mirror of
https://github.com/lightpanda-io/browser.git
synced 2026-03-21 20:24:42 +00:00
Merge pull request #1560 from arrufat/dump-markdown
Add support for dumping output to markdown
This commit is contained in:
@@ -182,9 +182,14 @@ pub const Serve = struct {
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common: Common = .{},
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};
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pub const DumpFormat = enum {
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html,
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markdown,
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};
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pub const Fetch = struct {
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url: [:0]const u8,
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dump: bool = false,
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dump_mode: ?DumpFormat = null,
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common: Common = .{},
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withbase: bool = false,
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strip: dump.Opts.Strip = .{},
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@@ -321,11 +326,12 @@ pub fn printUsageAndExit(self: *const Config, success: bool) void {
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\\
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\\fetch command
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\\Fetches the specified URL
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\\Example: {s} fetch --dump https://lightpanda.io/
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\\Example: {s} fetch --dump html https://lightpanda.io/
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\\
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\\Options:
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\\--dump Dumps document to stdout.
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\\ Defaults to false.
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\\ Argument must be 'html' or 'markdown'.
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\\ Defaults to no dump.
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\\
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\\--strip_mode Comma separated list of tag groups to remove from dump
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\\ the dump. e.g. --strip_mode js,css
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@@ -532,7 +538,7 @@ fn parseFetchArgs(
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allocator: Allocator,
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args: *std.process.ArgIterator,
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) !Fetch {
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var fetch_dump: bool = false;
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var dump_mode: ?DumpFormat = null;
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var withbase: bool = false;
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var url: ?[:0]const u8 = null;
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var common: Common = .{};
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@@ -540,7 +546,17 @@ fn parseFetchArgs(
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while (args.next()) |opt| {
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if (std.mem.eql(u8, "--dump", opt)) {
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fetch_dump = true;
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var peek_args = args.*;
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if (peek_args.next()) |next_arg| {
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if (std.meta.stringToEnum(DumpFormat, next_arg)) |mode| {
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dump_mode = mode;
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_ = args.next();
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} else {
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dump_mode = .html;
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}
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} else {
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dump_mode = .html;
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}
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continue;
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}
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@@ -607,7 +623,7 @@ fn parseFetchArgs(
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return .{
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.url = url.?,
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.dump = fetch_dump,
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.dump_mode = dump_mode,
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.strip = strip,
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.common = common,
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.withbase = withbase,
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506
src/browser/markdown.zig
Normal file
506
src/browser/markdown.zig
Normal file
@@ -0,0 +1,506 @@
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// Copyright (C) 2023-2026 Lightpanda (Selecy SAS)
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//
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// Francis Bouvier <francis@lightpanda.io>
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// Pierre Tachoire <pierre@lightpanda.io>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const std = @import("std");
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const Page = @import("Page.zig");
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const Element = @import("webapi/Element.zig");
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const Node = @import("webapi/Node.zig");
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pub const Opts = struct {
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// Options for future customization (e.g., dialect)
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};
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const State = struct {
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const ListType = enum { ordered, unordered };
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const ListState = struct {
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type: ListType,
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index: usize,
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};
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list_depth: usize = 0,
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list_stack: [32]ListState = undefined,
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in_pre: bool = false,
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pre_node: ?*Node = null,
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in_code: bool = false,
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in_table: bool = false,
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table_row_index: usize = 0,
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table_col_count: usize = 0,
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last_char_was_newline: bool = true,
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};
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fn isBlock(tag: Element.Tag) bool {
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return switch (tag) {
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.p, .div, .section, .article, .header, .footer, .nav, .aside, .h1, .h2, .h3, .h4, .h5, .h6, .ul, .ol, .blockquote, .pre, .table, .hr => true,
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else => false,
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};
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}
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fn shouldAddSpacing(tag: Element.Tag) bool {
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return switch (tag) {
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.p, .h1, .h2, .h3, .h4, .h5, .h6, .blockquote, .pre, .table => true,
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else => false,
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};
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}
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fn ensureNewline(state: *State, writer: *std.Io.Writer) !void {
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if (!state.last_char_was_newline) {
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try writer.writeByte('\n');
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state.last_char_was_newline = true;
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}
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}
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pub fn dump(node: *Node, opts: Opts, writer: *std.Io.Writer, page: *Page) !void {
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_ = opts;
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var state = State{};
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try render(node, &state, writer, page);
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if (!state.last_char_was_newline) {
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try writer.writeByte('\n');
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}
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}
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fn render(node: *Node, state: *State, writer: *std.Io.Writer, page: *Page) error{WriteFailed}!void {
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switch (node._type) {
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.document, .document_fragment => {
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try renderChildren(node, state, writer, page);
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},
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.element => |el| {
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try renderElement(el, state, writer, page);
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},
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.cdata => |cd| {
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if (node.is(Node.CData.Text)) |_| {
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var text = cd.getData();
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if (state.in_pre) {
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if (state.pre_node) |pre| {
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if (node.parentNode() == pre and node.nextSibling() == null) {
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text = std.mem.trimRight(u8, text, " \t\r\n");
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}
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}
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}
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try renderText(text, state, writer);
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}
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},
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else => {}, // Ignore other node types
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}
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}
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fn renderChildren(parent: *Node, state: *State, writer: *std.Io.Writer, page: *Page) !void {
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var it = parent.childrenIterator();
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while (it.next()) |child| {
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try render(child, state, writer, page);
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}
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}
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fn renderElement(el: *Element, state: *State, writer: *std.Io.Writer, page: *Page) !void {
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const tag = el.getTag();
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// Skip hidden/metadata elements
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switch (tag) {
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.script, .style, .noscript, .template, .head, .meta, .link, .title, .svg => return,
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else => {},
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}
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// --- Opening Tag Logic ---
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// Ensure block elements start on a new line (double newline for paragraphs etc)
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if (isBlock(tag)) {
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if (!state.in_table) {
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try ensureNewline(state, writer);
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if (shouldAddSpacing(tag)) {
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// Add an extra newline for spacing between blocks
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try writer.writeByte('\n');
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}
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}
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} else if (tag == .li or tag == .tr) {
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try ensureNewline(state, writer);
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}
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// Prefixes
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switch (tag) {
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.h1 => try writer.writeAll("# "),
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.h2 => try writer.writeAll("## "),
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.h3 => try writer.writeAll("### "),
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.h4 => try writer.writeAll("#### "),
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.h5 => try writer.writeAll("##### "),
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.h6 => try writer.writeAll("###### "),
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.ul => {
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if (state.list_depth < state.list_stack.len) {
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state.list_stack[state.list_depth] = .{ .type = .unordered, .index = 0 };
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state.list_depth += 1;
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}
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},
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.ol => {
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if (state.list_depth < state.list_stack.len) {
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state.list_stack[state.list_depth] = .{ .type = .ordered, .index = 1 };
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state.list_depth += 1;
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}
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},
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.li => {
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const indent = if (state.list_depth > 0) state.list_depth - 1 else 0;
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for (0..indent) |_| try writer.writeAll(" ");
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if (state.list_depth > 0) {
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const current_list = &state.list_stack[state.list_depth - 1];
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if (current_list.type == .ordered) {
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try writer.print("{d}. ", .{current_list.index});
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current_list.index += 1;
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} else {
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try writer.writeAll("- ");
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}
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} else {
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try writer.writeAll("- ");
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}
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state.last_char_was_newline = false;
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},
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.table => {
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state.in_table = true;
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state.table_row_index = 0;
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state.table_col_count = 0;
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},
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.tr => {
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state.table_col_count = 0;
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try writer.writeByte('|');
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},
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.td, .th => {
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// Note: leading pipe handled by previous cell closing or tr opening
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state.last_char_was_newline = false;
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try writer.writeByte(' ');
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},
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.blockquote => {
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try writer.writeAll("> ");
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state.last_char_was_newline = false;
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},
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.pre => {
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try writer.writeAll("```\n");
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state.in_pre = true;
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state.pre_node = el.asNode();
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state.last_char_was_newline = true;
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},
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.code => {
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if (!state.in_pre) {
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try writer.writeByte('`');
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state.in_code = true;
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state.last_char_was_newline = false;
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}
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},
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.b, .strong => {
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try writer.writeAll("**");
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state.last_char_was_newline = false;
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},
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.i, .em => {
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try writer.writeAll("*");
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state.last_char_was_newline = false;
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},
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.s, .del => {
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try writer.writeAll("~~");
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state.last_char_was_newline = false;
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},
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.hr => {
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try writer.writeAll("---\n");
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state.last_char_was_newline = true;
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return; // Void element
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},
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.br => {
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if (state.in_table) {
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try writer.writeByte(' ');
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} else {
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try writer.writeByte('\n');
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state.last_char_was_newline = true;
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}
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return; // Void element
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},
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.img => {
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try writer.writeAll(";
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if (el.getAttributeSafe(comptime .wrap("src"))) |src| {
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try writer.writeAll(src);
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}
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try writer.writeAll(")");
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state.last_char_was_newline = false;
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return; // Treat as void
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},
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.anchor => {
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try writer.writeByte('[');
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try renderChildren(el.asNode(), state, writer, page);
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try writer.writeAll("](");
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if (el.getAttributeSafe(comptime .wrap("href"))) |href| {
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try writer.writeAll(href);
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}
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try writer.writeByte(')');
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state.last_char_was_newline = false;
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return;
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},
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.input => {
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if (el.getAttributeSafe(comptime .wrap("type"))) |type_attr| {
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if (std.ascii.eqlIgnoreCase(type_attr, "checkbox")) {
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if (el.getAttributeSafe(comptime .wrap("checked"))) |_| {
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try writer.writeAll("[x] ");
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} else {
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try writer.writeAll("[ ] ");
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}
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state.last_char_was_newline = false;
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}
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}
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return;
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},
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else => {},
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}
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// --- Render Children ---
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try renderChildren(el.asNode(), state, writer, page);
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// --- Closing Tag Logic ---
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// Suffixes
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switch (tag) {
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.pre => {
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if (!state.last_char_was_newline) {
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try writer.writeByte('\n');
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}
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try writer.writeAll("```\n");
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state.in_pre = false;
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state.pre_node = null;
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state.last_char_was_newline = true;
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},
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.code => {
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if (!state.in_pre) {
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try writer.writeByte('`');
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state.in_code = false;
|
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state.last_char_was_newline = false;
|
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}
|
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},
|
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.b, .strong => {
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try writer.writeAll("**");
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state.last_char_was_newline = false;
|
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},
|
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.i, .em => {
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try writer.writeAll("*");
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state.last_char_was_newline = false;
|
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},
|
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.s, .del => {
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try writer.writeAll("~~");
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state.last_char_was_newline = false;
|
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},
|
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.blockquote => {},
|
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.ul, .ol => {
|
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if (state.list_depth > 0) state.list_depth -= 1;
|
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},
|
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.table => {
|
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state.in_table = false;
|
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},
|
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.tr => {
|
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try writer.writeByte('\n');
|
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if (state.table_row_index == 0) {
|
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try writer.writeByte('|');
|
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var i: usize = 0;
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while (i < state.table_col_count) : (i += 1) {
|
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try writer.writeAll("---|");
|
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}
|
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try writer.writeByte('\n');
|
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}
|
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state.table_row_index += 1;
|
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state.last_char_was_newline = true;
|
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},
|
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.td, .th => {
|
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try writer.writeAll(" |");
|
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state.table_col_count += 1;
|
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state.last_char_was_newline = false;
|
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},
|
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else => {},
|
||||
}
|
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|
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// Post-block newlines
|
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if (isBlock(tag)) {
|
||||
if (!state.in_table) {
|
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try ensureNewline(state, writer);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn renderText(text: []const u8, state: *State, writer: *std.Io.Writer) !void {
|
||||
if (text.len == 0) return;
|
||||
|
||||
if (state.in_pre) {
|
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try writer.writeAll(text);
|
||||
if (text.len > 0 and text[text.len - 1] == '\n') {
|
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state.last_char_was_newline = true;
|
||||
} else {
|
||||
state.last_char_was_newline = false;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
// Check for pure whitespace
|
||||
const is_all_whitespace = for (text) |c| {
|
||||
if (!std.ascii.isWhitespace(c)) break false;
|
||||
} else true;
|
||||
|
||||
if (is_all_whitespace) {
|
||||
if (!state.last_char_was_newline) {
|
||||
try writer.writeByte(' ');
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
// Collapse whitespace
|
||||
var it = std.mem.tokenizeAny(u8, text, " \t\n\r");
|
||||
var first = true;
|
||||
while (it.next()) |word| {
|
||||
if (first) {
|
||||
if (!state.last_char_was_newline) {
|
||||
if (text.len > 0 and std.ascii.isWhitespace(text[0])) {
|
||||
try writer.writeByte(' ');
|
||||
}
|
||||
}
|
||||
} else {
|
||||
try writer.writeByte(' ');
|
||||
}
|
||||
|
||||
try escapeMarkdown(writer, word);
|
||||
state.last_char_was_newline = false;
|
||||
first = false;
|
||||
}
|
||||
|
||||
// Handle trailing whitespace from the original text
|
||||
if (!first and !state.last_char_was_newline) {
|
||||
if (text.len > 0 and std.ascii.isWhitespace(text[text.len - 1])) {
|
||||
try writer.writeByte(' ');
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn escapeMarkdown(writer: *std.Io.Writer, text: []const u8) !void {
|
||||
for (text) |c| {
|
||||
switch (c) {
|
||||
'\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '#', '+', '-', '!', '|' => {
|
||||
try writer.writeByte('\\');
|
||||
try writer.writeByte(c);
|
||||
},
|
||||
else => try writer.writeByte(c),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn testMarkdownHTML(html: []const u8, expected: []const u8) !void {
|
||||
const testing = @import("../testing.zig");
|
||||
const page = try testing.test_session.createPage();
|
||||
defer testing.test_session.removePage();
|
||||
const doc = page.window._document;
|
||||
|
||||
const div = try doc.createElement("div", null, page);
|
||||
try page.parseHtmlAsChildren(div.asNode(), html);
|
||||
|
||||
var aw: std.Io.Writer.Allocating = .init(testing.allocator);
|
||||
defer aw.deinit();
|
||||
try dump(div.asNode(), .{}, &aw.writer, page);
|
||||
|
||||
try testing.expectString(expected, aw.written());
|
||||
}
|
||||
|
||||
test "markdown: basic" {
|
||||
try testMarkdownHTML("Hello world", "Hello world\n");
|
||||
}
|
||||
|
||||
test "markdown: whitespace" {
|
||||
try testMarkdownHTML("<span>A</span> <span>B</span>", "A B\n");
|
||||
}
|
||||
|
||||
test "markdown: escaping" {
|
||||
try testMarkdownHTML("<p># Not a header</p>", "\n\\# Not a header\n");
|
||||
}
|
||||
|
||||
test "markdown: strikethrough" {
|
||||
try testMarkdownHTML("<s>deleted</s>", "~~deleted~~\n");
|
||||
}
|
||||
|
||||
test "markdown: task list" {
|
||||
try testMarkdownHTML(
|
||||
\\<input type="checkbox" checked><input type="checkbox">
|
||||
, "[x] [ ] \n");
|
||||
}
|
||||
|
||||
test "markdown: ordered list" {
|
||||
try testMarkdownHTML(
|
||||
\\<ol><li>First</li><li>Second</li></ol>
|
||||
, "1. First\n2. Second\n");
|
||||
}
|
||||
|
||||
test "markdown: table" {
|
||||
try testMarkdownHTML(
|
||||
\\<table><thead><tr><th>Head 1</th><th>Head 2</th></tr></thead>
|
||||
\\<tbody><tr><td>Cell 1</td><td>Cell 2</td></tr></tbody></table>
|
||||
,
|
||||
\\
|
||||
\\| Head 1 | Head 2 |
|
||||
\\|---|---|
|
||||
\\| Cell 1 | Cell 2 |
|
||||
\\
|
||||
);
|
||||
}
|
||||
|
||||
test "markdown: nested lists" {
|
||||
try testMarkdownHTML(
|
||||
\\<ul><li>Parent<ul><li>Child</li></ul></li></ul>
|
||||
,
|
||||
\\- Parent
|
||||
\\ - Child
|
||||
\\
|
||||
);
|
||||
}
|
||||
|
||||
test "markdown: blockquote" {
|
||||
try testMarkdownHTML("<blockquote>Hello world</blockquote>", "\n> Hello world\n");
|
||||
}
|
||||
|
||||
test "markdown: links" {
|
||||
try testMarkdownHTML("<a href=\"https://lightpanda.io\">Lightpanda</a>", "[Lightpanda](https://lightpanda.io)\n");
|
||||
}
|
||||
|
||||
test "markdown: images" {
|
||||
try testMarkdownHTML("<img src=\"logo.png\" alt=\"Logo\">", "\n");
|
||||
}
|
||||
|
||||
test "markdown: headings" {
|
||||
try testMarkdownHTML("<h1>Title</h1><h2>Subtitle</h2>",
|
||||
\\
|
||||
\\# Title
|
||||
\\
|
||||
\\## Subtitle
|
||||
\\
|
||||
);
|
||||
}
|
||||
|
||||
test "markdown: code" {
|
||||
try testMarkdownHTML(
|
||||
\\<p>Use git push</p>
|
||||
\\<pre><code>line 1
|
||||
\\line 2</code></pre>
|
||||
,
|
||||
\\
|
||||
\\Use git push
|
||||
\\
|
||||
\\```
|
||||
\\line 1
|
||||
\\line 2
|
||||
\\```
|
||||
\\
|
||||
);
|
||||
}
|
||||
@@ -28,6 +28,7 @@ pub const Notification = @import("Notification.zig");
|
||||
pub const log = @import("log.zig");
|
||||
pub const js = @import("browser/js/js.zig");
|
||||
pub const dump = @import("browser/dump.zig");
|
||||
pub const markdown = @import("browser/markdown.zig");
|
||||
pub const build_config = @import("build_config");
|
||||
pub const crash_handler = @import("crash_handler.zig");
|
||||
|
||||
@@ -36,6 +37,7 @@ const IS_DEBUG = @import("builtin").mode == .Debug;
|
||||
pub const FetchOpts = struct {
|
||||
wait_ms: u32 = 5000,
|
||||
dump: dump.RootOpts,
|
||||
dump_mode: ?Config.DumpFormat = null,
|
||||
writer: ?*std.Io.Writer = null,
|
||||
};
|
||||
pub fn fetch(app: *App, url: [:0]const u8, opts: FetchOpts) !void {
|
||||
@@ -97,7 +99,12 @@ pub fn fetch(app: *App, url: [:0]const u8, opts: FetchOpts) !void {
|
||||
_ = session.wait(opts.wait_ms);
|
||||
|
||||
const writer = opts.writer orelse return;
|
||||
try dump.root(page.window._document, opts.dump, writer, page);
|
||||
if (opts.dump_mode) |mode| {
|
||||
switch (mode) {
|
||||
.html => try dump.root(page.window._document, opts.dump, writer, page),
|
||||
.markdown => try markdown.dump(page.window._document.asNode(), .{}, writer, page),
|
||||
}
|
||||
}
|
||||
try writer.flush();
|
||||
}
|
||||
|
||||
|
||||
@@ -108,10 +108,11 @@ fn run(allocator: Allocator, main_arena: Allocator) !void {
|
||||
},
|
||||
.fetch => |opts| {
|
||||
const url = opts.url;
|
||||
log.debug(.app, "startup", .{ .mode = "fetch", .dump = opts.dump, .url = url, .snapshot = app.snapshot.fromEmbedded() });
|
||||
log.debug(.app, "startup", .{ .mode = "fetch", .dump_mode = opts.dump_mode, .url = url, .snapshot = app.snapshot.fromEmbedded() });
|
||||
|
||||
var fetch_opts = lp.FetchOpts{
|
||||
.wait_ms = 5000,
|
||||
.dump_mode = opts.dump_mode,
|
||||
.dump = .{
|
||||
.strip = opts.strip,
|
||||
.with_base = opts.withbase,
|
||||
@@ -120,7 +121,7 @@ fn run(allocator: Allocator, main_arena: Allocator) !void {
|
||||
|
||||
var stdout = std.fs.File.stdout();
|
||||
var writer = stdout.writer(&.{});
|
||||
if (opts.dump) {
|
||||
if (opts.dump_mode != null) {
|
||||
fetch_opts.writer = &writer.interface;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user