From 49baf8425a286cd58d1e6563b855a230399dcc25 Mon Sep 17 00:00:00 2001
From: Alex Goodman <wagoodman@gmail.com>
Date: Sat, 24 Nov 2018 20:20:06 -0500
Subject: [PATCH] configurable filetree split col (addresses #69)

---
 cmd/root.go | 3 +++
 ui/ui.go    | 8 +++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/cmd/root.go b/cmd/root.go
index 23d1537..3cf10bb 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -97,8 +97,11 @@ func initConfig() {
 	viper.SetDefault("keybinding.page-down", "pgdn")
 
 	viper.SetDefault("diff.hide", "")
+
 	viper.SetDefault("layer.show-aggregated-changes", false)
+
 	viper.SetDefault("filetree.collapse-dir", false)
+	viper.SetDefault("filetree.pane-width", 0.5)
 
 	viper.AutomaticEnv() // read in environment variables that match
 
diff --git a/ui/ui.go b/ui/ui.go
index 13fb299..8948516 100644
--- a/ui/ui.go
+++ b/ui/ui.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"github.com/fatih/color"
 	"github.com/jroimartin/gocui"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/viper"
 	"github.com/wagoodman/dive/filetree"
 	"github.com/wagoodman/dive/image"
@@ -188,7 +189,12 @@ func layout(g *gocui.Gui) error {
 	// TODO: this logic should be refactored into an abstraction that takes care of the math for us
 
 	maxX, maxY := g.Size()
-	splitCols := maxX / 2
+	fileTreeSplitRatio := viper.GetFloat64("filetree.pane-width")
+	if fileTreeSplitRatio >= 1 || fileTreeSplitRatio <= 0 {
+		logrus.Errorf("invalid config value: 'filetree.pane-width' should be 0 < value < 1, given '%v'", fileTreeSplitRatio)
+		fileTreeSplitRatio = 0.5
+	}
+	splitCols := int(float64(maxX) * (1.0-fileTreeSplitRatio))
 	debugWidth := 0
 	if debug {
 		debugWidth = maxX / 4