window history

1 files changed, 38 insertions, 0 deletions

diff --git a/client/navigation.go b/client/navigation.go
new file mode 100644
index 0000000..e418445
--- /dev/null
+++ b/client/navigation.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"citrons.xyz/talk/client/window"
+)
+
+func (a *application) removeFromHistory(location window.Location) {
+	for i := len(a.windowHist) - 1; i >= 0; i-- {
+		if a.windowHist[i] != location {
+			continue
+		}
+		if i < len(a.windowHist) - 1 {
+			a.windowHist = append(a.windowHist[:i], a.windowHist[i + 1:]...)
+		} else {
+			a.windowHist = a.windowHist[:i]
+		}
+		break
+	}
+}
+
+func (a *application) traverseHistory(direction int) {
+	var i int
+	for i = 0; i < len(a.windowHist); i++ {
+		if a.windowHist[i] == a.currentWindow {
+			break
+		}
+	}
+	i += direction
+	if i >= 0 && i < len(a.windowHist) {
+		a.currentWindow = a.windowHist[i]
+	}
+}
+
+func (a *application) goTo(location window.Location) {
+	a.removeFromHistory(location)
+	a.windowHist = append(a.windowHist, location)
+	a.currentWindow = location
+}