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GJsonArrayModel: Add an optional "massage_for_display" fieldspec hook

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This allows to you install a custom callback that can do anything with
Role::Display data before it's returned by GJsonArrayModel::data().
This commit is contained in:
Andreas Kling 2019-08-10 11:06:29 +02:00
parent 0f0a528323
commit 078ce97c41
3 changed files with 46 additions and 24 deletions
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14
Libraries/LibGUI/GJsonArrayModel.cpp
View file

@ -26,11 +26,14 @@ GModel::ColumnMetadata GJsonArrayModel::column_metadata(int column) const
GVariant GJsonArrayModel::data(const GModelIndex& index, Role role) const
{
auto& field_spec = m_fields[index.column()];
auto& object = m_array.at(index.row()).as_object();
if (role == GModel::Role::Display) {
auto& json_field_name = m_fields[index.column()].json_field_name;
auto& json_field_name = field_spec.json_field_name;
auto data = object.get(json_field_name);
if (field_spec.massage_for_display)
return field_spec.massage_for_display(data);
if (data.is_int())
return data.as_int();
if (data.is_uint())
@ -39,3 +42,12 @@ GVariant GJsonArrayModel::data(const GModelIndex& index, Role role) const
}
return {};
}
void GJsonArrayModel::set_json_path(const String& json_path)
{
if (m_json_path == json_path)
return;
m_json_path = json_path;
update();
}

12
Libraries/LibGUI/GJsonArrayModel.h
View file

@ -6,9 +6,18 @@
class GJsonArrayModel final : public GModel {
public:
struct FieldSpec {
FieldSpec(const String& a_json_field_name, const String& a_column_name, TextAlignment a_text_alignment, Function<GVariant(const GVariant&)>&& a_massage_for_display = {})
: json_field_name(a_json_field_name)
, column_name(a_column_name)
, text_alignment(a_text_alignment)
, massage_for_display(move(a_massage_for_display))
{
}
String json_field_name;
String column_name;
TextAlignment text_alignment;
Function<GVariant(const GVariant&)> massage_for_display;
};
static NonnullRefPtr<GJsonArrayModel> create(const String& json_path, Vector<FieldSpec>&& fields)
@ -25,6 +34,9 @@ public:
virtual GVariant data(const GModelIndex&, Role = Role::Display) const override;
virtual void update() override;
const String& json_path() const { return m_json_path; }
void set_json_path(const String& json_path);
private:
GJsonArrayModel(const String& json_path, Vector<FieldSpec>&& fields)
: m_json_path(json_path)