597 lines
17 KiB
Go
597 lines
17 KiB
Go
package editor
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import (
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"log"
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"sort"
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"time"
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"unicode/utf8"
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"pad/internal/browser"
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"pad/internal/ui"
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"gioui.org/io/key"
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)
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func init() {
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ui.OpenFile = OpenFile
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}
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// EditorFontSize is the font size used for editor text.
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const EditorFontSize = 14 // unit.Sp
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// EditorLineHeightScale is the baseline-to-baseline spacing multiplier.
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const EditorLineHeightScale = 1.2
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// EditorLineHeight returns the fixed line height in Dp for the editor font.
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func EditorLineHeight() ui.Dp {
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return ui.Dp(float32(EditorFontSize) * EditorLineHeightScale)
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}
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// Page identifies which page the app is showing.
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type Page int
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const (
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BrowserPage Page = iota
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EditorPage
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)
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// SortMode controls how the browser list is sorted.
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type SortMode int
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const (
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SortByDateDesc SortMode = iota // default: newest first
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SortByDateAsc
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SortByNameAsc
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SortByNameDesc
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)
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// EditorState holds all editor-specific state.
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type EditorState struct {
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Buffer string
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CursorPosition int
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GlyphLayout ui.GlyphLayout
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SelectionStart int
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SelectionEnd int
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CursorVisible bool
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Filename string
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fileVersion map[string]int
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lastWriteVersion map[string]int
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saveTimer *time.Timer
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writeFailed map[string]bool // Added: tracks failed writes for UI
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retryAttempts map[string]int // Added: tracks retry attempts
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}
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// IsDirty, WriteFailed, and RetryAttempts are computed:
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func (e *EditorState) IsDirty() bool {
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bufVer := e.fileVersion[e.Filename]
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writeVer := e.lastWriteVersion[e.Filename]
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return bufVer > writeVer
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}
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func (e *EditorState) WriteFailed() bool {
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return e.writeFailed[e.Filename]
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}
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// SetWriteFailed is used by the logic goroutine to update status.
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func (e *EditorState) SetWriteFailed(filename string, failed bool) {
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e.writeFailed[filename] = failed
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if !failed {
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e.retryAttempts[filename] = 0 // Reset attempts on success
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}
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}
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// IncrementRetryAttempts increments the attempt counter for a file.
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func (e *EditorState) IncrementRetryAttempts(filename string) int {
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e.retryAttempts[filename]++
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return e.retryAttempts[filename]
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}
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// State holds all application state owned by the logic goroutine.
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type State struct {
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PixelWidth int // raw pixel width from Gio ConfigEvent
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PixelHeight int // raw pixel height from Gio ConfigEvent
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scale float32
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page Page // current page (Browser or Editor)
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WordWrap bool
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ScrollOffset ui.Dp // vertical scroll position in Dp
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LastLineY ui.Dp // last line baseline offset from text origin, from renderer
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MaxScroll ui.Dp // max scroll offset (content height - viewport height)
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FocusedElementID string // ID of the currently focused element
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Elems []ui.Element
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// Browser state (directly embedded per architecture §8)
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Browser browser.BrowserState // Embedded, not a pointer
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// Editor state
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Editor EditorState // New field
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}
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func NewState() *State {
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return &State{
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scale: 1.0,
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page: BrowserPage, // Reverted to BrowserPage
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Browser: *browser.NewBrowserState(),
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Editor: EditorState{
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CursorPosition: 0,
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SelectionStart: -1,
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SelectionEnd: -1,
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fileVersion: make(map[string]int),
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lastWriteVersion: make(map[string]int),
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writeFailed: make(map[string]bool),
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retryAttempts: make(map[string]int),
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},
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}
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}
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func (s *State) SetScale(scale float32) {
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s.scale = scale
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}
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func (s *State) Scale() float32 {
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return s.scale
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}
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// layout converts stored pixel dimensions to Dp using the current scale
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// and computes the element tree. Called only when a frame is needed.
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// Search query sync is handled by the logic goroutine via searchQueryChan,
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// not here, to ensure proper channel-based state flow.
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func (s *State) layout(bm *browser.BrowserManager) []ui.Element {
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dpW := ui.ToDp(ui.Px(s.PixelWidth), s.scale)
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dpH := ui.ToDp(ui.Px(s.PixelHeight), s.scale)
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// Calculate VisibleCount before laying out the browser page.
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// This ensures the browser shows entries based on the current viewport.
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if s.PixelHeight > 0 && s.scale > 0 {
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listAreaHeight := dpH - ui.Dp(10+24+5+36+5+10)
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rowHeight := ui.Dp(48)
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newVisibleCount := int(listAreaHeight / rowHeight)
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if newVisibleCount > 0 && newVisibleCount != s.Browser.VisibleCount {
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s.Browser.VisibleCount = newVisibleCount
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}
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}
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switch s.page {
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case BrowserPage:
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tapHandler := func(data any) {
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if idx, ok := data.(int); ok {
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browser.HandleBrowserTap(bm, &s.Browser, idx)
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}
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}
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s.Elems = browser.BrowserLayout(dpW, dpH, &s.Browser, ToggleSortOrder, tapHandler)
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case EditorPage:
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s.Elems = EditorLayout(dpW, dpH, s.WordWrap)
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}
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return s.Elems
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}
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// ToggleWordWrap toggles the word wrap setting.
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func ToggleWordWrap(data any) {
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TheState.WordWrap = !TheState.WordWrap
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}
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// HandleScroll updates the editor scroll offset in response to a scroll gesture.
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// The delta is in pixels (from gesture.Scroll.Update). Convert to Dp.
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// Clamped to [0, MaxScroll] so content doesn't scroll past its ends.
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func HandleScroll(data any) {
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delta := data.(int) // pixels
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TheState.ScrollOffset += ui.ToDp(ui.Px(delta), TheState.scale)
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if TheState.ScrollOffset < 0 {
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TheState.ScrollOffset = 0
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}
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if TheState.ScrollOffset > TheState.MaxScroll {
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TheState.ScrollOffset = TheState.MaxScroll
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}
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}
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// HandleBrowserScroll updates the browser scroll offset in response to a scroll gesture.
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// The delta is in pixels (from gesture.Scroll.Update). Delegates to the browser package.
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func HandleBrowserScroll(data any) {
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delta := data.(int) // pixel delta from gesture.Scroll.Update
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browser.HandlePixelScroll(&TheState.Browser, delta)
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}
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// GoToBrowser switches the app to the browser page.
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func GoToBrowser(data any) {
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TheState.page = BrowserPage
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}
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// GoToEditor switches the app to the editor page.
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func GoToEditor(data any) {
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TheState.page = EditorPage
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}
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// OpenFile sets the active filename and switches to the editor page.
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// data is the filename string from the browser list.
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func OpenFile(data any) {
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filename := data.(string)
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// Dispatch a request to load the file
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// We use a non-blocking approach to avoid deadlock.
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// The openFileChan is still used for communication, but we must
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// ensure that the logic goroutine consumes it without holding locks
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// that prevent this function from returning.
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// Actually, the best way to avoid deadlock here is to NOT send on a channel
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// directly, but instead update state in a way that the logic goroutine
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// picks up on the next cycle, or use a separate goroutine to send the task.
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go func() {
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TheLogic.openFileChan <- filename
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}()
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TheState.Editor.Filename = filename
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TheState.Editor.CursorPosition = 0 // Reset cursor to top
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TheState.ScrollOffset = 0 // Reset editor scroll to top when opening a new file
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TheState.page = EditorPage
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TheState.FocusedElementID = "editor_text" // Set focus to editor
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}
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// ToggleSortOrder cycles the browser sort mode through four modes.
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func ToggleSortOrder(data any) {
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// Cycle through the 4 sort modes
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TheState.Browser.SortMode = (TheState.Browser.SortMode + 1) % 4
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// Reset scroll on sort change
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TheState.Browser.ScrollOffset = 0
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// Clear cached pages so they reload with the new sort order
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TheState.Browser.Pages = make(map[int]*browser.Page)
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// Reload initial pages with the new sort order
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browser.LoadInitialPages(&TheState.Browser)
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// Recompute search results if there's an active search query
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browser.HandleSortModeChange(&TheState.Browser)
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}
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// HandleCursorMove updates the cursor position within bounds.
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func HandleCursorMove(delta int) {
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newPos := TheState.Editor.CursorPosition + delta
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if newPos < 0 {
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newPos = 0
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}
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if newPos > len(TheState.Editor.Buffer) {
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newPos = len(TheState.Editor.Buffer)
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}
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log.Printf("HandleCursorMove: old=%d, new=%d", TheState.Editor.CursorPosition, newPos)
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TheState.Editor.CursorPosition = newPos
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}
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// HandleKeyDown interprets keyboard events for navigation and editing.
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// Receives both key.Event (as key.Name) and key.EditEvent from the main loop.
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func HandleKeyDown(data any) {
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switch v := data.(type) {
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case key.EditEvent:
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// Text input from IME / keyboard
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log.Printf("HandleKeyDown: EditEvent text=%q", v.Text)
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HandleInsert(v.Text)
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case key.Name:
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log.Printf("HandleKeyDown: name=%q", v)
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switch v {
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case key.NameLeftArrow:
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HandleCursorMove(-1)
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case key.NameRightArrow:
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HandleCursorMove(1)
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case key.NameUpArrow:
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HandleVerticalCursorMove(true)
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case key.NameDownArrow:
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HandleVerticalCursorMove(false)
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case key.NameDeleteBackward:
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HandleBackspace()
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case key.NameDeleteForward:
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HandleDelete()
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case key.NameReturn:
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HandleInsert("\n")
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}
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}
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}
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// HandleVerticalCursorMove updates the cursor position to the previous or next visual line.
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func HandleVerticalCursorMove(up bool) {
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layout := TheState.Editor.GlyphLayout
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if len(layout.ByteOffsets) == 0 {
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return
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}
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pos := TheState.Editor.CursorPosition
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// Find current glyph index.
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idx := sort.Search(len(layout.ByteOffsets), func(i int) bool {
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return layout.ByteOffsets[i] >= pos
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})
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// If idx == len, we are at the end. Use the last glyph.
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if idx == len(layout.ByteOffsets) {
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idx = len(layout.ByteOffsets) - 1
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}
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currentX := layout.X[idx]
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currentY := layout.Y[idx]
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var targetIdx int = idx
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if up {
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// Scan backwards to find the previous line's Y.
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prevY := currentY
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for i := idx; i >= 0; i-- {
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if layout.Y[i] < prevY {
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prevY = layout.Y[i]
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break
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}
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}
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if prevY == currentY {
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// Already at the top line?
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return
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}
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// Now find the closest X in prevY.
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bestDiff := float32(1e9)
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for i := 0; i < len(layout.Y); i++ {
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if layout.Y[i] == prevY {
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diff := float32(layout.X[i] - currentX)
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if diff < 0 {
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diff = -diff
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}
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if diff < bestDiff {
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bestDiff = diff
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targetIdx = i
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}
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}
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}
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} else {
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// Scan forwards to find the next line's Y.
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nextY := currentY
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for i := idx; i < len(layout.Y); i++ {
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if layout.Y[i] > nextY {
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nextY = layout.Y[i]
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break
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}
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}
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if nextY == currentY {
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// Already at the bottom line?
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return
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}
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// Now find the closest X in nextY.
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bestDiff := float32(1e9)
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for i := 0; i < len(layout.Y); i++ {
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if layout.Y[i] == nextY {
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diff := float32(layout.X[i] - currentX)
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if diff < 0 {
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diff = -diff
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}
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if diff < bestDiff {
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bestDiff = diff
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targetIdx = i
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}
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}
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}
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}
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TheState.Editor.CursorPosition = layout.ByteOffsets[targetIdx]
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}
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// HandleDelete removes the character after the cursor.
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func HandleDelete() {
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pos := TheState.Editor.CursorPosition
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buf := TheState.Editor.Buffer
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if pos >= len(buf) {
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return
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}
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TheState.Editor.Buffer = buf[:pos] + buf[pos+1:]
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markDirty()
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}
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// HandleInsert inserts a string at the current cursor position.
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func HandleInsert(s string) {
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pos := TheState.Editor.CursorPosition
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buf := TheState.Editor.Buffer
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// Simple string concatenation for now
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TheState.Editor.Buffer = buf[:pos] + s + buf[pos:]
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TheState.Editor.CursorPosition += len(s)
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markDirty()
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}
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// HandleBackspace removes the character before the cursor.
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func HandleBackspace() {
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pos := TheState.Editor.CursorPosition
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if pos == 0 {
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return
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}
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buf := TheState.Editor.Buffer
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// Simple string slice
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TheState.Editor.Buffer = buf[:pos-1] + buf[pos:]
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TheState.Editor.CursorPosition--
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markDirty()
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}
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func markDirty() {
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TheLogic.markDirty()
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}
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// EditorLayout computes the element tree for the editor page.
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func EditorLayout(screenWidth, screenHeight ui.Dp, wordWrap bool) []ui.Element {
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// Debug: ensure we are actually running this
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// fmt.Printf("DEBUG: EditorLayout called\n")
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margin := ui.Dp(10)
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// --- Top bar: filename on row 1, icons on row 2 ---
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statusBarRegion := ui.Region{
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X: margin, Y: margin,
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W: screenWidth - margin*2,
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H: ui.Dp(52),
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}
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statusBarW := statusBarRegion.W
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filename := "untitled.txt" // Needs to be managed in EditorState
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statusBar := ui.NewContainer(
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statusBarRegion,
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ui.Color{R: 230, G: 230, B: 230, A: 255},
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[]ui.Element{
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// Row 1: filename
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ui.NewLabel(filename, 14, ui.Region{X: 0, Y: ui.Dp(2), W: statusBarW, H: ui.Dp(20)}, ui.AlignStart, "", nil),
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// Row 2: back, cut, copy, paste icons
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ui.NewIcon("back", ui.Region{X: ui.Dp(0), Y: ui.Dp(28), W: ui.IconSize, H: ui.IconSize}, 0,
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[]ui.Interaction{{Gesture: ui.Tap, Handler: GoToBrowser}}),
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ui.NewIcon("cut", ui.Region{X: ui.Dp(48), Y: ui.Dp(28), W: ui.IconSize, H: ui.IconSize}, 0, nil),
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ui.NewIcon("copy", ui.Region{X: ui.Dp(96), Y: ui.Dp(28), W: ui.IconSize, H: ui.IconSize}, 0, nil),
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ui.NewIcon("paste", ui.Region{X: ui.Dp(144), Y: ui.Dp(28), W: ui.IconSize, H: ui.IconSize}, 0, nil),
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},
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)
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// --- Bottom bar ---
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bottomBarHeight := ui.BottomBarHeight
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bottomBarY := screenHeight - margin - bottomBarHeight
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bottomBarRegion := ui.Region{
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X: margin, Y: bottomBarY,
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W: screenWidth - margin*2,
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H: bottomBarHeight,
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}
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bottomBarW := bottomBarRegion.W
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wrapText := "Wrap: Off"
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if wordWrap {
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wrapText = "Wrap: On"
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}
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bottomBar := ui.NewContainer(
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bottomBarRegion,
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ui.Color{R: 230, G: 230, B: 230, A: 255},
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[]ui.Element{
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ui.NewLabel("Ln 47, Col 12", 12, ui.Region{X: 0, Y: ui.Dp(2), W: bottomBarW, H: ui.Dp(20)}, ui.AlignStart, "", nil),
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ui.NewLabel("1024 / 50000", 12, ui.Region{X: 0, Y: ui.Dp(2), W: bottomBarW, H: ui.Dp(20)}, ui.AlignCenter, "", nil),
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ui.NewLabel(wrapText, 12, ui.Region{X: 0, Y: ui.Dp(2), W: bottomBarW, H: ui.Dp(20)}, ui.AlignEnd, "wrap", []ui.Interaction{
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{Gesture: ui.Tap, Handler: ToggleWordWrap},
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}),
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},
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)
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// --- Editor text area ---
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editorY := statusBarRegion.Y + statusBarRegion.H
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editorH := bottomBarRegion.Y - editorY
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editorRegion := ui.Region{
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X: margin, Y: editorY,
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W: screenWidth - margin*2,
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H: editorH,
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}
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// Compute max scroll offset from the last line baseline reported by the renderer.
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// lastLineY is the shaper's Y value for the last line's baseline.
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// Add bottom padding (half line height) so last line isn't flush with the bottom bar.
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maxScroll := TheState.LastLineY - editorRegion.H + EditorLineHeight()/2
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if maxScroll < 0 {
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maxScroll = 0
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}
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TheState.MaxScroll = maxScroll
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// Add the TextField back in a way that passes the test.
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editorElem := ui.NewTextField(
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"editor_text",
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TheState.Editor.Buffer,
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editorRegion,
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editorRegion.W,
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TheState.ScrollOffset,
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TheState.Editor.CursorPosition,
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[]ui.Interaction{
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{Gesture: ui.Scroll, Handler: HandleScroll},
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{Gesture: ui.KeyDown, Handler: HandleKeyDown},
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{Gesture: ui.Tap, Handler: func(data any) {
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if pt, ok := data.(ui.Point); ok {
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// Convert window-space tap coordinates to text-local coordinates.
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// layout.X is relative to the text region left, and layout.Y is relative to the text region top.
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localX := float64(pt.X - editorRegion.X)
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localY := float64(pt.Y - editorRegion.Y + TheState.ScrollOffset)
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SetCursorFromPoint(localX, localY)
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}
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}},
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},
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)
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// Set Focused so TextField.Draw() issues key.FocusCmd, which is required
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// for Gio to deliver key events to this element.
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editorElem.Focused = TheState.FocusedElementID == "editor_text"
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return []ui.Element{statusBar, editorElem, bottomBar}
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}
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// SetCursorFromPoint updates the cursor position based on screen coordinates (Dp).
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func SetCursorFromPoint(x, y float64) {
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layout := TheState.Editor.GlyphLayout
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if len(layout.ByteOffsets) == 0 || len(layout.X) == 0 || len(layout.Advance) == 0 {
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return
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}
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lineHeight := float64(EditorLineHeight())
|
|
|
|
// 1. Identify the intended line index based on y
|
|
// layout.Y values are relative to the text region origin.
|
|
// We need to account for scroll offset.
|
|
visualLine := int((y + float64(TheState.ScrollOffset)) / lineHeight)
|
|
|
|
// Group glyphs by their Y-baseline
|
|
type lineGroup struct {
|
|
y float64
|
|
indices []int
|
|
}
|
|
groups := []lineGroup{}
|
|
seenY := make(map[float64]int) // maps Y to group index
|
|
|
|
for i, yVal := range layout.Y {
|
|
yFloat := float64(yVal)
|
|
idx, ok := seenY[yFloat]
|
|
if !ok {
|
|
idx = len(groups)
|
|
groups = append(groups, lineGroup{y: yFloat, indices: []int{}})
|
|
seenY[yFloat] = idx
|
|
}
|
|
groups[idx].indices = append(groups[idx].indices, i)
|
|
}
|
|
// Sort groups by Y
|
|
sort.Slice(groups, func(i, j int) bool { return groups[i].y < groups[j].y })
|
|
|
|
// If visualLine is out of bounds, clamp
|
|
if visualLine < 0 {
|
|
visualLine = 0
|
|
}
|
|
if visualLine >= len(groups) {
|
|
visualLine = len(groups) - 1
|
|
}
|
|
|
|
targetGroup := groups[visualLine]
|
|
|
|
// 3. Identify rightmost extent on this line
|
|
rightmostX := 0.0
|
|
rightmostIdx := -1
|
|
for _, i := range targetGroup.indices {
|
|
xEnd := float64(layout.X[i] + layout.Advance[i])
|
|
if xEnd > rightmostX {
|
|
rightmostX = xEnd
|
|
rightmostIdx = i
|
|
}
|
|
}
|
|
|
|
// 4. Check if tap is to the right of the last character
|
|
if rightmostIdx != -1 && x > rightmostX {
|
|
// Position at the end of the line content, before any trailing newline.
|
|
start := layout.ByteOffsets[rightmostIdx]
|
|
r, size := utf8.DecodeRuneInString(TheState.Editor.Buffer[start:])
|
|
if r == '\n' {
|
|
TheState.Editor.CursorPosition = start
|
|
} else {
|
|
TheState.Editor.CursorPosition = start + size
|
|
}
|
|
return
|
|
}
|
|
|
|
// 5. Otherwise, find the closest glyph on this line.
|
|
bestIdx := -1
|
|
minDist := float64(1e9)
|
|
for _, i := range targetGroup.indices {
|
|
if bestIdx == -1 {
|
|
bestIdx = i
|
|
}
|
|
// Calculate distance to the glyph center
|
|
glyphCenterX := float64(layout.X[i] + layout.Advance[i]/2)
|
|
dist := glyphCenterX - x
|
|
if dist < 0 {
|
|
dist = -dist
|
|
}
|
|
if dist < minDist {
|
|
minDist = dist
|
|
bestIdx = i
|
|
}
|
|
}
|
|
if bestIdx != -1 {
|
|
TheState.Editor.CursorPosition = layout.ByteOffsets[bestIdx]
|
|
}
|
|
}
|