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// SPDX-License-Identifier: GPL-3.0-or-later
package model
import (
"encoding/json"
"os"
"path/filepath"
"krino/internal/xdg"
)
// Prefs is how the window behaves - nothing about what krino does to
// files, which belongs in the configuration. It lives beside krino.conf as
// gui.json, a file krino itself never reads (his request, 2026-09-16).
type Prefs struct {
// Colours paints the configuration in the Text tab.
Colours bool `json:"colours"`
// Preview shows the file behind the selected row in the Plan tab.
Preview bool `json:"preview"`
// SelectAll starts a plan's rows checked, as the terminal review does.
SelectAll bool `json:"select_all"`
// PreviewHeight is how tall the preview under the explanation is, in
// pixels; the divider between them sets it, and so does Settings.
PreviewHeight int `json:"preview_height"`
// PreviewWidth is the same measurement in the stacked layout, where
// the preview sits beside the explanation rather than under it.
PreviewWidth int `json:"preview_width"`
// ListWidth and ListHeight are where the divider between the file list
// and the explanation was left, in each layout. Every divider a hand
// moves is kept (his request, 2026-09-17).
ListWidth int `json:"list_width"`
ListHeight int `json:"list_height"`
// Layout is how the Plan tab is arranged: "side" puts the file list
// beside the explanation, "stacked" puts it above, with the preview
// beside the explanation underneath.
Layout string `json:"layout"`
}
// The two arrangements of the Plan tab.
const (
LayoutSide = "side"
LayoutStacked = "stacked"
)
// The sizes a window opens with until a divider is moved, and the floor a
// smaller one is raised to.
const (
DefaultPreviewHeight = 280
DefaultPreviewWidth = 360
DefaultListWidth = 780
DefaultListHeight = 420
)
// DefaultPrefs is what a window does before anything is chosen.
func DefaultPrefs() Prefs {
return Prefs{Colours: true, Preview: true, SelectAll: true,
PreviewHeight: DefaultPreviewHeight, PreviewWidth: DefaultPreviewWidth,
ListWidth: DefaultListWidth, ListHeight: DefaultListHeight,
Layout: LayoutSide}
}
// PrefsFile is where they are kept.
func PrefsFile() string {
return filepath.Join(xdg.ConfigHome(), "krino", "gui.json")
}
// LoadPrefs reads them. A missing or unreadable file is not an error: the
// window opens with the defaults, as it does the first time.
func LoadPrefs() Prefs {
p := DefaultPrefs()
data, err := os.ReadFile(PrefsFile())
if err != nil {
return p
}
if err := json.Unmarshal(data, &p); err != nil {
return DefaultPrefs()
}
if p.PreviewHeight < 80 {
p.PreviewHeight = DefaultPreviewHeight
}
if p.PreviewWidth < 80 {
p.PreviewWidth = DefaultPreviewWidth
}
if p.Layout != LayoutSide && p.Layout != LayoutStacked {
p.Layout = LayoutSide
}
return p
}
// Save writes them, creating the directory if it is not there yet.
func (p Prefs) Save() error {
data, err := json.MarshalIndent(p, "", " ")
if err != nil {
return err
}
file := PrefsFile()
if err := os.MkdirAll(filepath.Dir(file), 0o755); err != nil {
return err
}
return os.WriteFile(file, append(data, '\n'), 0o644)
}
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