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Duskmoon UI component library for Phoenix LiveView
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lib/phoenix_duskmoon/component/data_entry/markdown_input.ex
defmodule PhoenixDuskmoon.Component.DataEntry.MarkdownInput do
@moduledoc """
Duskmoon UI Markdown Input Component
Rich markdown editor using `<el-dm-markdown-input>` custom element from
`@duskmoon-dev/el-markdown-input`.
Provides a split-pane editor with live markdown preview, syntax highlighting,
and optional Mermaid diagram support.
Requires `@duskmoon-dev/el-markdown-input` registered in your project:
```js
import '@duskmoon-dev/el-markdown-input/register';
```
"""
use Phoenix.Component
@doc """
Renders an `<el-dm-markdown-input>` custom element for markdown editing.
Supports both standalone usage and Phoenix form field integration.
## Examples
<.dm_markdown_input name="body" value={@body} />
<.dm_markdown_input
field={@form[:body]}
label="Content"
placeholder="Write markdown here…"
theme="atom-one-dark"
/>
"""
@doc type: :component
attr(:id, :any, default: nil, doc: "HTML id attribute")
attr(:name, :any, default: nil, doc: "HTML name attribute for form submission")
attr(:value, :any, default: nil, doc: "markdown content value")
attr(:field, Phoenix.HTML.FormField,
doc: "a form field struct retrieved from the form, sets id/name/value automatically"
)
attr(:label, :string, default: nil, doc: "text label displayed above the editor")
attr(:placeholder, :string, default: nil, doc: "placeholder text shown when editor is empty")
attr(:disabled, :boolean, default: false, doc: "disables the editor")
attr(:readonly, :boolean, default: false, doc: "makes the editor read-only")
attr(:theme, :string,
default: nil,
values: [nil, "github", "atom-one-dark", "atom-one-light", "auto"],
doc: "code syntax highlighting theme for the preview pane"
)
attr(:no_mermaid, :boolean,
default: false,
doc: "disable Mermaid diagram rendering in the preview pane"
)
attr(:no_preview, :boolean,
default: false,
doc: "hide the preview tab and toolbar; write-only mode"
)
attr(:class, :any, default: nil, doc: "additional CSS classes")
attr(:rest, :global)
def dm_markdown_input(%{field: %Phoenix.HTML.FormField{} = field} = assigns) do
assigns
|> assign(field: nil, id: assigns.id || field.id)
|> assign(:name, field.name)
|> assign(:value, field.value)
|> dm_markdown_input()
end
def dm_markdown_input(assigns) do
~H"""
<el-dm-markdown-input
id={@id}
name={@name}
value={@value}
placeholder={@placeholder}
disabled={@disabled}
readonly={@readonly}
theme={@theme}
no-mermaid={@no_mermaid}
no-preview={@no_preview}
class={@class}
{@rest}
></el-dm-markdown-input>
"""
end
end