Adding app/Keymap.go: The keymapping system in lazysql with default k…

…eybinds.

app/Keymap.go

@@ -0,0 +1,81 @@
+package app
+
+import (
+	"github.com/gdamore/tcell/v2"
+	. "github.com/jorgerojas26/lazysql/commands"
+	. "github.com/jorgerojas26/lazysql/keymap"
+)
+
+// KeymapSystem is the actual key mapping system.
+//
+// A map can have several groups. But it always has a "Global" one.
+type KeymapSystem struct {
+	Global Map
+	Groups map[string]Map
+}
+
+func (c KeymapSystem) Group(name string) Map {
+	// Global is special.
+	if name == "global" {
+		return c.Global
+	}
+
+	// Lookup the group
+	if group, ok := c.Groups[name]; ok {
+		return group
+	}
+
+	// Did not find any maps. Return a empty one
+	return Map{}
+}
+
+// Resolve translates a tcell.EventKey into a command based on the mappings in
+// the global group
+func (c KeymapSystem) Resolve(event *tcell.EventKey) Command {
+	return c.Global.Resolve(event)
+}
+
+// Define a global KeymapSystem object with default keybinds
+var Keymaps KeymapSystem = KeymapSystem{
+	Global: Map{
+		Bind{Key: Key{Char: 'L'}, Cmd: MoveRight},
+		Bind{Key: Key{Char: 'H'}, Cmd: MoveLeft},
+		Bind{Key: Key{Code: tcell.KeyCtrlE}, Cmd: SwitchToEditorView},
+		Bind{Key: Key{Code: tcell.KeyCtrlS}, Cmd: Save},
+		Bind{Key: Key{Char: 'q'}, Cmd: Quit},
+		Bind{Key: Key{Code: tcell.KeyBackspace}, Cmd: SwitchToConnectionsView},
+	},
+	Groups: map[string]Map{
+		"tree": {
+			Bind{Key: Key{Char: 'g'}, Cmd: GotoTop},
+			Bind{Key: Key{Char: 'G'}, Cmd: GotoBottom},
+			Bind{Key: Key{Code: tcell.KeyEnter}, Cmd: Execute},
+			Bind{Key: Key{Char: 'j'}, Cmd: MoveDown},
+			Bind{Key: Key{Code: tcell.KeyDown}, Cmd: MoveDown},
+			Bind{Key: Key{Char: 'k'}, Cmd: MoveUp},
+			Bind{Key: Key{Code: tcell.KeyUp}, Cmd: MoveUp},
+		},
+		"table": {
+			Bind{Key: Key{Char: '/'}, Cmd: Search},
+			Bind{Key: Key{Char: 'c'}, Cmd: Edit},
+			Bind{Key: Key{Char: 'd'}, Cmd: Delete},
+			Bind{Key: Key{Char: 'w'}, Cmd: GotoNext},
+			Bind{Key: Key{Char: 'b'}, Cmd: GotoPrev},
+			Bind{Key: Key{Char: '$'}, Cmd: GotoEnd},
+			Bind{Key: Key{Char: '0'}, Cmd: GotoStart},
+			// Tabs
+			Bind{Key: Key{Char: '['}, Cmd: TabPrev},
+			Bind{Key: Key{Char: ']'}, Cmd: TabNext},
+			Bind{Key: Key{Char: '{'}, Cmd: TabFirst},
+			Bind{Key: Key{Char: '}'}, Cmd: TabLast},
+			Bind{Key: Key{Char: 'X'}, Cmd: TabClose},
+			// Pages
+			Bind{Key: Key{Char: '>'}, Cmd: PageNext},
+			Bind{Key: Key{Char: '<'}, Cmd: PagePrev},
+		},
+		"editor": {
+			Bind{Key: Key{Code: tcell.KeyCtrlR}, Cmd: Execute},
+			Bind{Key: Key{Code: tcell.KeyEscape}, Cmd: Quit},
+		},
+	},
+}