more work on new layout functionality

pkg/gui/arrangement.go

@@ -1,27 +1,40 @@
 package gui
 
-func (gui *Gui) getViewDimensions() map[string]dimensions {
-	width, height := gui.g.Size()
+func (gui *Gui) mainSectionChildren() []*box {
+	currentViewName := gui.currentViewName()
+
+	// if we're not in split mode we can just show the one main panel. Likewise if
+	// the main panel is focused and we're in full-screen mode
+	if !gui.State.SplitMainPanel || (gui.State.ScreenMode == SCREEN_FULL && currentViewName == "main") {
+		return []*box{
+			{
+				viewName: "main",
+				weight:   1,
+			},
+		}
+	}
 
 	main := "main"
 	secondary := "secondary"
-	if gui.State.Panels.LineByLine != nil && gui.State.Panels.LineByLine.SecondaryFocused {
+	if gui.secondaryViewFocused() {
+		// when you think you've focused the secondary view, we've actually just swapped them around in the layout
 		main, secondary = secondary, main
 	}
 
-	mainSectionChildren := []*box{
+	return []*box{
 		{
 			viewName: main,
 			weight:   1,
 		},
-	}
-
-	if gui.State.SplitMainPanel {
-		mainSectionChildren = append(mainSectionChildren, &box{
+		{
 			viewName: secondary,
 			weight:   1,
-		})
+		},
 	}
+}
+
+func (gui *Gui) getMidSectionWeights() (int, int) {
+	currentViewName := gui.currentViewName()
 
 	// we originally specified this as a ratio i.e. .20 would correspond to a weight of 1 against 4
 	sidePanelWidthRatio := gui.Config.GetUserConfig().GetFloat64("gui.sidePanelWidth")
@@ -32,7 +45,7 @@ func (gui *Gui) getViewDimensions() map[string]dimensions {
 	if gui.State.SplitMainPanel {
 		mainSectionWeight = 5 // need to shrink side panel to make way for main panels if side-by-side
 	}
-	currentViewName := gui.currentViewName()
+
 	if currentViewName == "main" {
 		if gui.State.ScreenMode == SCREEN_HALF || gui.State.ScreenMode == SCREEN_FULL {
 			sideSectionWeight = 0
@@ -45,6 +58,14 @@ func (gui *Gui) getViewDimensions() map[string]dimensions {
 		}
 	}
 
+	return sideSectionWeight, mainSectionWeight
+}
+
+func (gui *Gui) getViewDimensions() map[string]dimensions {
+	width, height := gui.g.Size()
+
+	sideSectionWeight, mainSectionWeight := gui.getMidSectionWeights()
+
 	sidePanelsDirection := COLUMN
 	portraitMode := width <= 84 && height > 50
 	if portraitMode {
@@ -73,7 +94,7 @@ func (gui *Gui) getViewDimensions() map[string]dimensions {
 						},
 						direction: COLUMN,
 						weight:    mainSectionWeight,
-						children:  mainSectionChildren,
+						children:  gui.mainSectionChildren(),
 					},
 				},
 			},

pkg/gui/dimensions.go

@@ -14,6 +14,16 @@ const (
 	COLUMN
 )
 
+// to give a high-level explanation of what's going on here. We layout our views by arranging a bunch of boxes in the window.
+// If a box has children, it needs to specify how it wants to arrange those children: ROW or COLUMN.
+// If a box represents a view, you can put the view name in the viewName field.
+// When determining how to divvy-up the available height (for row children) or width (for column children), we first
+// give the boxes with a static `size` the space that they want. Then we apportion
+// the remaining space based on the weights of the dynamic boxes (you can't define
+// both size and weight at the same time: you gotta pick one). If there are two
+// boxes, one with weight 1 and the other with weight 2, the first one gets 33%
+// of the available space and the second one gets the remaining 66%
+
 type box struct {
 	// direction decides how the children boxes are laid out. ROW means the children will each form a row i.e. that they will be stacked on top of eachother.
 	direction int // ROW or COLUMN

pkg/gui/layout.go

@@ -71,23 +71,27 @@ func (gui *Gui) onFocus(v *gocui.View) error {
 	return nil
 }
 
+func (gui *Gui) informationStr() string {
+	if gui.inDiffMode() {
+		return utils.ColoredString(fmt.Sprintf("%s %s %s", gui.Tr.SLocalize("showingGitDiff"), "git diff "+gui.diffStr(), utils.ColoredString(gui.Tr.SLocalize("(reset)"), color.Underline)), color.FgMagenta)
+	} else if gui.inFilterMode() {
+		return utils.ColoredString(fmt.Sprintf("%s '%s' %s", gui.Tr.SLocalize("filteringBy"), gui.State.FilterPath, utils.ColoredString(gui.Tr.SLocalize("(reset)"), color.Underline)), color.FgRed, color.Bold)
+	} else if len(gui.State.CherryPickedCommits) > 0 {
+		return utils.ColoredString(fmt.Sprintf("%d commits copied", len(gui.State.CherryPickedCommits)), color.FgCyan)
+	} else if gui.g.Mouse {
+		donate := color.New(color.FgMagenta, color.Underline).Sprint(gui.Tr.SLocalize("Donate"))
+		return donate + " " + gui.Config.GetVersion()
+	} else {
+		return gui.Config.GetVersion()
+	}
+}
+
 // layout is called for every screen re-render e.g. when the screen is resized
 func (gui *Gui) layout(g *gocui.Gui) error {
 	g.Highlight = true
 	width, height := g.Size()
 
-	information := gui.Config.GetVersion()
-	if gui.g.Mouse {
-		donate := color.New(color.FgMagenta, color.Underline).Sprint(gui.Tr.SLocalize("Donate"))
-		information = donate + " " + information
-	}
-	if gui.inDiffMode() {
-		information = utils.ColoredString(fmt.Sprintf("%s %s %s", gui.Tr.SLocalize("showingGitDiff"), "git diff "+gui.diffStr(), utils.ColoredString(gui.Tr.SLocalize("(reset)"), color.Underline)), color.FgMagenta)
-	} else if gui.inFilterMode() {
-		information = utils.ColoredString(fmt.Sprintf("%s '%s' %s", gui.Tr.SLocalize("filteringBy"), gui.State.FilterPath, utils.ColoredString(gui.Tr.SLocalize("(reset)"), color.Underline)), color.FgRed, color.Bold)
-	} else if len(gui.State.CherryPickedCommits) > 0 {
-		information = utils.ColoredString(fmt.Sprintf("%d commits copied", len(gui.State.CherryPickedCommits)), color.FgCyan)
-	}
+	information := gui.informationStr()
 
 	minimumHeight := 9
 	minimumWidth := 10

pkg/gui/view_helpers.go

@@ -567,3 +567,8 @@ func (gui *Gui) wrappedHandler(f func() error) func(g *gocui.Gui, v *gocui.View)
 		return f()
 	}
 }
+
+// secondaryViewFocused tells us whether it appears that the secondary view is focused. The view is actually never focused for real: we just swap the main and secondary views and then you're still focused on the main view so that we can give you access to all its keybindings for free. I will probably regret this design decision soon enough.
+func (gui *Gui) secondaryViewFocused() bool {
+	return gui.State.Panels.LineByLine != nil && gui.State.Panels.LineByLine.SecondaryFocused
+}