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LibHTML: Add a way to get a Document's title

You can now query Document::title() to get a String containing whatever
is inside the document's <title> tag.

In support of this, this patch adds the <html>, <head> and <title>
elements.
Andreas Kling há 5 anos atrás
pai
0c6af2d5b4
commit
b94c7665a9
12 ficheiros alterados com 116 adições e 1 exclusões
Visão Dividida Mostrar Estatísticas Diff
  1. 29 0
      Libraries/LibHTML/DOM/Document.cpp
  2. 8 1
      Libraries/LibHTML/DOM/Document.h
  3. 10 0
      Libraries/LibHTML/DOM/HTMLHeadElement.cpp
  4. 9 0
      Libraries/LibHTML/DOM/HTMLHeadElement.h
  5. 10 0
      Libraries/LibHTML/DOM/HTMLHtmlElement.cpp
  6. 9 0
      Libraries/LibHTML/DOM/HTMLHtmlElement.h
  7. 10 0
      Libraries/LibHTML/DOM/HTMLTitleElement.cpp
  8. 9 0
      Libraries/LibHTML/DOM/HTMLTitleElement.h
  9. 9 0
      Libraries/LibHTML/DOM/Node.h
  10. 1 0
      Libraries/LibHTML/HtmlView.h
  11. 3 0
      Libraries/LibHTML/Makefile.shared
  12. 9 0
      Libraries/LibHTML/Parser/HTMLParser.cpp

+ 29 - 0
Libraries/LibHTML/DOM/Document.cpp
Ver Ficheiro 

@@ -1,6 +1,9 @@
 
 #include <LibHTML/CSS/StyleResolver.h>
 
 #include <LibHTML/DOM/Document.h>
 
 #include <LibHTML/DOM/Element.h>
 
+#include <LibHTML/DOM/HTMLHeadElement.h>
 
+#include <LibHTML/DOM/HTMLHtmlElement.h>
 
+#include <LibHTML/DOM/HTMLTitleElement.h>
 
 #include <LibHTML/Layout/LayoutDocument.h>
 
 #include <stdio.h>
 
 
@@ -34,3 +37,29 @@ void Document::normalize()
 
     this->donate_all_children_to(body);
 
     this->append_child(html);
 
 }
 
+
 
+const HTMLHtmlElement* Document::document_element() const
 
+{
 
+    return static_cast<const HTMLHtmlElement*>(first_child_with_tag_name("html"));
 
+}
 
+
 
+const HTMLHeadElement* Document::head() const
 
+{
 
+    auto* html = document_element();
 
+    if (!html)
 
+        return nullptr;
 
+    return static_cast<const HTMLHeadElement*>(html->first_child_with_tag_name("head"));
 
+}
 
+
 
+String Document::title() const
 
+{
 
+    auto* head_element = head();
 
+    if (!head_element)
 
+        return {};
 
+
 
+    auto* title_element = static_cast<const HTMLTitleElement*>(head_element->first_child_with_tag_name("title"));
 
+    if (!title_element)
 
+        return {};
 
+
 
+    return title_element->text_content();
 
+}

+ 8 - 1
Libraries/LibHTML/DOM/Document.h
Ver Ficheiro 

@@ -1,12 +1,14 @@
 
 #pragma once
 
 
-#include <AK/String.h>
 
 #include <AK/NonnullRefPtrVector.h>
 
 #include <AK/OwnPtr.h>
 
+#include <AK/String.h>
 
 #include <LibHTML/CSS/StyleResolver.h>
 
 #include <LibHTML/CSS/StyleSheet.h>
 
 #include <LibHTML/DOM/ParentNode.h>
 
 
+class HTMLHtmlElement;
 
+class HTMLHeadElement;
 
 class LayoutNode;
 
 class StyleResolver;
 
 class StyleSheet;
 
@@ -29,6 +31,11 @@ public:
 
     Node* hovered_node() { return m_hovered_node; }
 
     const Node* hovered_node() const { return m_hovered_node; }
 
 
+    const HTMLHtmlElement* document_element() const;
 
+    const HTMLHeadElement* head() const;
 
+
 
+    String title() const;
 
+
 
 private:
 
     OwnPtr<StyleResolver> m_style_resolver;
 
     NonnullRefPtrVector<StyleSheet> m_sheets;

+ 10 - 0
Libraries/LibHTML/DOM/HTMLHeadElement.cpp
Ver Ficheiro 

@@ -0,0 +1,10 @@
 
+#include <LibHTML/DOM/HTMLHeadElement.h>
 
+
 
+HTMLHeadElement::HTMLHeadElement(Document& document, const String& tag_name)
 
+    : HTMLElement(document, tag_name)
 
+{
 
+}
 
+
 
+HTMLHeadElement::~HTMLHeadElement()
 
+{
 
+}

+ 9 - 0
Libraries/LibHTML/DOM/HTMLHeadElement.h
Ver Ficheiro 

@@ -0,0 +1,9 @@
 
+#pragma once
 
+
 
+#include <LibHTML/DOM/HTMLElement.h>
 
+
 
+class HTMLHeadElement : public HTMLElement {
 
+public:
 
+    HTMLHeadElement(Document&, const String& tag_name);
 
+    virtual ~HTMLHeadElement() override;
 
+};

+ 10 - 0
Libraries/LibHTML/DOM/HTMLHtmlElement.cpp
Ver Ficheiro 

@@ -0,0 +1,10 @@
 
+#include <LibHTML/DOM/HTMLHtmlElement.h>
 
+
 
+HTMLHtmlElement::HTMLHtmlElement(Document& document, const String& tag_name)
 
+    : HTMLElement(document, tag_name)
 
+{
 
+}
 
+
 
+HTMLHtmlElement::~HTMLHtmlElement()
 
+{
 
+}

+ 9 - 0
Libraries/LibHTML/DOM/HTMLHtmlElement.h
Ver Ficheiro 

@@ -0,0 +1,9 @@
 
+#pragma once
 
+
 
+#include <LibHTML/DOM/HTMLElement.h>
 
+
 
+class HTMLHtmlElement : public HTMLElement {
 
+public:
 
+    HTMLHtmlElement(Document&, const String& tag_name);
 
+    virtual ~HTMLHtmlElement() override;
 
+};

+ 10 - 0
Libraries/LibHTML/DOM/HTMLTitleElement.cpp
Ver Ficheiro 

@@ -0,0 +1,10 @@
 
+#include <LibHTML/DOM/HTMLTitleElement.h>
 
+
 
+HTMLTitleElement::HTMLTitleElement(Document& document, const String& tag_name)
 
+    : HTMLElement(document, tag_name)
 
+{
 
+}
 
+
 
+HTMLTitleElement::~HTMLTitleElement()
 
+{
 
+}

+ 9 - 0
Libraries/LibHTML/DOM/HTMLTitleElement.h
Ver Ficheiro 

@@ -0,0 +1,9 @@
 
+#pragma once
 
+
 
+#include <LibHTML/DOM/HTMLElement.h>
 
+
 
+class HTMLTitleElement : public HTMLElement {
 
+public:
 
+    HTMLTitleElement(Document&, const String& tag_name);
 
+    virtual ~HTMLTitleElement() override;
 
+};

+ 9 - 0
Libraries/LibHTML/DOM/Node.h
Ver Ficheiro 

@@ -46,6 +46,15 @@ public:
 
 
     virtual bool is_html_element() const { return false; }
 
 
+    const Node* first_child_with_tag_name(const StringView& tag_name) const
 
+    {
 
+        for (auto* child = first_child(); child; child = child->next_sibling()) {
 
+            if (child->tag_name() == tag_name)
 
+                return child;
 
+        }
 
+        return nullptr;
 
+    }
 
+
 
 protected:
 
     Node(Document&, NodeType);

+ 1 - 0
Libraries/LibHTML/HtmlView.h
Ver Ficheiro 

@@ -13,6 +13,7 @@ public:
 
     void set_document(Document*);
 
 
     Function<void(const String&)> on_link_click;
 
+    Function<void(const String&)> on_title_change;
 
 
 protected:
 
     HtmlView(GWidget* parent = nullptr);

+ 3 - 0
Libraries/LibHTML/Makefile.shared
Ver Ficheiro 

@@ -5,6 +5,9 @@ LIBHTML_OBJS = \
 
     DOM/HTMLElement.o \
 
     DOM/HTMLAnchorElement.o \
 
     DOM/HTMLHeadingElement.o \
 
+    DOM/HTMLHeadElement.o \
 
+    DOM/HTMLHtmlElement.o \
 
+    DOM/HTMLTitleElement.o \
 
     DOM/Document.o \
 
     DOM/Text.o \
 
     CSS/Selector.o \

+ 9 - 0
Libraries/LibHTML/Parser/HTMLParser.cpp
Ver Ficheiro 

@@ -2,7 +2,10 @@
 
 #include <AK/StringBuilder.h>
 
 #include <LibHTML/DOM/Element.h>
 
 #include <LibHTML/DOM/HTMLAnchorElement.h>
 
+#include <LibHTML/DOM/HTMLHeadElement.h>
 
 #include <LibHTML/DOM/HTMLHeadingElement.h>
 
+#include <LibHTML/DOM/HTMLHtmlElement.h>
 
+#include <LibHTML/DOM/HTMLTitleElement.h>
 
 #include <LibHTML/DOM/Text.h>
 
 #include <LibHTML/Parser/HTMLParser.h>
 
 #include <ctype.h>
 
@@ -13,6 +16,12 @@ static NonnullRefPtr<Element> create_element(Document& document, const String& t
 
     auto lowercase_tag_name = tag_name.to_lowercase();
 
     if (lowercase_tag_name == "a")
 
         return adopt(*new HTMLAnchorElement(document, tag_name));
 
+    if (lowercase_tag_name == "html")
 
+        return adopt(*new HTMLHtmlElement(document, tag_name));
 
+    if (lowercase_tag_name == "head")
 
+        return adopt(*new HTMLHeadElement(document, tag_name));
 
+    if (lowercase_tag_name == "title")
 
+        return adopt(*new HTMLTitleElement(document, tag_name));
 
     if (lowercase_tag_name == "h1"
 
         || lowercase_tag_name == "h2"
 
         || lowercase_tag_name == "h3"

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