commit 1ff925de14c898dee92c272733f4f74e950cc3b4
parent 05f19e01c8d9cd97f171eaf6a5d469129e9e97af
Author: Jack Mordaunt <jackmordaunt@gmail.com>
Date: Thu, 6 May 2021 17:19:04 +0800
feat(preview): gui for previewing icns icon files
Signed-off-by: Jack Mordaunt <jackmordaunt@gmail.com>
Diffstat:
5 files changed, 378 insertions(+), 17 deletions(-)
diff --git a/cmd/app/main.go b/cmd/app/main.go
@@ -1,6 +0,0 @@
-// App implements a GUI for the icns utility.
-package main
-
-func main() {
-
-}
diff --git a/cmd/preview/main.go b/cmd/preview/main.go
@@ -0,0 +1,222 @@
+// Previwer GUI for `.icns` icons.
+package main
+
+import (
+ "fmt"
+ "image"
+ "image/color"
+ "log"
+ "os"
+ "path/filepath"
+ "strconv"
+
+ "gioui.org/app"
+ "gioui.org/font/gofont"
+ "gioui.org/io/pointer"
+ "gioui.org/io/system"
+ "gioui.org/layout"
+ l "gioui.org/layout"
+ "gioui.org/op"
+ "gioui.org/op/paint"
+ "gioui.org/unit"
+ "gioui.org/widget"
+ m "gioui.org/widget/material"
+ c "gioui.org/x/component"
+ "github.com/jackmordaunt/icns"
+ "github.com/ncruces/zenity"
+)
+
+func main() {
+ go func() {
+ ui := UI{
+ Window: app.NewWindow(app.Title("icnsify"), app.MinSize(unit.Dp(700), unit.Dp(250))),
+ Th: m.NewTheme(gofont.Collection()),
+ }
+ if err := ui.Loop(); err != nil {
+ log.Fatalf("error: %v", err)
+ }
+ os.Exit(0)
+ }()
+ app.Main()
+}
+
+type (
+ C = l.Context
+ D = l.Dimensions
+)
+
+// UI contains all state for the UI.
+type UI struct {
+ *app.Window
+ Th *m.Theme
+
+ // Preview points to the currently selected icon to render in the preview area.
+ Preview *widget.Image
+ // Icons contains all the different resolutions found in the icns file.
+ Icons []widget.Image
+ // FileName is the name of the source icon file on disk.
+ FileName string
+
+ OpenBtn widget.Clickable
+ SideBar layout.List
+}
+
+// Loop initializes UI state and starts the render loop.
+func (ui *UI) Loop() error {
+ var (
+ ops op.Ops
+ events = ui.Window.Events()
+ )
+ for event := range events {
+ switch event := (event).(type) {
+ case system.DestroyEvent:
+ return event.Err
+ case system.FrameEvent:
+ gtx := l.NewContext(&ops, event)
+ ui.Update(gtx)
+ ui.Layout(gtx)
+ event.Frame(gtx.Ops)
+ }
+ }
+ return nil
+}
+
+// Update the UI state.
+func (ui *UI) Update(gtx C) {
+ ui.SideBar.Axis = l.Vertical
+ if ui.OpenBtn.Clicked() {
+ if err := func() error {
+ file, err := zenity.SelectFile()
+ if err != nil {
+ return fmt.Errorf("selecting file: %w", err)
+ }
+ f, err := os.Open(file)
+ if err != nil {
+ return err
+ }
+ defer f.Close()
+ imgs, err := icns.DecodeAll(f)
+ if err != nil {
+ return fmt.Errorf("decoding: %w", err)
+ }
+ ui.Icons = ui.Icons[:]
+ for _, img := range imgs {
+ ui.Icons = append(ui.Icons, widget.Image{
+ Src: paint.NewImageOp(img),
+ Fit: widget.Contain,
+ Position: l.Center,
+ })
+ }
+ if len(ui.Icons) > 0 {
+ ui.Preview = &ui.Icons[0]
+ }
+ ui.FileName = filepath.Base(file)
+ return nil
+ }(); err != nil {
+ // TODO(jfm): Push to dismissable error stack.
+ log.Printf("opening icns: %v", err)
+ }
+ }
+ for ii := range ui.Icons {
+ for _, event := range gtx.Events(ui.Icons[ii]) {
+ if c, ok := event.(pointer.Event); ok && c.Type == pointer.Release {
+ ui.Preview = &ui.Icons[ii]
+ }
+ }
+ }
+}
+
+// Layout the UI.
+func (ui *UI) Layout(gtx C) D {
+ return l.Flex{
+ Axis: l.Horizontal,
+ }.Layout(
+ gtx,
+ l.Rigid(func(gtx C) D { return ui.LayoutSideBar(gtx) }),
+ l.Flexed(1, func(gtx C) D { return ui.LayoutPreviewArea(gtx) }),
+ )
+}
+
+var (
+ // ThumbnailWidth specifies how wide the sidebar thumbnails should be.
+ ThumbnailWidth = unit.Dp(125)
+ // SelectedHighlight specifies the color to render behind the selected thumbnail.
+ SelectedHighlight = color.NRGBA{A: 50}
+)
+
+// LayoutSideBar displays a sidebar which contains a list of thumbnails for the various icns
+// resolutions.
+func (ui *UI) LayoutSideBar(gtx C) D {
+ return l.Flex{
+ Axis: l.Vertical,
+ Alignment: l.Middle,
+ }.Layout(
+ gtx,
+ l.Rigid(func(gtx C) D {
+ return l.UniformInset(unit.Dp(5)).Layout(gtx, func(gtx C) D {
+ return m.Label(ui.Th, unit.Dp(15), ui.FileName).Layout(gtx)
+ })
+ }),
+ l.Flexed(1, func(gtx C) D {
+ return ui.SideBar.Layout(gtx, len(ui.Icons), func(gtx C, ii int) D {
+ return l.UniformInset(unit.Dp(15)).Layout(gtx, func(gtx C) D {
+ cs := >x.Constraints
+ cs.Max.X = gtx.Px(ThumbnailWidth)
+ return ui.LayoutThumbnail(gtx, ii)
+ })
+ })
+ }),
+ )
+}
+
+// LayoutPreviewArea displays the selected icon resultion scaled to the size of the area.
+func (ui *UI) LayoutPreviewArea(gtx C) D {
+ return l.Center.Layout(gtx, func(gtx C) D {
+ if ui.Preview == nil {
+ btn := m.Button(ui.Th, &ui.OpenBtn, "Open")
+ btn.TextSize = unit.Dp(25)
+ return btn.Layout(gtx)
+ }
+ return ui.Preview.Layout(gtx)
+ })
+}
+
+// LayoutThumbnail displays a specific icon thumbnail.
+func (ui *UI) LayoutThumbnail(gtx C, ii int) D {
+ return l.Stack{}.Layout(
+ gtx,
+ l.Stacked(func(gtx C) D {
+ return l.Flex{
+ Axis: l.Vertical,
+ Alignment: l.Middle,
+ }.Layout(
+ gtx,
+ l.Rigid(func(gtx C) D {
+ return ui.Icons[ii].Layout(gtx)
+ }),
+ l.Rigid(func(gtx C) D {
+ return m.Label(ui.Th, unit.Dp(15), strconv.Itoa(ii+1)).
+ Layout(gtx)
+ }),
+ )
+ }),
+ l.Expanded(func(gtx C) D {
+ if ui.Icons[ii] == *ui.Preview {
+ return c.Rect{
+ Size: gtx.Constraints.Min,
+ Color: SelectedHighlight,
+ Radii: 4,
+ }.Layout(gtx)
+ }
+ return D{}
+ }),
+ l.Expanded(func(gtx C) D {
+ pointer.Rect(image.Rectangle{Max: gtx.Constraints.Min}).Add(gtx.Ops)
+ pointer.InputOp{
+ Tag: ui.Icons[ii],
+ Types: pointer.Release,
+ }.Add(gtx.Ops)
+ return D{}
+ }),
+ )
+}
diff --git a/cmd/preview/readme.md b/cmd/preview/readme.md
@@ -0,0 +1,4 @@
+# preview
+
+Preview is a simple `.icns` image previewer. Lets you view your icons on non-Mac systems!
+Design mimics macOS previwer for familiarity sake.
diff --git a/go.mod b/go.mod
@@ -3,9 +3,15 @@ module github.com/jackmordaunt/icns
go 1.14
require (
+ gioui.org v0.0.0-20210504193539-82fff0178bed
+ gioui.org/x v0.0.0-20210503123353-221e50123e52
+ github.com/ncruces/zenity v0.7.1
github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
- github.com/pkg/errors v0.8.0
- github.com/spf13/afero v1.1.2
- github.com/spf13/pflag v1.0.3
- golang.org/x/text v0.3.0 // indirect
+ github.com/pkg/errors v0.9.1
+ github.com/spf13/afero v1.6.0
+ github.com/spf13/pflag v1.0.5
+ golang.org/x/exp v0.0.0-20210503015746-b3083d562e1d // indirect
+ golang.org/x/image v0.0.0-20210504121937-7319ad40d33e // indirect
+ golang.org/x/sys v0.0.0-20210503173754-0981d6026fa6 // indirect
+ golang.org/x/text v0.3.6 // indirect
)
diff --git a/go.sum b/go.sum
@@ -1,10 +1,145 @@
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+dmitri.shuralyov.com/gpu/mtl v0.0.0-20201218220906-28db891af037/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
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