141 lines
3.2 KiB
Go
141 lines
3.2 KiB
Go
/*
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* Copyright (c) 2013-2021 Utkan Güngördü <utkan@freeconsole.org>
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* Copyright (c) 2021-2024 Piotr Grabowski
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gomicsv
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import (
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"fmt"
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"log"
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"sort"
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"strings"
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"time"
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"github.com/fauu/gomicsv/pagecache"
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"github.com/fauu/gomicsv/util"
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"github.com/gotk3/gotk3/glib"
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)
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const (
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pageCacheTrimInterval = 3 * time.Minute
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preloadedPageKeepAtLeastFor = 7 * time.Minute
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)
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func (app *App) setPage(n int) {
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if !app.archiveIsLoaded() {
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return
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}
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if n < 0 {
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n = 0
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}
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if app.S.Archive.Len() != nil && n >= *app.S.Archive.Len() {
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n = *app.S.Archive.Len() - 1
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}
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if n == app.S.ArchivePos {
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return
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}
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isPrev := false
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if n == app.S.ArchivePos-1 || (app.Config.DoublePage && n == app.S.ArchivePos-2) {
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isPrev = true
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}
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app.doSetPage(n)
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var scrollFunc func()
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if isPrev {
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scrollFunc = app.scrollToEnd
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} else {
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scrollFunc = app.scrollToStart
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}
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glib.TimeoutAdd(0, scrollFunc)
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}
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func (app *App) doSetPage(n int) {
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if !app.archiveIsLoaded() {
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return
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}
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app.jumpmarksHandleSetPage(n - 1)
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var err error
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app.S.PixbufL, err = app.S.Archive.Load(n, app.Config.EmbeddedOrientation, app.Config.NPreload)
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if err != nil {
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return
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}
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app.S.ArchivePos = n
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app.S.PixbufR = nil
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if app.Config.DoublePage && (app.S.Archive.Len() == nil || *app.S.Archive.Len() > n+1) {
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app.S.PixbufR, err = app.S.Archive.Load(n+1, app.Config.EmbeddedOrientation, app.Config.NPreload)
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if err != nil {
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app.showError(err.Error())
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return
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}
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}
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util.GC()
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app.blit()
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app.updateStatus()
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}
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func (app *App) trimPageCache() {
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if app.S.PageCache == nil {
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return
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}
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// Mark pages as no longer needed for preload unless they're recently fetched or near the current page
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var preloadDontKeep []int
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nearKeepStart := app.S.ArchivePos - app.Config.NPreload
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nearKeepEnd := app.S.ArchivePos + app.Config.NPreload
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for i, entry := range app.S.PageCache.Pages {
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if time.Since(entry.Time) > preloadedPageKeepAtLeastFor && (i < nearKeepStart || i > nearKeepEnd) {
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preloadDontKeep = append(preloadDontKeep, i)
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}
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}
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if len(preloadDontKeep) > 0 {
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app.S.PageCache.DontKeepSlice(preloadDontKeep, pagecache.KeepReasonPreload)
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}
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// Trim unneeded pages
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app.S.PageCache.Trim()
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// Log cache status
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var indices []int
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for i := range app.S.PageCache.Pages {
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indices = append(indices, i+1)
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}
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sort.Ints(indices)
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var strIndices []string
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for _, index := range indices {
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strIndices = append(strIndices, fmt.Sprint(index))
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}
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var remainingStr string
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if len(strIndices) == 0 {
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remainingStr = "-"
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} else {
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remainingStr = strings.Join(strIndices, ", ")
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}
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log.Printf("Trimmed page cache. Remaining pages: %s", remainingStr)
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}
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