
 use util::str::DOMString;
 
@@ -112,20 +117,35 @@ impl<'a> Activatable for JSRef<'a, HTMLAnchorElement> {
     }
 
     //https://html.spec.whatwg.org/multipage/semantics.html#the-a-element:activation-behaviour
-    fn activation_behavior(&self) {
+    fn activation_behavior(&self, event: JSRef<Event>, target: JSRef<EventTarget>) {
         //Step 1. If the node document is not fully active, abort.
         let doc = document_from_node(*self).root();
         if !doc.r().is_fully_active() {
             return;
         }
         //TODO: Step 2. Check if browsing context is specified and act accordingly.
-        //TODO: Step 3. Handle <img ismap/>.
-        //TODO: Step 4. Download the link is `download` attribute is set.
+        //Step 3. Handle <img ismap/>.
         let element: JSRef<Element> = ElementCast::from_ref(*self);
+        let mouse_event = MouseEventCast::to_ref(event).unwrap();
+        let mut ismap_suffix = None;
+        if let Some(element) = ElementCast::to_ref(target) {
+            if target.is_htmlimageelement() && element.has_attribute(&atom!("ismap")) {
+
+                let target_node = NodeCast::to_ref(target).unwrap();
+                let rect = window_from_node(target_node).root().r().content_box_query(target_node.to_trusted_node_address());
+                ismap_suffix = Some(
+                    format!("?{},{}", mouse_event.ClientX().to_f32().unwrap() - rect.origin.x.to_frac32_px(),
+                                      mouse_event.ClientY().to_f32().unwrap() - rect.origin.y.to_frac32_px())
+                )
+            }
+        }
+
+        //TODO: Step 4. Download the link is `download` attribute is set.
+
         let attr = element.get_attribute(&ns!(""), &atom!("href")).root();
         match attr {
             Some(ref href) => {
-                let value = href.r().Value();
+                let value = href.r().Value() + ismap_suffix.as_ref().map(|s| &**s).unwrap_or("");
                 debug!("clicked on link to {}", value);
                 doc.r().load_anchor_href(value);
             }

servo/components/script/dom/htmlbuttonelement.rs

@@ -13,6 +13,7 @@ use dom::bindings::js::{JSRef, Temporary};
 use dom::document::Document;
 use dom::element::{AttributeHandlers, Element, ElementTypeId};
 use dom::element::ActivationElementHelpers;
+use dom::event::Event;
 use dom::eventtarget::{EventTarget, EventTargetTypeId};
 use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
 use dom::htmlformelement::{FormSubmitter, FormControl, HTMLFormElementHelpers};
@@ -196,7 +197,7 @@ impl<'a> Activatable for JSRef<'a, HTMLButtonElement> {
     }
 
     // https://html.spec.whatwg.org/multipage/interaction.html#run-post-click-activation-steps
-    fn activation_behavior(&self) {
+    fn activation_behavior(&self, _event: JSRef<Event>, _target: JSRef<EventTarget>) {
         let ty = self.button_type.get();
         match ty {
             //https://html.spec.whatwg.org/multipage/forms.html#attr-button-type-submit-state

servo/components/script/dom/htmlinputelement.rs

@@ -753,7 +753,7 @@ impl<'a> Activatable for JSRef<'a, HTMLInputElement> {
     }
 
     // https://html.spec.whatwg.org/multipage/interaction.html#run-post-click-activation-steps
-    fn activation_behavior(&self) {
+    fn activation_behavior(&self, _event: JSRef<Event>, _target: JSRef<EventTarget>) {
         let ty = self.input_type.get();
         if self.activation_state.borrow().old_type != ty {
             // Type changed, abandon ship

servo/tests/html/test_img_ismap.html

@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>img element ismap activation test</title>
+  </head>
+  <body>
+    <p>Click my nose to get the coordinates!</p>
+    <a href="test_img_ismap.html">
+      <img src="andreas.jpeg" alt="andreas" ismap/>
+    </a>
+    <p>Nothing happends if you click my nose</p>
+    <a href="test_img_ismap.html">
+      <img src="andreas.jpeg" alt="andreas"/>
+    </a>
+  </body>
+</html>