properties for source

local obs = obslua

local hotkey_id = obs.OBS_INVALID_HOTKEY_ID

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function get_selected_final_source_size()
    local width = 0
    local height = 0

    -- Get selected source
    local current_scene = obs.obs_frontend_get_current_scene()
    local scene_ctx = obs.obs_scene_from_source(current_scene)
    local items = obs.obs_scene_enum_items(scene_ctx)
    if items ~= nil then
        for _, item in ipairs(items) do
            if obs.obs_sceneitem_selected(item) then
                local source = obs.obs_sceneitem_get_source(item)
                local scale = obs.vec2()
                local crop = obs.obs_sceneitem_crop()
                obs.obs_sceneitem_get_scale(item, scale)
                obs.obs_sceneitem_get_crop(item, crop)
                -- Calculate final (filtered) size
                width = scale.x * (obs.obs_source_get_width(source) - crop.left - crop.right)
                height = scale.y * (obs.obs_source_get_height(source) - crop.top - crop.bottom)
            end
        end
    end

    obs.obs_scene_release(scene_ctx)
    obs.sceneitem_list_release(items)

    return width, height
end

-- The "Log final size of the Source" hotkey callback
function log_source_size(pressed)
    if not pressed then
        return
    end

    -- Print "WidthxHeight"
    print(string.format("Selected source size: %dx%d", get_selected_final_source_size()))
end

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-- A function named script_description returns the description shown to the user
function script_description()
    return "On 'Log final size of the Source' hotkey press prints to the log-file the final size of the selected source."
end

-- A function named script_load will be called on startup
function script_load(settings)
    hotkey_id = obs.obs_hotkey_register_frontend("log_source_size", "Log final size of the Source", log_source_size)
    local hotkey_save_array = obs.obs_data_get_array(settings, "log_source_size.trigger")
    obs.obs_hotkey_load(hotkey_id, hotkey_save_array)
    obs.obs_data_array_release(hotkey_save_array)
end

-- A function named script_save will be called when the script is saved
--
-- NOTE: This function is usually used for saving extra data (such as in this
-- case, a hotkey's save data). Settings set via the properties are saved
-- automatically.
function script_save(settings)
    local hotkey_save_array = obs.obs_hotkey_save(hotkey_id)
    obs.obs_data_set_array(settings, "log_source_size.trigger", hotkey_save_array)
    obs.obs_data_array_release(hotkey_save_array)
end