widget_metrics.hpp

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#pragma once

 
#include <string>
 
#include <pulp/view/geometry.hpp>
 
namespace pulp::view {
 
class View;

struct FontSpec {
    std::string family = "Inter";
    float size = 13.0f;
    int weight = 400;          
    float letter_spacing = 0.0f;
};

struct EdgeInsets {
    float top = 0.0f, right = 0.0f, bottom = 0.0f, left = 0.0f;
    float horizontal() const { return left + right; }
    float vertical() const { return top + bottom; }
};

struct MenuItemMetricsQuery {
    std::string text;
    bool separator = false;
    bool header = false;
    bool ticked = false;
    bool has_submenu = false;
    float standard_height = 0.0f;
};

struct BoxSize {
    float width = 0.0f;
    float height = 0.0f;
};

class WidgetMetrics {
public:
    virtual ~WidgetMetrics() = default;
 
    // ── Menus ────────────────────────────────────────────────────────────
    //
    // A menu panel sizes itself from its rows: it asks for each row's natural
    // size, takes the widest, stacks the heights, and adds the border. All
    // three of those inputs are delegated, so a skin can make a menu wider,
    // denser, or thicker-bordered without the menu widget knowing why.
 
    virtual bool menu_item_size(const MenuItemMetricsQuery& query, BoxSize& out, View& source) {
        (void)query; (void)out; (void)source;
        return false;
    }

    virtual bool menu_border(float& out, View& source) {
        (void)out; (void)source;
        return false;
    }
 
    virtual bool menu_font(FontSpec& out, View& source) {
        (void)out; (void)source;
        return false;
    }
 
    // ── Text-bearing controls ────────────────────────────────────────────
 
    virtual bool button_font(FontSpec& out, View& source) {
        (void)out; (void)source;
        return false;
    }
 
    virtual bool combo_box_font(FontSpec& out, View& source) {
        (void)out; (void)source;
        return false;
    }
 
    virtual bool text_field_font(FontSpec& out, View& source) {
        (void)out; (void)source;
        return false;
    }

    virtual bool text_field_insets(EdgeInsets& out, View& source) {
        (void)out; (void)source;
        return false;
    }

    virtual bool caret_width(float& out, View& source) {
        (void)out; (void)source;
        return false;
    }
};
 
} // namespace pulp::view