aerc

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git clone git://git.danielmoch.com/aerc.git
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commit 46756487fb56acf26122a7b5d46be2ff8ee3c051
parent 384fe0d82691d55615655fc17a350f710dd4cf1c
Author: Drew DeVault <sir@cmpwn.com>
Date:   Tue, 27 Feb 2018 19:30:59 -0500

Add stack UI container

Diffstat:
Mcmd/aerc/main.go | 5++++-
Mlib/ui/grid.go | 14+++++++-------
Alib/ui/stack.go | 73+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 84 insertions(+), 8 deletions(-)

diff --git a/cmd/aerc/main.go b/cmd/aerc/main.go @@ -71,8 +71,11 @@ func main() { fill('.'), libui.BORDER_RIGHT)).At(1, 0).Span(2, 1) grid.AddChild(tabs.TabStrip).At(0, 1) grid.AddChild(tabs.TabContent).At(1, 1) + + statusbar := libui.NewStack() exline := widgets.NewExLine() - grid.AddChild(exline).At(2, 1) + statusbar.Push(exline) + grid.AddChild(statusbar).At(2, 1) ui, err := libui.Initialize(conf, grid) if err != nil { diff --git a/lib/ui/grid.go b/lib/ui/grid.go @@ -10,7 +10,7 @@ type Grid struct { rowLayout []gridLayout columns []GridSpec columnLayout []gridLayout - Cells []*GridCell + cells []*GridCell onInvalidate func(d Drawable) invalid bool } @@ -76,7 +76,7 @@ func (grid *Grid) Draw(ctx *Context) { if invalid { grid.reflow(ctx) } - for _, cell := range grid.Cells { + for _, cell := range grid.cells { if !cell.invalid && !invalid { continue } @@ -140,7 +140,7 @@ func (grid *Grid) invalidateLayout() { func (grid *Grid) Invalidate() { grid.invalidateLayout() - for _, cell := range grid.Cells { + for _, cell := range grid.cells { cell.Content.Invalidate() } } @@ -156,7 +156,7 @@ func (grid *Grid) AddChild(content Drawable) *GridCell { Content: content, invalid: true, } - grid.Cells = append(grid.Cells, cell) + grid.cells = append(grid.cells, cell) cell.Content.OnInvalidate(grid.cellInvalidated) cell.invalid = true grid.invalidateLayout() @@ -164,9 +164,9 @@ func (grid *Grid) AddChild(content Drawable) *GridCell { } func (grid *Grid) RemoveChild(cell *GridCell) { - for i, _cell := range grid.Cells { + for i, _cell := range grid.cells { if _cell == cell { - grid.Cells = append(grid.Cells[:i], grid.Cells[i+1:]...) + grid.cells = append(grid.cells[:i], grid.cells[i+1:]...) break } } @@ -175,7 +175,7 @@ func (grid *Grid) RemoveChild(cell *GridCell) { func (grid *Grid) cellInvalidated(drawable Drawable) { var cell *GridCell - for _, cell = range grid.Cells { + for _, cell = range grid.cells { if cell.Content == drawable { break } diff --git a/lib/ui/stack.go b/lib/ui/stack.go @@ -0,0 +1,73 @@ +package ui + +import ( + "fmt" + + tb "github.com/nsf/termbox-go" +) + +type Stack struct { + children []Drawable + onInvalidate func(d Drawable) +} + +func NewStack() *Stack { + return &Stack{} +} + +func (stack *Stack) OnInvalidate(onInvalidate func (d Drawable)) { + stack.onInvalidate = onInvalidate +} + +func (stack *Stack) Invalidate() { + if stack.onInvalidate != nil { + stack.onInvalidate(stack) + } +} + +func (stack *Stack) Draw(ctx *Context) { + if len(stack.children) > 0 { + stack.Peek().Draw(ctx) + } else { + cell := tb.Cell{ + Fg: tb.ColorDefault, + Bg: tb.ColorDefault, + Ch: ' ', + } + ctx.Fill(0, 0, ctx.Width(), ctx.Height(), cell) + } +} + +func (stack *Stack) Push(d Drawable) { + if len(stack.children) != 0 { + stack.Peek().OnInvalidate(nil) + } + stack.children = append(stack.children, d) + d.OnInvalidate(stack.invalidateFromChild) + stack.Invalidate() +} + +func (stack *Stack) Pop() Drawable { + if len(stack.children) == 0 { + panic(fmt.Errorf("Tried to pop from an empty UI stack")) + } + d := stack.children[len(stack.children)-1] + stack.children = stack.children[:len(stack.children)-1] + stack.Invalidate() + d.OnInvalidate(nil) + if len(stack.children) != 0 { + stack.Peek().OnInvalidate(stack.invalidateFromChild) + } + return d +} + +func (stack *Stack) Peek() Drawable { + if len(stack.children) == 0 { + panic(fmt.Errorf("Tried to peek from an empty stack")) + } + return stack.children[len(stack.children)-1] +} + +func (stack *Stack) invalidateFromChild(d Drawable) { + stack.Invalidate() +}