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Simplify block element rendering in Markdown

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Adrià Arrufat
2026-02-18 11:01:00 +09:00
parent dea492fd64
commit 66d9eaee78
1 changed files with 33 additions and 29 deletions
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62
src/browser/markdown.zig
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@@ -45,6 +45,27 @@ const State = struct {
last_char_was_newline: bool = true, last_char_was_newline: bool = true,
}; };
fn isBlock(tag: Element.Tag) bool {
return switch (tag) {
.p, .div, .section, .article, .header, .footer, .nav, .aside, .h1, .h2, .h3, .h4, .h5, .h6, .ul, .ol, .blockquote, .pre, .table, .hr => true,
else => false,
};
}
fn shouldAddSpacing(tag: Element.Tag) bool {
return switch (tag) {
.p, .h1, .h2, .h3, .h4, .h5, .h6, .blockquote, .pre, .table => true,
else => false,
};
}
fn ensureNewline(state: *State, writer: *std.Io.Writer) !void {
if (!state.last_char_was_newline) {
try writer.writeByte('\n');
state.last_char_was_newline = true;
}
}
pub fn dump(node: *Node, opts: Opts, writer: *std.Io.Writer, page: *Page) !void { pub fn dump(node: *Node, opts: Opts, writer: *std.Io.Writer, page: *Page) !void {
_ = opts; _ = opts;
var state = State{}; var state = State{};
@@ -98,26 +119,16 @@ fn renderElement(el: *Element, state: *State, writer: *std.Io.Writer, page: *Pag
// --- Opening Tag Logic --- // --- Opening Tag Logic ---
// Ensure block elements start on a new line (double newline for paragraphs etc) // Ensure block elements start on a new line (double newline for paragraphs etc)
switch (tag) { if (isBlock(tag)) {
.p, .div, .section, .article, .header, .footer, .nav, .aside, .h1, .h2, .h3, .h4, .h5, .h6, .ul, .ol, .blockquote, .pre, .table, .hr => { if (!state.in_table) {
if (!state.in_table) { try ensureNewline(state, writer);
if (!state.last_char_was_newline) { if (shouldAddSpacing(tag)) {
try writer.writeByte('\n'); // Add an extra newline for spacing between blocks
state.last_char_was_newline = true;
}
if (tag == .p or tag == .h1 or tag == .h2 or tag == .h3 or tag == .h4 or tag == .h5 or tag == .h6 or tag == .blockquote or tag == .pre or tag == .table) {
// Add an extra newline for spacing between blocks
try writer.writeByte('\n');
}
}
},
.li, .tr => {
if (!state.last_char_was_newline) {
try writer.writeByte('\n'); try writer.writeByte('\n');
state.last_char_was_newline = true;
} }
}, }
else => {}, } else if (tag == .li or tag == .tr) {
try ensureNewline(state, writer);
} }
// Prefixes // Prefixes
@@ -323,17 +334,10 @@ fn renderElement(el: *Element, state: *State, writer: *std.Io.Writer, page: *Pag
} }
// Post-block newlines // Post-block newlines
switch (tag) { if (isBlock(tag)) {
.p, .div, .section, .article, .header, .footer, .nav, .aside, .h1, .h2, .h3, .h4, .h5, .h6, .ul, .ol, .blockquote, .table => { if (!state.in_table) {
if (!state.in_table) { try ensureNewline(state, writer);
if (!state.last_char_was_newline) { }
try writer.writeByte('\n');
state.last_char_was_newline = true;
}
}
},
.tr => {}, // Handled explicitly in closing tag logic
else => {},
} }
} }