mirror of
https://github.com/RGBCube/serenity
synced 2025-07-27 06:47:35 +00:00
LibMarkdown: Implement introspection of the document tree
This commit is contained in:
parent
aca01932bd
commit
24e7196158
23 changed files with 319 additions and 0 deletions
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@ -6,8 +6,10 @@
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#pragma once
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#include <AK/RecursionDecision.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <LibMarkdown/Forward.h>
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namespace Markdown {
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@ -17,6 +19,7 @@ public:
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virtual String render_to_html(bool tight = false) const = 0;
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virtual String render_for_terminal(size_t view_width = 0) const = 0;
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virtual RecursionDecision walk(Visitor&) const = 0;
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};
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}
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@ -6,6 +6,7 @@
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/BlockQuote.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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@ -24,6 +25,15 @@ String BlockQuote::render_for_terminal(size_t view_width) const
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return m_contents->render_for_terminal(view_width);
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}
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RecursionDecision BlockQuote::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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return m_contents->walk(visitor);
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}
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OwnPtr<BlockQuote> BlockQuote::parse(LineIterator& lines)
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{
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lines.push_context(LineIterator::Context::block_quote());
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@ -22,6 +22,7 @@ public:
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<BlockQuote> parse(LineIterator& lines);
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@ -7,6 +7,7 @@
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#include <AK/StringBuilder.h>
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#include <LibJS/MarkupGenerator.h>
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#include <LibMarkdown/CodeBlock.h>
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#include <LibMarkdown/Visitor.h>
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#include <LibRegex/Regex.h>
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namespace Markdown {
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@ -54,6 +55,22 @@ String CodeBlock::render_for_terminal(size_t) const
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return builder.build();
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}
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RecursionDecision CodeBlock::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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rd = visitor.visit(m_code);
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if (rd != RecursionDecision::Recurse)
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return rd;
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// Don't recurse on m_language and m_style.
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// Normalize return value.
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return RecursionDecision::Continue;
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}
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static Regex<ECMA262> style_spec_re("\\s*([\\*_]*)\\s*([^\\*_\\s]*).*");
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OwnPtr<CodeBlock> CodeBlock::parse(LineIterator& lines)
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@ -25,6 +25,7 @@ public:
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<CodeBlock> parse(LineIterator& lines);
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private:
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@ -12,6 +12,7 @@
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#include <LibMarkdown/List.h>
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#include <LibMarkdown/Paragraph.h>
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#include <LibMarkdown/Table.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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@ -50,6 +51,21 @@ String ContainerBlock::render_for_terminal(size_t view_width) const
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return builder.build();
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}
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RecursionDecision ContainerBlock::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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for (auto const& block : m_blocks) {
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rd = block.walk(visitor);
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if (rd == RecursionDecision::Break)
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return rd;
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}
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return RecursionDecision::Continue;
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}
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template<typename BlockType>
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static bool try_parse_block(LineIterator& lines, NonnullOwnPtrVector<Block>& blocks)
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{
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@ -27,6 +27,7 @@ public:
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<ContainerBlock> parse(LineIterator& lines);
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@ -8,6 +8,7 @@
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/Document.h>
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#include <LibMarkdown/LineIterator.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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@ -41,6 +42,15 @@ String Document::render_for_terminal(size_t view_width) const
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return m_container->render_for_terminal(view_width);
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}
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RecursionDecision Document::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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return m_container->walk(visitor);
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}
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OwnPtr<Document> Document::parse(const StringView& str)
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{
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const Vector<StringView> lines_vec = str.lines();
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@ -23,6 +23,17 @@ public:
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String render_to_inline_html() const;
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String render_for_terminal(size_t view_width = 0) const;
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/*
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* Walk recursively through the document tree. Returning `RecursionDecision::Recurse` from
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* `Visitor::visit` proceeds with the next element of the pre-order walk, usually a child element.
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* Returning `RecursionDecision::Continue` skips the subtree, and usually proceeds with the next
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* sibling. Returning `RecursionDecision::Break` breaks the recursion, with no further calls to
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* any of the `Visitor::visit` methods.
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*
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* Note that `walk()` will only return `RecursionDecision::Continue` or `RecursionDecision::Break`.
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*/
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RecursionDecision walk(Visitor&) const;
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static OwnPtr<Document> parse(const StringView&);
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private:
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26
Userland/Libraries/LibMarkdown/Forward.h
Normal file
26
Userland/Libraries/LibMarkdown/Forward.h
Normal file
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@ -0,0 +1,26 @@
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/*
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* Copyright (c) 2021, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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namespace Markdown {
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class Block;
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class Document;
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class Text;
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class BlockQuote;
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class CodeBlock;
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class ContainerBlock;
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class Heading;
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class HoriziontalRule;
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class List;
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class Paragraph;
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class Table;
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class Visitor;
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}
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@ -6,6 +6,7 @@
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/Heading.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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return builder.build();
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}
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RecursionDecision Heading::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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return m_text.walk(visitor);
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}
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OwnPtr<Heading> Heading::parse(LineIterator& lines)
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{
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if (lines.is_end())
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<Heading> parse(LineIterator& lines);
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private:
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/HorizontalRule.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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return builder.to_string();
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}
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RecursionDecision HorizontalRule::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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// Normalize return value.
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return RecursionDecision::Continue;
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}
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OwnPtr<HorizontalRule> HorizontalRule::parse(LineIterator& lines)
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{
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if (lines.is_end())
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<HorizontalRule> parse(LineIterator& lines);
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};
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/List.h>
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#include <LibMarkdown/Paragraph.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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return builder.build();
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}
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RecursionDecision List::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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for (auto const& block : m_items) {
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rd = block->walk(visitor);
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if (rd == RecursionDecision::Break)
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return rd;
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}
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return RecursionDecision::Continue;
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}
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OwnPtr<List> List::parse(LineIterator& lines)
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{
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Vector<OwnPtr<ContainerBlock>> items;
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<List> parse(LineIterator& lines);
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@ -6,6 +6,7 @@
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/Paragraph.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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return builder.build();
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}
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RecursionDecision Paragraph::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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return m_text.walk(visitor);
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}
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}
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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private:
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Text m_text;
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#include <AK/Debug.h>
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/Table.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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@ -96,6 +97,21 @@ String Table::render_to_html(bool) const
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return builder.to_string();
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}
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RecursionDecision Table::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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for (auto const& column : m_columns) {
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rd = column.walk(visitor);
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if (rd == RecursionDecision::Break)
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return rd;
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}
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return RecursionDecision::Continue;
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}
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OwnPtr<Table> Table::parse(LineIterator& lines)
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{
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auto peek_it = lines;
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return table;
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}
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RecursionDecision Table::Column::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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rd = header.walk(visitor);
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if (rd != RecursionDecision::Recurse)
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return rd;
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for (auto const& row : rows) {
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rd = row.walk(visitor);
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if (rd == RecursionDecision::Break)
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return rd;
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}
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return RecursionDecision::Continue;
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}
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}
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Vector<Text> rows;
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Alignment alignment { Alignment::Left };
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size_t relative_width { 0 };
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RecursionDecision walk(Visitor&) const;
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};
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Table() { }
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virtual String render_to_html(bool tight = false) const override;
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virtual String render_for_terminal(size_t view_width = 0) const override;
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virtual RecursionDecision walk(Visitor&) const override;
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static OwnPtr<Table> parse(LineIterator& lines);
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private:
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#include <AK/ScopeGuard.h>
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/Text.h>
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#include <LibMarkdown/Visitor.h>
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#include <ctype.h>
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#include <string.h>
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@ -39,6 +40,15 @@ size_t Text::EmphasisNode::terminal_length() const
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return child->terminal_length();
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}
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RecursionDecision Text::EmphasisNode::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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return child->walk(visitor);
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}
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void Text::CodeNode::render_to_html(StringBuilder& builder) const
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{
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builder.append("<code>");
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@ -58,6 +68,15 @@ size_t Text::CodeNode::terminal_length() const
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return code->terminal_length();
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}
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RecursionDecision Text::CodeNode::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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return code->walk(visitor);
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}
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void Text::BreakNode::render_to_html(StringBuilder& builder) const
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{
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builder.append("<br />");
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@ -72,6 +91,15 @@ size_t Text::BreakNode::terminal_length() const
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return 0;
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}
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RecursionDecision Text::BreakNode::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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// Normalize return value
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return RecursionDecision::Continue;
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}
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void Text::TextNode::render_to_html(StringBuilder& builder) const
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{
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builder.append(escape_html_entities(text));
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return text.length();
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}
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RecursionDecision Text::TextNode::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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rd = visitor.visit(text);
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if (rd != RecursionDecision::Recurse)
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return rd;
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// Normalize return value
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return RecursionDecision::Continue;
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}
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void Text::LinkNode::render_to_html(StringBuilder& builder) const
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{
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if (is_image) {
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@ -134,6 +174,17 @@ size_t Text::LinkNode::terminal_length() const
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return text->terminal_length();
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}
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RecursionDecision Text::LinkNode::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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// Don't recurse on href.
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return text->walk(visitor);
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}
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void Text::MultiNode::render_to_html(StringBuilder& builder) const
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{
|
||||
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;
|
||||
|
|
|
@ -10,7 +10,9 @@
|
|||
#include <AK/Noncopyable.h>
|
||||
#include <AK/NonnullOwnPtrVector.h>
|
||||
#include <AK/OwnPtr.h>
|
||||
#include <AK/RecursionDecision.h>
|
||||
#include <AK/String.h>
|
||||
#include <LibMarkdown/Forward.h>
|
||||
|
||||
namespace Markdown {
|
||||
|
||||
|
@ -21,6 +23,7 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const = 0;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const = 0;
|
||||
virtual size_t terminal_length() const = 0;
|
||||
virtual RecursionDecision walk(Visitor&) const = 0;
|
||||
|
||||
virtual ~Node() { }
|
||||
};
|
||||
|
@ -39,6 +42,7 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const override;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const override;
|
||||
virtual size_t terminal_length() const override;
|
||||
virtual RecursionDecision walk(Visitor&) const override;
|
||||
};
|
||||
|
||||
class CodeNode : public Node {
|
||||
|
@ -53,6 +57,7 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const override;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const override;
|
||||
virtual size_t terminal_length() const override;
|
||||
virtual RecursionDecision walk(Visitor&) const override;
|
||||
};
|
||||
|
||||
class BreakNode : public Node {
|
||||
|
@ -60,6 +65,7 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const override;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const override;
|
||||
virtual size_t terminal_length() const override;
|
||||
virtual RecursionDecision walk(Visitor&) const override;
|
||||
};
|
||||
|
||||
class TextNode : public Node {
|
||||
|
@ -82,6 +88,7 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const override;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const override;
|
||||
virtual size_t terminal_length() const override;
|
||||
virtual RecursionDecision walk(Visitor&) const override;
|
||||
};
|
||||
|
||||
class LinkNode : public Node {
|
||||
|
@ -100,6 +107,7 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const override;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const override;
|
||||
virtual size_t terminal_length() const override;
|
||||
virtual RecursionDecision walk(Visitor&) const override;
|
||||
};
|
||||
|
||||
class MultiNode : public Node {
|
||||
|
@ -109,12 +117,14 @@ public:
|
|||
virtual void render_to_html(StringBuilder& builder) const override;
|
||||
virtual void render_for_terminal(StringBuilder& builder) const override;
|
||||
virtual size_t terminal_length() const override;
|
||||
virtual RecursionDecision walk(Visitor&) const override;
|
||||
};
|
||||
|
||||
size_t terminal_length() const;
|
||||
|
||||
String render_to_html() const;
|
||||
String render_for_terminal() const;
|
||||
RecursionDecision walk(Visitor&) const;
|
||||
|
||||
static Text parse(StringView const&);
|
||||
|
||||
|
|
50
Userland/Libraries/LibMarkdown/Visitor.h
Normal file
50
Userland/Libraries/LibMarkdown/Visitor.h
Normal file
|
@ -0,0 +1,50 @@
|
|||
/*
|
||||
* Copyright (c) 2021, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <AK/RecursionDecision.h>
|
||||
#include <LibMarkdown/BlockQuote.h>
|
||||
#include <LibMarkdown/CodeBlock.h>
|
||||
#include <LibMarkdown/Document.h>
|
||||
#include <LibMarkdown/Heading.h>
|
||||
#include <LibMarkdown/HorizontalRule.h>
|
||||
#include <LibMarkdown/List.h>
|
||||
#include <LibMarkdown/Paragraph.h>
|
||||
#include <LibMarkdown/Table.h>
|
||||
|
||||
namespace Markdown {
|
||||
|
||||
class Visitor {
|
||||
public:
|
||||
Visitor() = default;
|
||||
virtual ~Visitor() = default;
|
||||
|
||||
virtual RecursionDecision visit(Document const&) { return RecursionDecision::Recurse; }
|
||||
|
||||
virtual RecursionDecision visit(BlockQuote const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(CodeBlock const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(ContainerBlock const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Heading const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(HorizontalRule const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(List const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Paragraph const&) { return RecursionDecision::Recurse; }
|
||||
|
||||
virtual RecursionDecision visit(Table const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Table::Column const&) { return RecursionDecision::Recurse; }
|
||||
|
||||
virtual RecursionDecision visit(Text const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Text::BreakNode const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Text::CodeNode const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Text::EmphasisNode const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Text::LinkNode const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Text::MultiNode const&) { return RecursionDecision::Recurse; }
|
||||
virtual RecursionDecision visit(Text::TextNode const&) { return RecursionDecision::Recurse; }
|
||||
|
||||
virtual RecursionDecision visit(String const&) { return RecursionDecision::Recurse; }
|
||||
};
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue