优化2

internal/app/gui.go

@@ -2,7 +2,9 @@ package app
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
+	"image/color"
 	"io"
 	"os"
 	"strings"
@@ -12,6 +14,7 @@ import (
 	fyneapp "fyne.io/fyne/v2/app"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/theme"
 	"fyne.io/fyne/v2/widget"
 
 	"updata_hfb/internal/hfb"
@@ -66,13 +69,13 @@ func Run() {
 	dataEntry.SetMinRowsVisible(14)
 	dataEntry.SetPlaceHolder(sampleText)
 
-	resultView := widget.NewRichTextWithText("")
-	resultView.Wrapping = fyne.TextWrapWord
+	resultView := newResultPanel(420)
+	resultView.SetText("```text\n暂无结果\n点击“预览 JSON”或“上传”后，这里会显示多行结果。\n```")
 
 	statusLabel := widget.NewLabel("准备就绪")
 
 	setResult := func(text string) {
-		resultView.ParseMarkdown("```json\n" + strings.TrimSpace(text) + "\n```")
+		resultView.SetText(formatResultText(text))
 	}
 	setBusy := func(uploadBtn *widget.Button, previewBtn *widget.Button, busy bool) {
 		if busy {
@@ -195,7 +198,7 @@ func Run() {
 			widget.NewLabel("账号数据"),
 			dataEntry,
 			widget.NewLabel("结果"),
-			newMinHeightScroll(resultView, 420),
+			resultView,
 		)),
 	)
 
@@ -240,29 +243,76 @@ func prefStringWithFallback(prefs fyne.Preferences, key, fallback string) string
 	return fallback
 }
 
-type minHeightScroll struct {
+func formatResultText(text string) string {
+	text = strings.TrimSpace(text)
+	if text == "" {
+		return "暂无结果"
+	}
+	var payload any
+	if err := json.Unmarshal([]byte(text), &payload); err == nil {
+		if pretty, err := json.MarshalIndent(payload, "", "  "); err == nil {
+			return "```json\n" + string(pretty) + "\n```"
+		}
+	}
+	return "```text\n" + text + "\n```"
+}
+
+type resultPanel struct {
 	widget.BaseWidget
-	scroll    fyne.CanvasObject
+	scroll    *container.Scroll
+	content   *widget.RichText
 	minHeight float32
 }
 
-func newMinHeightScroll(content fyne.CanvasObject, minHeight float32) *minHeightScroll {
-	panel := &minHeightScroll{
-		scroll:    container.NewVScroll(content),
+func newResultPanel(minHeight float32) *resultPanel {
+	panel := &resultPanel{
+		content:   widget.NewRichTextFromMarkdown(""),
 		minHeight: minHeight,
 	}
+	panel.scroll = container.NewVScroll(panel.content)
 	panel.ExtendBaseWidget(panel)
 	return panel
 }
 
-func (p *minHeightScroll) CreateRenderer() fyne.WidgetRenderer {
-	return widget.NewSimpleRenderer(p.scroll)
+func (p *resultPanel) SetText(text string) {
+	p.content.ParseMarkdown(text)
+	p.Refresh()
 }
 
-func (p *minHeightScroll) MinSize() fyne.Size {
-	size := p.scroll.MinSize()
-	if size.Height < p.minHeight {
-		size.Height = p.minHeight
+func (p *resultPanel) CreateRenderer() fyne.WidgetRenderer {
+	return &resultPanelRenderer{panel: p}
+}
+
+type resultPanelRenderer struct {
+	panel *resultPanel
+}
+
+func (r *resultPanelRenderer) Layout(size fyne.Size) {
+	r.panel.scroll.Resize(size)
+	r.panel.scroll.Move(fyne.NewPos(0, 0))
+}
+
+func (r *resultPanelRenderer) MinSize() fyne.Size {
+	size := r.panel.scroll.MinSize()
+	if size.Height < r.panel.minHeight {
+		size.Height = r.panel.minHeight
+	}
+	if size.Width < 1 {
+		size.Width = 1
 	}
 	return size
 }
+
+func (r *resultPanelRenderer) Refresh() {
+	r.panel.scroll.Refresh()
+}
+
+func (r *resultPanelRenderer) BackgroundColor() color.Color {
+	return theme.Color(theme.ColorNameBackground)
+}
+
+func (r *resultPanelRenderer) Objects() []fyne.CanvasObject {
+	return []fyne.CanvasObject{r.panel.scroll}
+}
+
+func (r *resultPanelRenderer) Destroy() {}