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LibMarkdown: Implement introspection of the document tree

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This commit is contained in:
Ben Wiederhake 2021-09-10 21:36:29 +02:00 • committed by Brian Gianforcaro
parent aca01932bd
commit 24e7196158
23 changed files with 319 additions and 0 deletions
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75
Userland/Libraries/LibMarkdown/Text.cpp
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@ -9,6 +9,7 @@
#include <AK/ScopeGuard.h>
#include <AK/StringBuilder.h>
#include <LibMarkdown/Text.h>
#include <LibMarkdown/Visitor.h>
#include <ctype.h>
#include <string.h>
@ -39,6 +40,15 @@ size_t Text::EmphasisNode::terminal_length() const
return child->terminal_length();
}
RecursionDecision Text::EmphasisNode::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
return child->walk(visitor);
}
void Text::CodeNode::render_to_html(StringBuilder& builder) const
{
builder.append("<code>");
@ -58,6 +68,15 @@ size_t Text::CodeNode::terminal_length() const
return code->terminal_length();
}
RecursionDecision Text::CodeNode::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
return code->walk(visitor);
}
void Text::BreakNode::render_to_html(StringBuilder& builder) const
{
builder.append("<br />");
@ -72,6 +91,15 @@ size_t Text::BreakNode::terminal_length() const
return 0;
}
RecursionDecision Text::BreakNode::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
// Normalize return value
return RecursionDecision::Continue;
}
void Text::TextNode::render_to_html(StringBuilder& builder) const
{
builder.append(escape_html_entities(text));
@ -95,6 +123,18 @@ size_t Text::TextNode::terminal_length() const
return text.length();
}
RecursionDecision Text::TextNode::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
rd = visitor.visit(text);
if (rd != RecursionDecision::Recurse)
return rd;
// Normalize return value
return RecursionDecision::Continue;
}
void Text::LinkNode::render_to_html(StringBuilder& builder) const
{
if (is_image) {
@ -134,6 +174,17 @@ size_t Text::LinkNode::terminal_length() const
return text->terminal_length();
}
RecursionDecision Text::LinkNode::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
// Don't recurse on href.
return text->walk(visitor);
}
void Text::MultiNode::render_to_html(StringBuilder& builder) const
{
for (auto& child : children) {
@ -157,6 +208,21 @@ size_t Text::MultiNode::terminal_length() const
return length;
}
RecursionDecision Text::MultiNode::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
for (auto const& child : children) {
rd = child.walk(visitor);
if (rd == RecursionDecision::Break)
return rd;
}
return RecursionDecision::Continue;
}
size_t Text::terminal_length() const
{
return m_node->terminal_length();
@ -176,6 +242,15 @@ String Text::render_for_terminal() const
return builder.build().trim(" \n\t");
}
RecursionDecision Text::walk(Visitor& visitor) const
{
RecursionDecision rd = visitor.visit(*this);
if (rd != RecursionDecision::Recurse)
return rd;
return m_node->walk(visitor);
}
Text Text::parse(StringView const& str)
{
Text text;