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LibWeb: Only allow editing of elements with contenteditable="true"

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We now respect the contenteditable HTML attribute and only let you
edit content inside explicitly editable elements.
This commit is contained in:
Andreas Kling 2020-08-02 16:05:59 +02:00
parent 8b16c61ff8
commit 07e13e9868
Notes: sideshowbarker 2024-07-19 04:23:09 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/07e13e9868b
9 changed files with 107 additions and 70 deletions
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2
Base/res/html/misc/welcome.html
View File

@ -1,5 +1,5 @@
<!DOCTYPE html>
<html>
<html contenteditable="true">
<head>
<title>Welcome!</title>
<!-- this is a comment -->

91
Libraries/LibWeb/DOM/AttributeNames.h
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@ -34,51 +34,52 @@ namespace AttributeNames {
void initialize();
#define ENUMERATE_HTML_ATTRIBUTES \
__ENUMERATE_HTML_ATTRIBUTE(abbr) \
__ENUMERATE_HTML_ATTRIBUTE(accept) \
__ENUMERATE_HTML_ATTRIBUTE(action) \
__ENUMERATE_HTML_ATTRIBUTE(align) \
__ENUMERATE_HTML_ATTRIBUTE(allow) \
__ENUMERATE_HTML_ATTRIBUTE(alt) \
__ENUMERATE_HTML_ATTRIBUTE(async) \
__ENUMERATE_HTML_ATTRIBUTE(bgcolor) \
__ENUMERATE_HTML_ATTRIBUTE(class_) \
__ENUMERATE_HTML_ATTRIBUTE(colspan) \
__ENUMERATE_HTML_ATTRIBUTE(data) \
__ENUMERATE_HTML_ATTRIBUTE(download) \
__ENUMERATE_HTML_ATTRIBUTE(defer) \
__ENUMERATE_HTML_ATTRIBUTE(dirname) \
__ENUMERATE_HTML_ATTRIBUTE(headers) \
__ENUMERATE_HTML_ATTRIBUTE(height) \
__ENUMERATE_HTML_ATTRIBUTE(href) \
__ENUMERATE_HTML_ATTRIBUTE(hreflang) \
__ENUMERATE_HTML_ATTRIBUTE(id) \
__ENUMERATE_HTML_ATTRIBUTE(imagesizes) \
__ENUMERATE_HTML_ATTRIBUTE(imagesrcset) \
__ENUMERATE_HTML_ATTRIBUTE(integrity) \
__ENUMERATE_HTML_ATTRIBUTE(lang) \
__ENUMERATE_HTML_ATTRIBUTE(max) \
__ENUMERATE_HTML_ATTRIBUTE(media) \
__ENUMERATE_HTML_ATTRIBUTE(method) \
__ENUMERATE_HTML_ATTRIBUTE(min) \
__ENUMERATE_HTML_ATTRIBUTE(name) \
__ENUMERATE_HTML_ATTRIBUTE(pattern) \
__ENUMERATE_HTML_ATTRIBUTE(ping) \
__ENUMERATE_HTML_ATTRIBUTE(placeholder) \
__ENUMERATE_HTML_ATTRIBUTE(rel) \
__ENUMERATE_HTML_ATTRIBUTE(size) \
__ENUMERATE_HTML_ATTRIBUTE(sizes) \
__ENUMERATE_HTML_ATTRIBUTE(src) \
__ENUMERATE_HTML_ATTRIBUTE(srcdoc) \
__ENUMERATE_HTML_ATTRIBUTE(srcset) \
__ENUMERATE_HTML_ATTRIBUTE(step) \
__ENUMERATE_HTML_ATTRIBUTE(style) \
__ENUMERATE_HTML_ATTRIBUTE(target) \
__ENUMERATE_HTML_ATTRIBUTE(title) \
__ENUMERATE_HTML_ATTRIBUTE(type) \
__ENUMERATE_HTML_ATTRIBUTE(usemap) \
__ENUMERATE_HTML_ATTRIBUTE(value) \
#define ENUMERATE_HTML_ATTRIBUTES \
__ENUMERATE_HTML_ATTRIBUTE(abbr) \
__ENUMERATE_HTML_ATTRIBUTE(accept) \
__ENUMERATE_HTML_ATTRIBUTE(action) \
__ENUMERATE_HTML_ATTRIBUTE(align) \
__ENUMERATE_HTML_ATTRIBUTE(allow) \
__ENUMERATE_HTML_ATTRIBUTE(alt) \
__ENUMERATE_HTML_ATTRIBUTE(async) \
__ENUMERATE_HTML_ATTRIBUTE(bgcolor) \
__ENUMERATE_HTML_ATTRIBUTE(class_) \
__ENUMERATE_HTML_ATTRIBUTE(colspan) \
__ENUMERATE_HTML_ATTRIBUTE(contenteditable) \
__ENUMERATE_HTML_ATTRIBUTE(data) \
__ENUMERATE_HTML_ATTRIBUTE(download) \
__ENUMERATE_HTML_ATTRIBUTE(defer) \
__ENUMERATE_HTML_ATTRIBUTE(dirname) \
__ENUMERATE_HTML_ATTRIBUTE(headers) \
__ENUMERATE_HTML_ATTRIBUTE(height) \
__ENUMERATE_HTML_ATTRIBUTE(href) \
__ENUMERATE_HTML_ATTRIBUTE(hreflang) \
__ENUMERATE_HTML_ATTRIBUTE(id) \
__ENUMERATE_HTML_ATTRIBUTE(imagesizes) \
__ENUMERATE_HTML_ATTRIBUTE(imagesrcset) \
__ENUMERATE_HTML_ATTRIBUTE(integrity) \
__ENUMERATE_HTML_ATTRIBUTE(lang) \
__ENUMERATE_HTML_ATTRIBUTE(max) \
__ENUMERATE_HTML_ATTRIBUTE(media) \
__ENUMERATE_HTML_ATTRIBUTE(method) \
__ENUMERATE_HTML_ATTRIBUTE(min) \
__ENUMERATE_HTML_ATTRIBUTE(name) \
__ENUMERATE_HTML_ATTRIBUTE(pattern) \
__ENUMERATE_HTML_ATTRIBUTE(ping) \
__ENUMERATE_HTML_ATTRIBUTE(placeholder) \
__ENUMERATE_HTML_ATTRIBUTE(rel) \
__ENUMERATE_HTML_ATTRIBUTE(size) \
__ENUMERATE_HTML_ATTRIBUTE(sizes) \
__ENUMERATE_HTML_ATTRIBUTE(src) \
__ENUMERATE_HTML_ATTRIBUTE(srcdoc) \
__ENUMERATE_HTML_ATTRIBUTE(srcset) \
__ENUMERATE_HTML_ATTRIBUTE(step) \
__ENUMERATE_HTML_ATTRIBUTE(style) \
__ENUMERATE_HTML_ATTRIBUTE(target) \
__ENUMERATE_HTML_ATTRIBUTE(title) \
__ENUMERATE_HTML_ATTRIBUTE(type) \
__ENUMERATE_HTML_ATTRIBUTE(usemap) \
__ENUMERATE_HTML_ATTRIBUTE(value) \
__ENUMERATE_HTML_ATTRIBUTE(width)
#define __ENUMERATE_HTML_ATTRIBUTE(name) extern FlyString name;

4
Libraries/LibWeb/DOM/Document.h
View File

@ -157,6 +157,9 @@ public:
const DocumentType* doctype() const;
const String& compat_mode() const;
void set_editable(bool editable) { m_editable = editable; }
virtual bool is_editable() const final;
private:
virtual RefPtr<LayoutNode> create_layout_node(const CSS::StyleProperties* parent_style) override;
@ -186,6 +189,7 @@ private:
NonnullRefPtrVector<HTML::HTMLScriptElement> m_scripts_to_execute_as_soon_as_possible;
QuirksMode m_quirks_mode { QuirksMode::No };
bool m_editable { false };
};
}

18
Libraries/LibWeb/DOM/Element.cpp
View File

@ -290,4 +290,22 @@ String Element::inner_html() const
return builder.to_string();
}
bool Element::is_editable() const
{
auto contenteditable = attribute(HTML::AttributeNames::contenteditable);
// "true" and the empty string map to the "true" state.
if ((!contenteditable.is_null() && contenteditable.is_empty()) || contenteditable.equals_ignoring_case("true"))
return true;
// "false" maps to the "false" state.
if (contenteditable.equals_ignoring_case("false"))
return false;
// "inherit", an invalid value, and a missing value all map to the "inherit" state.
return parent() && parent()->is_editable();
}
bool Document::is_editable() const
{
return m_editable;
}
}

2
Libraries/LibWeb/DOM/Element.h
View File

@ -82,6 +82,8 @@ public:
String inner_html() const;
void set_inner_html(StringView);
virtual bool is_editable() const final;
protected:
RefPtr<LayoutNode> create_layout_node(const CSS::StyleProperties* parent_style) override;

5
Libraries/LibWeb/DOM/Node.cpp
View File

@ -217,4 +217,9 @@ void Node::set_document(Badge<Document>, Document& document)
m_document = &document;
}
bool Node::is_editable() const
{
return parent() && parent()->is_editable();
}
}

2
Libraries/LibWeb/DOM/Node.h
View File

@ -75,6 +75,8 @@ public:
bool is_parent_node() const { return is_element() || is_document() || is_document_fragment(); }
virtual bool is_svg_element() const { return false; }
virtual bool is_editable() const;
RefPtr<Node> append_child(NonnullRefPtr<Node>, bool notify = true);
RefPtr<Node> insert_before(NonnullRefPtr<Node> node, RefPtr<Node> child, bool notify = true);

3
Libraries/LibWeb/Layout/LayoutText.cpp
View File

@ -117,6 +117,9 @@ void LayoutText::paint_cursor_if_needed(PaintContext& context, const LineBoxFrag
if (!(frame().cursor_position().offset() >= (unsigned)fragment.start() && frame().cursor_position().offset() < (unsigned)(fragment.start() + fragment.length())))
return;
if (!fragment.layout_node().node() || !fragment.layout_node().node()->is_editable())
return;
auto fragment_rect = fragment.absolute_rect();
float cursor_x = fragment_rect.x() + specified_style().font().width(fragment.text().substring_view(0, frame().cursor_position().offset() - fragment.start()));

50
Libraries/LibWeb/Page/EventHandler.cpp
View File

@ -231,31 +231,33 @@ void EventHandler::dump_selection(const char* event_name) const
bool EventHandler::handle_keydown(KeyCode key, unsigned, u32 code_point)
{
// FIXME: Support backspacing across DOM node boundaries.
if (key == KeyCode::Key_Backspace && m_frame.cursor_position().offset() > 0) {
auto& text_node = downcast<DOM::Text>(*m_frame.cursor_position().node());
StringBuilder builder;
builder.append(text_node.data().substring_view(0, m_frame.cursor_position().offset() - 1));
builder.append(text_node.data().substring_view(m_frame.cursor_position().offset(), text_node.data().length() - m_frame.cursor_position().offset()));
text_node.set_data(builder.to_string());
m_frame.set_cursor_position({ *m_frame.cursor_position().node(), m_frame.cursor_position().offset() - 1 });
// FIXME: This should definitely use incremental layout invalidation instead!
text_node.document().force_layout();
return true;
}
if (m_frame.cursor_position().node() && m_frame.cursor_position().node()->is_editable()) {
// FIXME: Support backspacing across DOM node boundaries.
if (key == KeyCode::Key_Backspace && m_frame.cursor_position().offset() > 0) {
auto& text_node = downcast<DOM::Text>(*m_frame.cursor_position().node());
StringBuilder builder;
builder.append(text_node.data().substring_view(0, m_frame.cursor_position().offset() - 1));
builder.append(text_node.data().substring_view(m_frame.cursor_position().offset(), text_node.data().length() - m_frame.cursor_position().offset()));
text_node.set_data(builder.to_string());
m_frame.set_cursor_position({ *m_frame.cursor_position().node(), m_frame.cursor_position().offset() - 1 });
// FIXME: This should definitely use incremental layout invalidation instead!
text_node.document().force_layout();
return true;
}
if (code_point && m_frame.cursor_position().is_valid() && is<DOM::Text>(*m_frame.cursor_position().node())) {
auto& text_node = downcast<DOM::Text>(*m_frame.cursor_position().node());
StringBuilder builder;
builder.append(text_node.data().substring_view(0, m_frame.cursor_position().offset()));
builder.append_codepoint(code_point);
builder.append(text_node.data().substring_view(m_frame.cursor_position().offset(), text_node.data().length() - m_frame.cursor_position().offset()));
text_node.set_data(builder.to_string());
// FIXME: This will advance the cursor incorrectly when inserting multiple whitespaces (DOM vs layout whitespace collapse difference.)
m_frame.set_cursor_position({ *m_frame.cursor_position().node(), m_frame.cursor_position().offset() + 1 });
// FIXME: This should definitely use incremental layout invalidation instead!
text_node.document().force_layout();
return true;
if (code_point && m_frame.cursor_position().is_valid() && is<DOM::Text>(*m_frame.cursor_position().node())) {
auto& text_node = downcast<DOM::Text>(*m_frame.cursor_position().node());
StringBuilder builder;
builder.append(text_node.data().substring_view(0, m_frame.cursor_position().offset()));
builder.append_codepoint(code_point);
builder.append(text_node.data().substring_view(m_frame.cursor_position().offset(), text_node.data().length() - m_frame.cursor_position().offset()));
text_node.set_data(builder.to_string());
// FIXME: This will advance the cursor incorrectly when inserting multiple whitespaces (DOM vs layout whitespace collapse difference.)
m_frame.set_cursor_position({ *m_frame.cursor_position().node(), m_frame.cursor_position().offset() + 1 });
// FIXME: This should definitely use incremental layout invalidation instead!
text_node.document().force_layout();
return true;
}
}
return false;
}