81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
package browser
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import (
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"path/filepath"
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"strings"
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"pad/internal/ui"
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)
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// HandleScroll updates the browser scroll index by the given delta (in entries).
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// Clamps to valid bounds and triggers prefetch/eviction as needed.
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func HandleScroll(s *BrowserState, delta int) {
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deltaPx := int(float64(delta) * s.EntryHeight)
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HandlePixelScroll(s, deltaPx)
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}
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// HandlePixelScroll updates the browser scroll offset by the given delta (in pixels).
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// Clamps to valid bounds and triggers eviction as needed.
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func HandlePixelScroll(s *BrowserState, delta int) {
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s.ScrollOffset += float64(delta)
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// Clamp to valid bounds
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clampScrollOffset(s)
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// Trigger eviction of distant pages
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s.EvictPages()
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}
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// clampScrollOffset ensures the scroll offset stays within valid bounds.
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func clampScrollOffset(s *BrowserState) {
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if s.ScrollOffset < 0 {
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s.ScrollOffset = 0
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}
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// Use search results count if active, otherwise use TotalEntries
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entryCount := s.TotalEntries
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if s.Query != "" {
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entryCount = len(s.SearchResults)
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}
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// Calculate maximum scroll offset
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maxScroll := 0.0
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if entryCount > s.VisibleCount {
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maxScroll = float64(entryCount-s.VisibleCount) * s.EntryHeight
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}
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if s.ScrollOffset > maxScroll {
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s.ScrollOffset = maxScroll
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}
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}
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// HandleBrowserTap processes a tap on the ListView at the given index.
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func HandleBrowserTap(bm *BrowserManager, s *BrowserState, index int) {
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if index < 0 || index >= s.TotalEntries {
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return
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}
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entry, ok := getEntryByIndex(s, index)
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if !ok {
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return // Page not loaded
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}
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if entry.IsDir {
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// Navigate into directory or up
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var newPath string
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if entry.Name == ".." {
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newPath = filepath.Dir(s.CurrentPath)
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} else {
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newPath = filepath.Join(s.CurrentPath, entry.Name)
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if !strings.HasPrefix(newPath, "/") {
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newPath = "/" + newPath
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}
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}
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bm.NavigateTo(newPath)
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} else {
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// Open file
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s.SelectedIndex = index
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ui.OpenFile(entry.Path)
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}
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}
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