style(eval): move in its own package

1 files changed, 79 insertions, 0 deletions

diff --git a/src/eval/paragraph.zig b/src/eval/paragraph.zig
new file mode 100644
index 0000000..e56b7ff
--- /dev/null
+++ b/src/eval/paragraph.zig
@@ -0,0 +1,79 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const HTML = Element.HTML;
+const Element = @import("Element.zig");
+
+pub const Block = Element.Simple("p");
+
+pub const Bold = Element.Simple("b");
+pub const Italic = Element.Simple("em");
+pub const Code = Element.Simple("code");
+
+
+pub const Link = struct {
+    link: []const u8,
+    content: Element,
+    target: ?[]const u8 = null,
+
+    const Self = @This();
+
+    pub fn init(alloc: Allocator, content: Element, link: []const u8) !*Self {
+        const v = try alloc.create(Self);
+        v.* = .{
+            .content = content,
+            .link = link,
+        };
+        return v;
+    }
+
+    pub fn element(self: *Self) Element {
+        return .{ .ptr = self, .vtable = .{ .deinit = destroy, .html = html } };
+    }
+
+    pub fn deinit(self: *Self, alloc: Allocator) void {
+        destroy(self, alloc);
+    }
+
+    fn destroy(context: *anyopaque, alloc: Allocator) void {
+        var self: *Self = @ptrCast(@alignCast(context));
+        self.content.deinit(alloc);
+        alloc.destroy(self);
+    }
+
+    fn html(context: *anyopaque, alloc: Allocator) HTML.Error!HTML {
+        const self: *Self = @ptrCast(@alignCast(context));
+        var el = try HTML.init(alloc, .content, "a");
+        errdefer el.deinit();
+        try el.appendContent(try self.content.html(alloc));
+        try el.setAttribute("href", self.link);
+        if (self.target) |target| try el.setAttribute("target", target);
+        return el;
+    }
+};
+
+fn doTest(alloc: Allocator, el: Element, exp: []const u8) !void {
+    const got = try el.renderHTML(alloc);
+    defer alloc.free(got);
+    std.testing.expect(std.mem.eql(u8, got, exp)) catch |err| {
+        std.debug.print("{s}\n", .{got});
+        return err;
+    };
+}
+
+test "paragraph" {
+    const alloc = std.testing.allocator;
+
+    const lit = (try Element.Literal.init(alloc, "hello world")).element();
+    try doTest(alloc, lit, "hello world");
+
+    var p = try Block.init(alloc);
+    try p.content.append(alloc, lit);
+    defer p.deinit(alloc);
+    try doTest(alloc, p.element(), "<p>hello world</p>");
+
+    const link = (try Link.init(alloc, (try Element.Literal.init(alloc, "foo")).element(), "example.org")).element();
+    try doTest(alloc, link, "<a href=\"example.org\">foo</a>");
+
+    try p.content.append(alloc, link);
+    try doTest(alloc, p.element(), "<p>hello world<a href=\"example.org\">foo</a></p>");
+}