book-reader/app/src/main/java/com/aryan/reader/epubreader/EpubReaderControls.kt
Aryan 6a60aec0ef
Epub improvements (#160)
* Improved navigation and search result highlighting in the EPUB reader

* refactor: implement JIT chunk restoration for robust navigation

- Fixes search and bookmark navigation failing in same-chapter transitions.
- Introduced JIT (Just-in-Time) HTML restoration in `epub_reader.js` to
  re-populate virtualized chunks before CFI resolution or search scrolling.
- Synchronized search highlighting and user highlights within
  newly-restored chunk segments.
- Improved search navigation accuracy by mapping occurrences to
  relative chunk indices.

* Implemented a custom text selection engine for the paginated EPUB reader to support cross-page selection and improved handle interaction.

* Implemented management of external file behavior and improved library filtering.

* Added support for toolbar customization in the EPUB reader.

* Added support for toolbar customization in the PDF reader.

* fix: rendering during auto-scroll and navigation on long pages

* Added a "Scroll to Top" feature to the auto-scroll controls in both EPUB and PDF readers.
2026-04-10 17:30:48 +05:30

1424 lines
No EOL
70 KiB
Kotlin

/*
* Episteme Reader - A native Android document reader.
* Copyright (C) 2026 Episteme
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* mail: epistemereader@gmail.com
*/
// EpubReaderControls.kt
package com.aryan.reader.epubreader
import android.annotation.SuppressLint
import android.graphics.Bitmap
import android.graphics.Canvas
import android.os.Build
import timber.log.Timber
import android.webkit.WebView
import androidx.annotation.RequiresApi
import androidx.compose.animation.AnimatedContent
import androidx.compose.animation.AnimatedVisibility
import androidx.compose.animation.animateContentSize
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material.icons.filled.Settings
import androidx.compose.material3.Switch
import androidx.compose.material3.ModalBottomSheet
import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.animation.slideInVertically
import androidx.compose.animation.slideOutVertically
import androidx.compose.animation.togetherWith
import androidx.compose.foundation.BorderStroke
import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.WindowInsetsSides
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.only
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.statusBars
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.layout.widthIn
import androidx.compose.foundation.layout.windowInsetsPadding
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.automirrored.filled.ArrowBack
import androidx.compose.material.icons.filled.Add
import androidx.compose.material.icons.filled.ArrowDropDown
import androidx.compose.material.icons.filled.ArrowUpward
import androidx.compose.material.icons.filled.Check
import androidx.compose.material.icons.filled.ChevronLeft
import androidx.compose.material.icons.filled.ChevronRight
import androidx.compose.material.icons.filled.Close
import androidx.compose.material.icons.filled.Delete
import androidx.compose.material.icons.filled.GraphicEq
import androidx.compose.material.icons.filled.Menu
import androidx.compose.material.icons.filled.MoreVert
import androidx.compose.material.icons.filled.Pause
import androidx.compose.material.icons.filled.PlayArrow
import androidx.compose.material.icons.filled.Remove
import androidx.compose.material.icons.filled.Search
import androidx.compose.material.icons.filled.SwapHoriz
import androidx.compose.material.icons.filled.Visibility
import androidx.compose.material3.CircularProgressIndicator
import androidx.compose.material3.DropdownMenu
import androidx.compose.material3.DropdownMenuItem
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.FilledIconButton
import androidx.compose.material3.HorizontalDivider
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.IconButtonDefaults
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Slider
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.rotate
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.core.graphics.createBitmap
import androidx.media3.common.util.UnstableApi
import com.aryan.reader.BuildConfig
import com.aryan.reader.R
import com.aryan.reader.RenderMode
import com.aryan.reader.SearchState
import com.aryan.reader.SearchTopBar
import com.aryan.reader.TooltipIconButton
import com.aryan.reader.epub.EpubChapter
import com.aryan.reader.paginatedreader.BookPaginator
import com.aryan.reader.paginatedreader.IPaginator
import com.aryan.reader.tts.TtsPlaybackManager.TtsState
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
import kotlin.math.roundToInt
enum class ReaderTool(val title: String, val category: String) {
DICTIONARY("External Apps", "Top Bar"),
THEME("Theme Settings", "Top Bar"),
SLIDER("Navigation Slider", "Bottom Bar"),
TOC("Sidebar", "Bottom Bar"),
FORMAT("Text Formatting", "Bottom Bar"),
SEARCH("Search", "Bottom Bar"),
AI_FEATURES("AI Features", "Bottom Bar"),
TTS_CONTROLS("TTS Controls", "Bottom Bar"),
READING_MODE("Reading Mode", "Overflow Menu"),
BOOKMARK("Bookmark", "Overflow Menu"),
TAP_TO_TURN("Tap to Turn Pages", "Overflow Menu"),
VOLUME_SCROLL("Volume Button Scrolling", "Overflow Menu"),
PAGE_TURN_ANIM("Realistic Page Turns", "Overflow Menu"),
KEEP_SCREEN_ON("Keep Screen On", "Overflow Menu"),
VISUAL_OPTIONS("Visual Options", "Overflow Menu"),
AUTO_SCROLL("Auto Scroll", "Overflow Menu"),
TTS_SETTINGS("TTS Voice Settings", "Overflow Menu")
}
@Composable
fun EpubReaderTopBar(
isVisible: Boolean,
searchState: SearchState,
bookTitle: String,
currentRenderMode: RenderMode,
isBookmarked: Boolean,
isTtsActive: Boolean,
tapToNavigateEnabled: Boolean,
volumeScrollEnabled: Boolean,
isPageTurnAnimationEnabled: Boolean,
onNavigateBack: () -> Unit,
isKeepScreenOn: Boolean,
onToggleKeepScreenOn: (Boolean) -> Unit,
onCloseSearch: () -> Unit,
onChangeRenderMode: (RenderMode) -> Unit,
onToggleBookmark: () -> Unit,
onToggleTapToNavigate: (Boolean) -> Unit,
onToggleVolumeScroll: (Boolean) -> Unit,
onTogglePageTurnAnimation: (Boolean) -> Unit,
onStartAutoScroll: () -> Unit,
onOpenTtsSettings: () -> Unit,
onOpenDeviceVoiceSettings: () -> Unit,
onOpenDictionarySettings: () -> Unit,
onOpenThemeSettings: () -> Unit,
onOpenVisualOptions: () -> Unit,
searchFocusRequester: androidx.compose.ui.focus.FocusRequester,
hiddenTools: Set<String>,
onCustomizeTools: () -> Unit,
modifier: Modifier = Modifier,
onToggleReflow: (() -> Unit)? = null,
onDeleteReflow: (() -> Unit)? = null,
) {
AnimatedVisibility(
visible = isVisible,
enter = slideInVertically(animationSpec = tween(200)) { -it } + fadeIn(animationSpec = tween(200)),
exit = slideOutVertically(animationSpec = tween(200)) { -it } + fadeOut(animationSpec = tween(200)),
modifier = modifier
) {
Surface(
modifier = Modifier
.fillMaxWidth()
.height(55.dp),
color = MaterialTheme.colorScheme.surface,
tonalElevation = 4.dp
) {
Row(
modifier = Modifier
.fillMaxSize()
.windowInsetsPadding(WindowInsets.navigationBars.only(WindowInsetsSides.Horizontal))
.padding(horizontal = 4.dp),
verticalAlignment = Alignment.CenterVertically
) {
if (searchState.isSearchActive) {
SearchTopBar(
searchState = searchState,
focusRequester = searchFocusRequester,
onCloseSearch = onCloseSearch
)
} else {
TooltipIconButton(
text = stringResource(R.string.tooltip_back),
description = stringResource(R.string.tooltip_back_desc),
onClick = onNavigateBack
) {
Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Back")
}
Spacer(Modifier.width(8.dp))
Text(
text = bookTitle.take(40) + if (bookTitle.length > 40) "..." else "",
style = MaterialTheme.typography.titleMedium,
maxLines = 1,
overflow = TextOverflow.Ellipsis,
modifier = Modifier.weight(1f)
)
if (!hiddenTools.contains(ReaderTool.DICTIONARY.name)) {
TooltipIconButton(
text = stringResource(R.string.tooltip_dictionary),
description = stringResource(R.string.tooltip_dictionary_desc),
onClick = onOpenDictionarySettings
) {
Icon(
painter = painterResource(id = R.drawable.dictionary),
contentDescription = stringResource(R.string.content_desc_dictionary_settings)
)
}
}
if (!hiddenTools.contains(ReaderTool.THEME.name)) {
TooltipIconButton(
text = stringResource(R.string.tooltip_theme),
description = stringResource(R.string.tooltip_theme_desc),
onClick = onOpenThemeSettings
) {
Icon(painter = painterResource(id = R.drawable.palette), contentDescription = stringResource(R.string.tooltip_theme_desc))
}
}
Box {
var showMoreMenu by remember { mutableStateOf(false) }
TooltipIconButton(
text = stringResource(R.string.tooltip_more_options),
description = stringResource(R.string.tooltip_more_options_desc),
onClick = { showMoreMenu = true }
) {
Icon(Icons.Default.MoreVert, contentDescription = stringResource(R.string.content_desc_more_options))
}
DropdownMenu(
expanded = showMoreMenu,
onDismissRequest = { showMoreMenu = false }
) {
DropdownMenuItem(
text = { Text("Customize Toolbar") },
onClick = {
showMoreMenu = false
onCustomizeTools()
},
leadingIcon = {
Icon(Icons.Default.Settings, contentDescription = null, modifier = Modifier.size(20.dp))
}
)
HorizontalDivider()
if (onToggleReflow != null) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_view_original_pdf)) },
onClick = {
showMoreMenu = false
onToggleReflow()
},
leadingIcon = {
Icon(
painter = painterResource(id = R.drawable.picture_as_pdf),
contentDescription = null,
modifier = Modifier.size(20.dp)
)
}
)
HorizontalDivider()
}
onDeleteReflow?.let {
HorizontalDivider()
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_delete_text_view)) },
onClick = {
showMoreMenu = false
it()
},
leadingIcon = {
Icon(
imageVector = Icons.Default.Delete,
contentDescription = null,
tint = MaterialTheme.colorScheme.error
)
},
colors = androidx.compose.material3.MenuDefaults.itemColors(
textColor = MaterialTheme.colorScheme.error
)
)
}
if (!hiddenTools.contains(ReaderTool.READING_MODE.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_reading_mode_vertical)) },
enabled = !isTtsActive,
onClick = {
showMoreMenu = false
onChangeRenderMode(RenderMode.VERTICAL_SCROLL)
},
trailingIcon = {
if (currentRenderMode == RenderMode.VERTICAL_SCROLL) Icon(
Icons.Default.Check,
contentDescription = stringResource(R.string.content_desc_selected)
)
})
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_reading_mode_paginated)) },
enabled = !isTtsActive,
onClick = {
showMoreMenu = false
onChangeRenderMode(RenderMode.PAGINATED)
},
trailingIcon = {
if (currentRenderMode == RenderMode.PAGINATED) Icon(
Icons.Default.Check,
contentDescription = stringResource(R.string.content_desc_selected)
)
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.BOOKMARK.name)) {
DropdownMenuItem(text = {
Text(
if (isBookmarked) stringResource(R.string.menu_remove_bookmark) else stringResource(
R.string.menu_bookmark_this_page
)
)
}, onClick = {
showMoreMenu = false
onToggleBookmark()
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.TAP_TO_TURN.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_tap_to_turn_pages)) },
enabled = currentRenderMode == RenderMode.PAGINATED,
onClick = {
onToggleTapToNavigate(!tapToNavigateEnabled)
showMoreMenu = false
},
trailingIcon = {
if (tapToNavigateEnabled) Icon(
Icons.Default.Check,
contentDescription = stringResource(R.string.content_desc_enabled)
)
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.VOLUME_SCROLL.name)) {
DropdownMenuItem(
text = {
Text(
if (currentRenderMode == RenderMode.VERTICAL_SCROLL) stringResource(
R.string.menu_volume_button_scrolling
)
else stringResource(R.string.menu_volume_button_page_turn)
)
},
enabled = true,
onClick = {
onToggleVolumeScroll(!volumeScrollEnabled)
showMoreMenu = false
},
trailingIcon = {
if (volumeScrollEnabled) Icon(
Icons.Default.Check,
contentDescription = stringResource(R.string.content_desc_enabled)
)
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.PAGE_TURN_ANIM.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_realistic_page_turns)) },
enabled = currentRenderMode == RenderMode.PAGINATED,
onClick = {
onTogglePageTurnAnimation(!isPageTurnAnimationEnabled)
showMoreMenu = false
},
trailingIcon = {
if (isPageTurnAnimationEnabled) Icon(
Icons.Default.Check,
contentDescription = stringResource(R.string.content_desc_enabled)
)
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.KEEP_SCREEN_ON.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_keep_screen_on)) },
onClick = {
onToggleKeepScreenOn(!isKeepScreenOn)
showMoreMenu = false
},
trailingIcon = {
if (isKeepScreenOn) Icon(
Icons.Default.Check,
contentDescription = stringResource(R.string.content_desc_enabled)
)
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.VISUAL_OPTIONS.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_visual_options)) },
onClick = {
showMoreMenu = false
onOpenVisualOptions()
},
leadingIcon = {
Icon(
Icons.Default.Visibility,
contentDescription = null,
modifier = Modifier.size(20.dp)
)
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.AUTO_SCROLL.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_auto_scroll)) },
enabled = !isTtsActive && currentRenderMode == RenderMode.VERTICAL_SCROLL,
onClick = {
showMoreMenu = false
onStartAutoScroll()
})
HorizontalDivider()
}
if (!hiddenTools.contains(ReaderTool.TTS_SETTINGS.name)) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_tts_voice_settings)) },
onClick = {
showMoreMenu = false
onOpenDeviceVoiceSettings()
},
leadingIcon = {
Icon(
Icons.Default.GraphicEq,
contentDescription = null,
modifier = Modifier.size(20.dp)
)
})
if (BuildConfig.DEBUG) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_tts_settings_debug)) },
onClick = {
showMoreMenu = false
onOpenTtsSettings()
},
leadingIcon = {
Icon(
painter = painterResource(id = R.drawable.text_to_speech),
contentDescription = null,
modifier = Modifier.size(20.dp)
)
}
)
}
}
}
}
}
}
}
}
}
@androidx.annotation.OptIn(UnstableApi::class)
@Composable
fun EpubReaderBottomBar(
isVisible: Boolean,
currentRenderMode: RenderMode,
isTtsSessionActive: Boolean,
ttsState: TtsState,
isProUser: Boolean,
onOpenSlider: () -> Unit,
onOpenDrawer: () -> Unit,
onToggleFormat: () -> Unit,
onToggleSearch: () -> Unit,
onSummarize: () -> Unit,
onRecap: () -> Unit,
onToggleTts: () -> Unit,
onPlayPauseTts: () -> Unit,
hiddenTools: Set<String>,
modifier: Modifier = Modifier
) {
AnimatedVisibility(
visible = isVisible,
enter = slideInVertically(animationSpec = tween(200)) { it } + fadeIn(animationSpec = tween(200)),
exit = slideOutVertically(animationSpec = tween(200)) { it } + fadeOut(animationSpec = tween(200)),
modifier = modifier
) {
Surface(
modifier = Modifier.fillMaxWidth().height(45.dp),
color = MaterialTheme.colorScheme.surface,
tonalElevation = 4.dp
) {
Row(
modifier = Modifier
.fillMaxSize()
.windowInsetsPadding(WindowInsets.navigationBars.only(WindowInsetsSides.Horizontal))
.padding(horizontal = 4.dp),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceAround
) {
if (!hiddenTools.contains(ReaderTool.SLIDER.name)) {
TooltipIconButton(
text = stringResource(R.string.tooltip_slider),
description = stringResource(R.string.tooltip_slider_desc),
onClick = onOpenSlider,
enabled = currentRenderMode != RenderMode.VERTICAL_SCROLL
) {
Icon(
painter = painterResource(id = R.drawable.slider),
contentDescription = stringResource(R.string.content_desc_navigate_slider)
)
}
}
if (!hiddenTools.contains(ReaderTool.TOC.name)) {
TooltipIconButton(
text = stringResource(R.string.tooltip_toc),
description = stringResource(R.string.tooltip_toc_desc),
onClick = onOpenDrawer
) {
Icon(
imageVector = Icons.Default.Menu,
contentDescription = stringResource(R.string.content_desc_chapters_menu)
)
}
}
if (!hiddenTools.contains(ReaderTool.FORMAT.name)) {
TooltipIconButton(
text = stringResource(R.string.tooltip_format),
description = stringResource(R.string.tooltip_format_desc),
onClick = onToggleFormat
) {
Icon(
painter = painterResource(id = R.drawable.format_size),
contentDescription = stringResource(R.string.content_desc_text_formatting)
)
}
}
if (!hiddenTools.contains(ReaderTool.SEARCH.name)) {
TooltipIconButton(
text = stringResource(R.string.tooltip_search),
description = stringResource(R.string.tooltip_search_desc),
onClick = onToggleSearch
) {
Icon(
imageVector = Icons.Default.Search,
contentDescription = stringResource(R.string.tooltip_search)
)
}
}
if (!hiddenTools.contains(ReaderTool.AI_FEATURES.name)) {
@Suppress(
"KotlinConstantConditions",
"SimplifyBooleanWithConstants"
) if (BuildConfig.FLAVOR != "oss") {
Box {
var showAiFeaturesMenu by remember { mutableStateOf(false) }
TooltipIconButton(
text = stringResource(R.string.tooltip_ai),
description = stringResource(R.string.tooltip_ai_desc),
onClick = { showAiFeaturesMenu = true }) {
Icon(
painter = painterResource(id = R.drawable.ai),
contentDescription = "AI Features"
)
}
DropdownMenu(
expanded = showAiFeaturesMenu,
onDismissRequest = { showAiFeaturesMenu = false }) {
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_chapter_summarization)) },
onClick = {
showAiFeaturesMenu = false
onSummarize()
})
if (BuildConfig.DEBUG && isProUser) {
HorizontalDivider()
DropdownMenuItem(
text = { Text(stringResource(R.string.menu_recap_beta)) },
onClick = {
showAiFeaturesMenu = false
onRecap()
})
}
}
}
}
}
if (!hiddenTools.contains(ReaderTool.TTS_CONTROLS.name)) {
Box {
Row(verticalAlignment = Alignment.CenterVertically) {
TooltipIconButton(
text = if (isTtsSessionActive) stringResource(R.string.tooltip_tts_stop)
else stringResource(R.string.tooltip_tts_start),
description = if (isTtsSessionActive) stringResource(R.string.tooltip_tts_stop_desc)
else stringResource(R.string.tooltip_tts_start_desc),
onClick = onToggleTts
) {
Icon(
painter = if (isTtsSessionActive) painterResource(id = R.drawable.close) else painterResource(
id = R.drawable.text_to_speech
),
contentDescription = if (isTtsSessionActive) stringResource(R.string.content_desc_stop_tts) else stringResource(
R.string.content_desc_start_tts
)
)
}
if (isTtsSessionActive) {
TooltipIconButton(
text = if (ttsState.isPlaying) stringResource(R.string.tooltip_tts_pause)
else stringResource(R.string.tooltip_tts_resume),
description = if (ttsState.isPlaying) stringResource(R.string.tooltip_tts_pause_desc)
else stringResource(R.string.tooltip_tts_resume_desc),
onClick = onPlayPauseTts,
enabled = !ttsState.isLoading
) {
Icon(
painter = painterResource(id = if (ttsState.isPlaying) R.drawable.pause else R.drawable.play),
contentDescription = if (ttsState.isPlaying) stringResource(
R.string.content_desc_pause_tts
) else stringResource(R.string.content_desc_resume_tts)
)
}
}
}
}
}
}
}
}
}
@RequiresApi(Build.VERSION_CODES.VANILLA_ICE_CREAM)
@SuppressLint("UnusedBoxWithConstraintsScope")
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun EpubReaderPageSlider(
isVisible: Boolean,
currentRenderMode: RenderMode,
totalPages: Int,
sliderCurrentPage: Float,
sliderStartPage: Int,
startPageThumbnail: Bitmap?,
paginator: IPaginator?,
chapters: List<EpubChapter>,
onClose: () -> Unit,
onScrub: (Float) -> Unit,
onJumpToPage: (Int) -> Unit
) {
AnimatedVisibility(
visible = isVisible,
enter = slideInVertically(animationSpec = tween(200)) { fullHeight -> fullHeight } + fadeIn(animationSpec = tween(200)),
exit = slideOutVertically(animationSpec = tween(200)) { fullHeight -> fullHeight } + fadeOut(animationSpec = tween(200))
) {
Box(modifier = Modifier.fillMaxSize()) {
Box(
modifier = Modifier
.fillMaxSize()
.clickable(
interactionSource = remember { MutableInteractionSource() },
indication = null
) { onClose() }
)
IconButton(
onClick = onClose,
modifier = Modifier
.align(Alignment.TopStart)
.windowInsetsPadding(WindowInsets.statusBars.only(WindowInsetsSides.Top + WindowInsetsSides.Start))
.padding(8.dp)
) {
Icon(
imageVector = Icons.AutoMirrored.Filled.ArrowBack,
contentDescription = stringResource(R.string.content_desc_exit_slider)
)
}
// Bottom controls
Box(
modifier = Modifier
.fillMaxWidth()
.align(Alignment.BottomCenter)
.padding(bottom = WindowInsets.navigationBars.asPaddingValues().calculateBottomPadding() + 16.dp)
.clickable(indication = null, interactionSource = remember { MutableInteractionSource() }) {},
) {
Row(
modifier = Modifier
.fillMaxWidth()
.padding(horizontal = 32.dp, vertical = 16.dp),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.spacedBy(16.dp)
) {
BoxWithConstraints(
modifier = Modifier.weight(1f),
contentAlignment = Alignment.Center
) {
Slider(
value = sliderCurrentPage,
onValueChange = onScrub,
valueRange = 1f..(totalPages.toFloat().coerceAtLeast(1f)),
steps = if (totalPages > 2) totalPages - 2 else 0,
modifier = Modifier.fillMaxWidth(),
thumb = {
Surface(
modifier = Modifier.size(20.dp),
shape = CircleShape,
color = MaterialTheme.colorScheme.primary,
tonalElevation = 0.dp,
shadowElevation = 0.dp
) {}
},
track = { sliderState ->
val trackHeight = 2.dp
val trackShape = RoundedCornerShape(trackHeight)
val range = sliderState.valueRange.endInclusive - sliderState.valueRange.start
val fraction = if (range == 0f) 0f else {
((sliderState.value - sliderState.valueRange.start) / range).coerceIn(0f, 1f)
}
Box(
modifier = Modifier
.fillMaxWidth()
.height(trackHeight)
.background(
color = MaterialTheme.colorScheme.primary.copy(alpha = 0.3f),
shape = trackShape
)
) {
Box(
modifier = Modifier
.fillMaxWidth(fraction)
.fillMaxHeight()
.background(
color = MaterialTheme.colorScheme.primary,
shape = trackShape
)
)
}
}
)
// Thumbnail Indicator
val startPageOffsetFraction = if (totalPages > 1) {
(sliderStartPage - 1).toFloat() / (totalPages - 1)
} else {
0f
}
val thumbWidth = 20.dp
val trackWidth = maxWidth - thumbWidth
val startPagePixelPosition = (trackWidth * startPageOffsetFraction) + (thumbWidth / 2)
val thumbnailModifier = Modifier
.graphicsLayer { clip = false }
.align(Alignment.TopStart)
.offset(
x = startPagePixelPosition - (45.dp / 2),
y = (-72).dp
)
if (currentRenderMode == RenderMode.VERTICAL_SCROLL) {
startPageThumbnail?.let { thumbnail ->
ThumbnailWithIndicator(
modifier = thumbnailModifier,
onClick = { onJumpToPage(sliderStartPage) }
) {
Image(
bitmap = thumbnail.asImageBitmap(),
contentDescription = stringResource(R.string.content_desc_start_page_thumbnail),
contentScale = ContentScale.FillBounds,
modifier = Modifier.fillMaxSize()
)
}
}
} else {
val startPageChapterIndex = remember(sliderStartPage, paginator) {
(paginator as? BookPaginator)?.findChapterIndexForPage(sliderStartPage - 1)
}
val startPageChapterTitle = remember(startPageChapterIndex) {
startPageChapterIndex?.let { chapters.getOrNull(it)?.title }
}
ThumbnailWithIndicator(
modifier = thumbnailModifier,
onClick = { onJumpToPage(sliderStartPage) }
) {
PaginatedThumbnailContent(
pageNumber = sliderStartPage,
chapterTitle = startPageChapterTitle
)
}
}
}
Text(
text = "${sliderCurrentPage.roundToInt()} / $totalPages",
style = MaterialTheme.typography.bodyLarge,
color = MaterialTheme.colorScheme.onSurface,
fontSize = 18.sp
)
}
}
}
}
}
// --- Helpers moved from Screen ---
@Composable
fun PageScrubbingAnimation(currentPage: Int, totalPages: Int) {
Box(
modifier = Modifier
.fillMaxSize()
.clickable(indication = null, interactionSource = remember { MutableInteractionSource() }) {},
contentAlignment = Alignment.Center
) {
Column(
horizontalAlignment = Alignment.CenterHorizontally,
modifier = Modifier
.background(
color = MaterialTheme.colorScheme.surface.copy(alpha = 0.9f),
shape = RoundedCornerShape(16.dp)
)
.padding(horizontal = 24.dp, vertical = 16.dp)
) {
Icon(
painter = painterResource(id = R.drawable.slider),
contentDescription = null,
modifier = Modifier.size(48.dp),
tint = MaterialTheme.colorScheme.primary
)
Spacer(Modifier.height(12.dp))
Text(
text = "Page $currentPage of $totalPages",
style = MaterialTheme.typography.headlineSmall,
color = MaterialTheme.colorScheme.onSurface
)
}
}
}
@Composable
internal fun ThumbnailWithIndicator(modifier: Modifier = Modifier, onClick: () -> Unit, content: @Composable () -> Unit) {
val borderColor = MaterialTheme.colorScheme.primary
Column(
modifier = modifier,
horizontalAlignment = Alignment.CenterHorizontally
) {
Surface(
modifier = Modifier
.width(45.dp)
.height(64.dp)
.clickable(onClick = onClick),
shape = RoundedCornerShape(4.dp),
border = BorderStroke(2.dp, borderColor)
) {
content()
}
Box(
modifier = Modifier
.offset(y = (-4).dp)
.size(8.dp)
.rotate(45f)
.background(borderColor)
)
}
}
@Composable
private fun PaginatedThumbnailContent(pageNumber: Int, chapterTitle: String?) {
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colorScheme.surfaceVariant,
contentColor = MaterialTheme.colorScheme.onSurfaceVariant
) {
Column(
modifier = Modifier.padding(4.dp),
verticalArrangement = Arrangement.Center,
horizontalAlignment = Alignment.CenterHorizontally
) {
if (chapterTitle != null) {
Text(
text = chapterTitle,
style = MaterialTheme.typography.labelSmall,
maxLines = 3,
overflow = TextOverflow.Ellipsis,
textAlign = TextAlign.Center,
lineHeight = 10.sp
)
Spacer(modifier = Modifier.height(4.dp))
}
Text(
text = "$pageNumber",
style = MaterialTheme.typography.bodyLarge,
fontWeight = FontWeight.Bold
)
}
}
}
suspend fun captureWebViewVisibleArea(webView: WebView): Bitmap? {
return withContext(Dispatchers.Main) {
if (webView.width <= 0 || webView.height <= 0) return@withContext null
try {
val thumbnailWidth = 180
val thumbnailHeight = 256
val bitmap = createBitmap(thumbnailWidth, thumbnailHeight)
val canvas = Canvas(bitmap)
val scale = thumbnailWidth.toFloat() / webView.width.toFloat()
canvas.scale(scale, scale)
canvas.translate(-webView.scrollX.toFloat(), -webView.scrollY.toFloat())
webView.draw(canvas)
bitmap
} catch (e: Exception) {
Timber.e(e, "Failed to capture webview content")
null
}
}
}
@Composable
fun SpeedDropdown(
label: String,
currentValue: Float,
options: List<Float>,
onValueChange: (Float) -> Unit
) {
var expanded by remember { mutableStateOf(false) }
Box {
Text(
text = "$label: ${currentValue}x",
style = MaterialTheme.typography.labelSmall,
color = MaterialTheme.colorScheme.primary,
modifier = Modifier
.clickable { expanded = true }
.padding(4.dp)
)
DropdownMenu(expanded = expanded, onDismissRequest = { expanded = false }) {
options.forEach { opt ->
DropdownMenuItem(
text = { Text("${opt}x") },
onClick = {
onValueChange(opt)
expanded = false
}
)
}
}
}
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun AutoScrollControls(
isPlaying: Boolean,
onPlayPauseToggle: () -> Unit,
speed: Float,
minSpeed: Float,
maxSpeed: Float,
onSpeedChange: (Float) -> Unit,
onMinSpeedChange: (Float) -> Unit,
onMaxSpeedChange: (Float) -> Unit,
onClose: () -> Unit,
isCollapsed: Boolean,
onCollapseChange: (Boolean) -> Unit,
isMusicianMode: Boolean,
onMusicianModeToggle: () -> Unit,
useSlider: Boolean,
onInputModeToggle: () -> Unit,
isLocalMode: Boolean,
onLocalModeToggle: (Boolean) -> Unit,
modifier: Modifier = Modifier,
isTempPaused: Boolean = false,
onScrollToTop: (() -> Unit)? = null
) {
val backgroundAlpha = 0.6f
Surface(
shape = RoundedCornerShape(28.dp),
color = MaterialTheme.colorScheme.surfaceContainerHigh.copy(alpha = backgroundAlpha),
tonalElevation = 0.dp,
shadowElevation = 0.dp,
border = BorderStroke(1.dp, MaterialTheme.colorScheme.outlineVariant.copy(alpha = 0.8f)),
modifier = modifier
.widthIn(max = 400.dp)
.animateContentSize()
) {
AnimatedContent(
targetState = isCollapsed,
transitionSpec = {
fadeIn(tween(200)) togetherWith fadeOut(tween(200))
},
label = "AutoScrollUnified"
) { collapsed ->
if (collapsed) {
Row(
modifier = Modifier
.padding(horizontal = 6.dp, vertical = 6.dp),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.spacedBy(4.dp)
) {
IconButton(
onClick = { onCollapseChange(false) },
modifier = Modifier.size(36.dp)
) {
Icon(
imageVector = Icons.Default.ChevronLeft,
contentDescription = stringResource(R.string.content_desc_expand),
tint = MaterialTheme.colorScheme.onSurfaceVariant
)
}
Box(modifier = Modifier.size(36.dp), contentAlignment = Alignment.Center) {
FilledIconButton(
onClick = onPlayPauseToggle,
modifier = Modifier.size(36.dp),
colors = IconButtonDefaults.filledIconButtonColors(
containerColor = MaterialTheme.colorScheme.primary,
contentColor = MaterialTheme.colorScheme.onPrimary
)
) {
Icon(
imageVector = if (isPlaying) Icons.Default.Pause else Icons.Default.PlayArrow,
contentDescription = if (isPlaying) stringResource(R.string.content_desc_pause_playback) else stringResource(R.string.content_desc_start_playback),
modifier = Modifier.size(20.dp)
)
}
if (isTempPaused && isPlaying) {
CircularProgressIndicator(
modifier = Modifier.size(36.dp),
color = MaterialTheme.colorScheme.onPrimary.copy(alpha = 0.5f),
strokeWidth = 2.dp
)
}
}
}
} else {
Column(
modifier = Modifier.padding(16.dp)
) {
// Top Row: Label & Tools
Row(
modifier = Modifier.fillMaxWidth(),
horizontalArrangement = Arrangement.SpaceBetween,
verticalAlignment = Alignment.CenterVertically
) {
Box {
var showModeMenu by remember { mutableStateOf(false) }
Row(
verticalAlignment = Alignment.CenterVertically,
modifier = Modifier
.clip(RoundedCornerShape(8.dp))
.clickable { showModeMenu = true }
.padding(4.dp)
) {
Text(
text = if (isLocalMode) stringResource(R.string.auto_scroll_local_speed) else stringResource(R.string.auto_scroll_global_speed),
style = MaterialTheme.typography.labelLarge,
color = MaterialTheme.colorScheme.primary
)
Icon(
imageVector = Icons.Default.ArrowDropDown,
contentDescription = stringResource(R.string.content_desc_select_mode),
tint = MaterialTheme.colorScheme.primary,
modifier = Modifier.size(20.dp)
)
}
DropdownMenu(
expanded = showModeMenu,
onDismissRequest = { showModeMenu = false }
) {
DropdownMenuItem(
text = {
Column {
Text(stringResource(R.string.auto_scroll_global_speed), style = MaterialTheme.typography.bodyMedium, fontWeight = FontWeight.Bold)
Text(stringResource(R.string.auto_scroll_applies_all_files), style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
}
},
onClick = {
onLocalModeToggle(false)
showModeMenu = false
},
trailingIcon = {
if (!isLocalMode) Icon(Icons.Default.Check, contentDescription = null)
}
)
HorizontalDivider()
DropdownMenuItem(
text = {
Column {
Text(stringResource(R.string.auto_scroll_local_speed), style = MaterialTheme.typography.bodyMedium, fontWeight = FontWeight.Bold)
Text(stringResource(R.string.auto_scroll_saved_for_file), style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
}
},
onClick = {
onLocalModeToggle(true)
showModeMenu = false
},
trailingIcon = {
if (isLocalMode) Icon(Icons.Default.Check, contentDescription = null)
}
)
}
}
Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
if (onScrollToTop != null) {
IconButton(
onClick = onScrollToTop,
modifier = Modifier.size(32.dp)
) {
Icon(
imageVector = Icons.Default.ArrowUpward,
contentDescription = "Scroll to Top",
modifier = Modifier.size(18.dp),
tint = MaterialTheme.colorScheme.onSurfaceVariant
)
}
}
IconButton(
onClick = onMusicianModeToggle,
modifier = Modifier.size(32.dp)
) {
Icon(
painter = painterResource(id = R.drawable.music_note),
contentDescription = if (isMusicianMode) stringResource(R.string.content_desc_disable_musician_mode) else stringResource(R.string.content_desc_enable_musician_mode),
modifier = Modifier.size(18.dp),
tint = if (isMusicianMode) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.onSurfaceVariant
)
}
IconButton(
onClick = onInputModeToggle,
modifier = Modifier.size(32.dp)
) {
Icon(
imageVector = Icons.Default.SwapHoriz,
contentDescription = stringResource(R.string.content_desc_swap_controls),
modifier = Modifier.size(18.dp),
tint = MaterialTheme.colorScheme.onSurfaceVariant
)
}
IconButton(
onClick = { onCollapseChange(true) },
modifier = Modifier.size(32.dp)
) {
Icon(
imageVector = Icons.Default.ChevronRight,
contentDescription = stringResource(R.string.content_desc_collapse),
modifier = Modifier.size(18.dp),
tint = MaterialTheme.colorScheme.onSurfaceVariant
)
}
IconButton(
onClick = onClose,
modifier = Modifier.size(32.dp)
) {
Icon(
imageVector = Icons.Default.Close,
contentDescription = stringResource(R.string.action_close),
tint = MaterialTheme.colorScheme.error,
modifier = Modifier.size(18.dp)
)
}
}
}
Spacer(Modifier.height(16.dp))
// Bottom Row: Controls
Row(
modifier = Modifier.fillMaxWidth(),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.spacedBy(16.dp)
) {
// Play/Pause
Box(modifier = Modifier.size(48.dp), contentAlignment = Alignment.Center) {
FilledIconButton(
onClick = onPlayPauseToggle,
modifier = Modifier.size(48.dp),
colors = IconButtonDefaults.filledIconButtonColors(
containerColor = MaterialTheme.colorScheme.primary,
contentColor = MaterialTheme.colorScheme.onPrimary
)
) {
Icon(
imageVector = if (isPlaying) Icons.Default.Pause else Icons.Default.PlayArrow,
contentDescription = if (isPlaying) stringResource(R.string.tooltip_tts_pause) else stringResource(R.string.content_desc_start_playback),
modifier = Modifier.size(24.dp)
)
}
if (isTempPaused && isPlaying) {
CircularProgressIndicator(
modifier = Modifier.size(48.dp),
color = MaterialTheme.colorScheme.onPrimary.copy(alpha = 0.5f),
strokeWidth = 3.dp
)
}
}
// Speed Controls
Box(
modifier = Modifier.weight(1f),
contentAlignment = Alignment.Center
) {
Column(horizontalAlignment = Alignment.CenterHorizontally) {
val speedOptions = listOf(0.1f, 0.5f, 1f, 1.5f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 9f, 10f)
Row(
modifier = Modifier.fillMaxWidth().padding(horizontal = 8.dp),
horizontalArrangement = Arrangement.SpaceBetween
) {
SpeedDropdown(
label = stringResource(R.string.label_min),
currentValue = minSpeed,
options = speedOptions,
onValueChange = onMinSpeedChange
)
SpeedDropdown(
label = stringResource(R.string.label_max),
currentValue = maxSpeed,
options = speedOptions,
onValueChange = onMaxSpeedChange
)
}
Spacer(Modifier.height(4.dp))
val safeMax = maxSpeed.coerceAtLeast(minSpeed + 0.1f)
if (useSlider) {
Row(
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.spacedBy(12.dp)
) {
Text(
text = "%.1fx".format(speed),
style = MaterialTheme.typography.titleMedium.copy(fontFeatureSettings = "tnum"),
modifier = Modifier.width(45.dp),
textAlign = TextAlign.End
)
val steps = ((safeMax - minSpeed) / 0.1f).roundToInt() - 1
Slider(
value = speed,
onValueChange = { onSpeedChange((it * 10f).roundToInt() / 10f) },
valueRange = minSpeed..safeMax,
steps = if (steps > 0) steps else 0,
modifier = Modifier.weight(1f),
thumb = {
Box(
modifier = Modifier
.size(20.dp)
.background(MaterialTheme.colorScheme.primary, CircleShape)
)
},
track = { sliderState ->
val fraction = (sliderState.value - sliderState.valueRange.start) /
(sliderState.valueRange.endInclusive - sliderState.valueRange.start)
Box(
modifier = Modifier
.fillMaxWidth()
.height(4.dp)
.background(
MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.2f),
RoundedCornerShape(2.dp)
),
contentAlignment = Alignment.CenterStart
) {
Box(
modifier = Modifier
.fillMaxWidth(fraction)
.height(4.dp)
.background(
MaterialTheme.colorScheme.primary,
RoundedCornerShape(2.dp)
)
)
}
}
)
}
} else {
Surface(
shape = RoundedCornerShape(50),
color = MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f),
modifier = Modifier.height(48.dp).fillMaxWidth()
) {
Row(
modifier = Modifier.fillMaxSize(),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween
) {
IconButton(
onClick = { onSpeedChange((speed - 0.1f).coerceAtLeast(minSpeed)) },
modifier = Modifier.size(48.dp)
) {
Icon(Icons.Default.Remove, stringResource(R.string.content_desc_slower))
}
Text(
text = "%.1fx".format(speed),
style = MaterialTheme.typography.titleMedium.copy(fontFeatureSettings = "tnum"),
textAlign = TextAlign.Center
)
IconButton(
onClick = { onSpeedChange((speed + 0.1f).coerceAtMost(safeMax)) },
modifier = Modifier.size(48.dp)
) {
Icon(Icons.Default.Add, stringResource(R.string.content_desc_faster))
}
}
}
}
}
}
}
}
}
}
}
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun CustomizeToolsSheet(
hiddenTools: Set<String>,
onUpdate: (Set<String>) -> Unit,
onDismiss: () -> Unit
) {
ModalBottomSheet(
onDismissRequest = onDismiss,
contentWindowInsets = { WindowInsets.navigationBars }
) {
Column(modifier = Modifier.padding(horizontal = 24.dp).padding(bottom = 24.dp)) {
Text(
text = "Customize Toolbar",
style = MaterialTheme.typography.headlineSmall,
fontWeight = FontWeight.Bold,
color = MaterialTheme.colorScheme.onSurface
)
Spacer(modifier = Modifier.height(8.dp))
Text(
text = "Select the tools you want to keep visible. Unchecking a tool hides it from the UI to give you a distraction-free reading space.",
style = MaterialTheme.typography.bodyMedium,
color = MaterialTheme.colorScheme.onSurfaceVariant
)
Spacer(modifier = Modifier.height(16.dp))
LazyColumn(modifier = Modifier.fillMaxWidth()) {
ReaderTool.entries.groupBy { it.category }.forEach { (category, tools) ->
item {
Text(
text = category,
style = MaterialTheme.typography.labelMedium,
color = MaterialTheme.colorScheme.primary,
modifier = Modifier.padding(top = 16.dp, bottom = 8.dp)
)
}
items(tools) { tool ->
Row(
modifier = Modifier
.fillMaxWidth()
.clip(RoundedCornerShape(8.dp))
.clickable {
val newSet = hiddenTools.toMutableSet()
if (newSet.contains(tool.name)) newSet.remove(tool.name)
else newSet.add(tool.name)
onUpdate(newSet)
}
.padding(vertical = 12.dp, horizontal = 8.dp),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween
) {
Text(
text = tool.title,
style = MaterialTheme.typography.bodyLarge,
color = MaterialTheme.colorScheme.onSurface
)
Switch(
checked = !hiddenTools.contains(tool.name),
onCheckedChange = { isVisible ->
val newSet = hiddenTools.toMutableSet()
if (isVisible) newSet.remove(tool.name) else newSet.add(tool.name)
onUpdate(newSet)
}
)
}
}
}
}
}
}
}