feat: add a cmd to request window size (#988)

* feat: add a cmd to request window size Fixes: #987 (comment) * Update commands.go Co-authored-by: Christian Rocha <[email protected]> --------- Co-authored-by: Christian Rocha <[email protected]>
charmbracelet · Jul 16, 2024 · 7d70838 · 7d70838
1 parent 4497aa9
commit 7d70838
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diff --git a/commands.go b/commands.go
@@ -201,3 +201,16 @@ func SetWindowTitle(title string) Cmd {
 		return setWindowTitleMsg(title)
 	}
 }
+
+type windowSizeMsg struct{}
+
+// WindowSize is a command that queries the terminal for its current size. It
+// delivers the results to Update via a [WindowSizeMsg]. Keep in mind that
+// WindowSizeMsgs will automatically be delivered to Update when the [Program]
+// starts and when the window dimensions change so in many cases you will not
+// need to explicitly invoke this command.
+func WindowSize() Cmd {
+	return func() Msg {
+		return windowSizeMsg{}
+	}
+}
diff --git a/tea.go b/tea.go
@@ -422,6 +422,9 @@ func (p *Program) eventLoop(model Model, cmds chan Cmd) (Model, error) {
 
 			case setWindowTitleMsg:
 				p.SetWindowTitle(string(msg))
+
+			case windowSizeMsg:
+				p.checkResize()
 			}
 
 			// Process internal messages for the renderer.