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Epub improvements (#162)

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* Added a "Remove Edge Padding" option in "Visual Options"

* Added support for paragraph gap settings in the EPUB vertical reader.

* Added support for adjustable paragraph gaps in the paginated reader.

* fix(epub-pagination): ensure custom fonts override embedded epub fonts

* feat(epub): allow overlapping highlights and resolve gesture selection conflicts
This commit is contained in:
Aryan 2026-04-10 17:43:01 +05:30 • committed by GitHub
parent 291504fd90
commit 49e08cc9f1
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GPG key ID: B5690EEEBB952194
11 changed files with 315 additions and 264 deletions
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42
app/src/main/assets/epub_reader.js
View file

@ -381,6 +381,10 @@
};
function handleHighlightInteraction(e) {
if (window.getSelection && window.getSelection().toString().trim().length > 0) {
return false;
}
var target = e.target;
var highlightSpan = null;
@ -426,7 +430,6 @@
if (rawCfi && rawCfi.includes(";;")) {
var cfiParts = rawCfi.split(";;");
cfiToReport = cfiParts[cfiParts.length - 1];
console.log("HandleInteraction: Multi-CFI detected on single span. Reporting top layer: " + cfiToReport);
}
if (window.HighlightBridge) {
@ -445,25 +448,10 @@
function (e) {
handleHighlightInteraction(e);
},
true,
true
);
// 2. Handle Long Press (Context Menu) - "Atomic" Behavior
// This prevents the native Android selection handles from appearing inside the highlight
document.addEventListener(
"contextmenu",
function (e) {
if (handleHighlightInteraction(e)) {
e.preventDefault(); // Ensure menu doesn't show
return false;
}
},
true,
);
window.updateReaderStyles = function (fontSizeEm, lineHeight, fontFamily, textAlign) {
window.updateReaderStyles = function (fontSizeEm, lineHeight, fontFamily, textAlign, paragraphGap) {
var logTag = "ReaderFontDiagnosis";
console.log(
logTag +
@ -475,7 +463,8 @@
fontFamily +
"', Align: '" +
textAlign +
"'",
"', Gap: " +
paragraphGap
);
var dynamicStyleId = "dynamicReaderStyles";
@ -489,9 +478,11 @@
var newFontSize = parseFloat(fontSizeEm);
var newLineHeight = parseFloat(lineHeight);
var newGap = parseFloat(paragraphGap);
if (isNaN(newFontSize) || newFontSize < 0.5 || newFontSize > 5.0) newFontSize = 1.0;
if (isNaN(newLineHeight) || newLineHeight < 1.0 || newLineHeight > 3.0) newLineHeight = 1.6;
if (isNaN(newGap) || newGap < 0.0 || newGap > 3.0) newGap = 1.0;
var fontCss = "";
var selector = "body";
@ -535,6 +526,17 @@
`;
}
// --- GAP LOGIC ---
var gapCss = `
body p, body ul, body ol, body blockquote {
margin-top: ` + (0.5 * newGap) + `em !important;
margin-bottom: ` + (0.5 * newGap) + `em !important;
}
body li {
margin-bottom: ` + (0.25 * newGap) + `em !important;
}
`;
dynamicStyleElement.innerHTML =
` body {
font-size: ` +
@ -555,7 +557,7 @@
` +
alignCss +
` `;
gapCss;
setTimeout(
function () {

6
app/src/main/java/com/aryan/reader/epubreader/ChapterWebView.kt
View file

@ -321,6 +321,7 @@ fun ChapterWebView(
onTopChunkUpdated: (Int) -> Unit,
currentFontSize: Float,
currentLineHeight: Float,
currentParagraphGap: Float,
onChapterInitiallyScrolled: () -> Unit,
modifier: Modifier = Modifier,
onTap: () -> Unit,
@ -456,6 +457,7 @@ fun ChapterWebView(
key,
currentFontSize,
currentLineHeight,
currentParagraphGap,
currentFontFamily,
currentTextAlign
) {
@ -714,7 +716,7 @@ fun ChapterWebView(
}
view?.evaluateJavascript(
"javascript:window.updateReaderStyles($currentFontSize, $currentLineHeight, '$fontNameForJs', '${currentTextAlign.cssValue}');",
"javascript:window.updateReaderStyles($currentFontSize, $currentLineHeight, '$fontNameForJs', '${currentTextAlign.cssValue}', $currentParagraphGap);",
null
)
@ -829,7 +831,7 @@ fun ChapterWebView(
)
webView.evaluateJavascript(
"javascript:window.updateReaderStyles($currentFontSize, $currentLineHeight, '$fontNameForJs', '${currentTextAlign.cssValue}');",
"javascript:window.updateReaderStyles($currentFontSize, $currentLineHeight, '$fontNameForJs', '${currentTextAlign.cssValue}', $currentParagraphGap);",
null
)

88
app/src/main/java/com/aryan/reader/epubreader/EpubReaderAnnotations.kt
View file

@ -287,76 +287,28 @@ fun processAndAddHighlight(
chapterIndex: Int,
currentList: MutableList<UserHighlight>
): String {
val newParts = newCfi.split('|')
val newStartFull = newParts.first()
val newEndFull = newParts.last()
val newStartPath = newStartFull.split(':').first()
val newStartOffset = newStartFull.substringAfter(':', "0").toInt()
val newEndPath = newEndFull.split(':').first()
val newEndOffset = newEndFull.substringAfter(':', "0").toInt()
val iterator = currentList.iterator()
var finalStartPath = newStartPath
var finalStartOffset = newStartOffset
var finalEndPath = newEndPath
var finalEndOffset = newEndOffset
var finalText = newText
var finalNote: String? = null
while (iterator.hasNext()) {
val existing = iterator.next()
if (existing.chapterIndex != chapterIndex) continue
val exParts = existing.cfi.split('|')
val exStartFull = exParts.first()
val exEndFull = exParts.last()
val exStartPath = exStartFull.split(':').first()
val exStartOffset = exStartFull.substringAfter(':', "0").toInt()
val exEndPath = exEndFull.split(':').first()
val exEndOffset = exEndFull.substringAfter(':', "0").toInt()
fun comparePaths(p1: String, p2: String): Int {
val parts1 = p1.split('/').filter { it.isNotEmpty() }.mapNotNull { it.toIntOrNull() }
val parts2 = p2.split('/').filter { it.isNotEmpty() }.mapNotNull { it.toIntOrNull() }
val len = min(parts1.size, parts2.size)
for (i in 0 until len) {
if (parts1[i] != parts2[i]) return parts1[i] - parts2[i]
}
return parts1.size - parts2.size
}
val startCmp = comparePaths(exStartPath, newEndPath)
val endCmp = comparePaths(exEndPath, newStartPath)
val isDisjoint = (startCmp > 0) || (startCmp == 0 && exStartOffset > newEndOffset) ||
(endCmp < 0) || (endCmp == 0 && exEndOffset < newStartOffset)
if (!isDisjoint) {
iterator.remove()
if (existing.note != null && finalNote == null) finalNote = existing.note
val unionStartCmp = comparePaths(finalStartPath, exStartPath)
if (unionStartCmp > 0 || (unionStartCmp == 0 && finalStartOffset > exStartOffset)) {
finalStartPath = exStartPath
finalStartOffset = exStartOffset
}
val unionEndCmp = comparePaths(finalEndPath, exEndPath)
if (unionEndCmp < 0 || (unionEndCmp == 0 && finalEndOffset < exEndOffset)) {
finalEndPath = exEndPath
finalEndOffset = exEndOffset
}
if (existing.text.length > finalText.length) finalText = existing.text
}
// Scenario: Exact match -> Update color and text instead of stacking identical spans
val exactMatchIndex = currentList.indexOfFirst {
it.chapterIndex == chapterIndex && it.cfi == newCfi
}
val finalCfi = "$finalStartPath:$finalStartOffset|$finalEndPath:$finalEndOffset"
currentList.add(UserHighlight(
cfi = finalCfi,
text = finalText,
color = newColor,
chapterIndex = chapterIndex,
note = finalNote
))
return finalCfi
if (exactMatchIndex != -1) {
val existing = currentList[exactMatchIndex]
currentList[exactMatchIndex] = existing.copy(color = newColor, text = newText)
return existing.cfi
}
// Scenarios: Partial overlap or subsumption -> Add independently
currentList.add(
UserHighlight(
cfi = newCfi,
text = newText,
color = newColor,
chapterIndex = chapterIndex,
note = null
)
)
return newCfi
}
// --- UI Components ---

23
app/src/main/java/com/aryan/reader/epubreader/EpubReaderScreen.kt
View file

@ -502,6 +502,7 @@ fun EpubReaderHost(
var pageInfoMode by remember { mutableStateOf(loadPageInfoMode(context)) }
var pullToTurnEnabled by remember { mutableStateOf(loadPullToTurn(context)) }
var showVisualOptionsSheet by remember { mutableStateOf(false) }
var removeEdgePadding by remember { mutableStateOf(loadRemoveEdgePadding(context)) }
var volumeScrollEnabled by remember {
mutableStateOf(loadVolumeScrollSetting(context))
@ -899,6 +900,7 @@ fun EpubReaderHost(
var currentFontSizeEm by remember(initialFormatSettings) { mutableFloatStateOf(initialFormatSettings.fontSize) }
var currentLineHeight by remember(initialFormatSettings) { mutableFloatStateOf(initialFormatSettings.lineHeight) }
var currentParagraphGap by remember(initialFormatSettings) { mutableFloatStateOf(initialFormatSettings.paragraphGap) }
var currentTextAlign by remember(initialFormatSettings) { mutableStateOf(initialFormatSettings.textAlign) }
var currentFontFamily by remember(initialFormatSettings) { mutableStateOf(initialFormatSettings.font) }
var currentCustomFontPath by remember(initialFormatSettings) { mutableStateOf(initialFormatSettings.customPath) }
@ -914,14 +916,14 @@ fun EpubReaderHost(
var showFontSelectionSheet by remember { mutableStateOf(false) }
val fontSheetState = rememberModalBottomSheetState()
LaunchedEffect(currentFontSizeEm, currentLineHeight, currentFontFamily, currentCustomFontPath, currentTextAlign, isFormatLocal) {
LaunchedEffect(currentFontSizeEm, currentLineHeight, currentParagraphGap, currentFontFamily, currentCustomFontPath, currentTextAlign, isFormatLocal) {
if (isFormatLocal) {
saveLocalReaderSettings(
context, bookId, currentFontSizeEm, currentLineHeight, currentFontFamily, currentCustomFontPath, currentTextAlign
context, bookId, currentFontSizeEm, currentLineHeight, currentParagraphGap, currentFontFamily, currentCustomFontPath, currentTextAlign
)
} else {
saveReaderSettings(
context, currentFontSizeEm, currentLineHeight, currentFontFamily, currentCustomFontPath, currentTextAlign
context, currentFontSizeEm, currentLineHeight, currentParagraphGap, currentFontFamily, currentCustomFontPath, currentTextAlign
)
}
}
@ -2144,11 +2146,13 @@ fun EpubReaderHost(
if (pageInfoMode == PageInfoMode.DEFAULT) PAGE_INFO_BAR_HEIGHT else 0.dp
}
val horizontalPadding = if (removeEdgePadding) 0.dp else 16.dp
Box(
modifier = Modifier
.fillMaxSize()
.padding(bottom = contentBottomPadding)
.padding(top = 16.dp, start = 16.dp, end = 16.dp)
.padding(top = 16.dp, start = horizontalPadding, end = horizontalPadding)
.testTag("ReaderContainer")
) {
if (chapters.isEmpty()) {
@ -2521,6 +2525,7 @@ fun EpubReaderHost(
modifier = Modifier.fillMaxSize(),
currentFontSize = currentFontSizeEm,
currentLineHeight = currentLineHeight,
currentParagraphGap = currentParagraphGap,
currentFontFamily = currentFontFamily,
customFontPath = currentCustomFontPath,
currentTextAlign = currentTextAlign,
@ -2870,6 +2875,7 @@ fun EpubReaderHost(
searchQuery = searchState.searchQuery,
fontSizeMultiplier = currentFontSizeEm,
lineHeightMultiplier = currentLineHeight,
paragraphGapMultiplier = currentParagraphGap,
fontFamily = activeFontFamily,
textAlign = currentTextAlign,
activeHighlightPalette = currentHighlightPalette,
@ -2881,6 +2887,7 @@ fun EpubReaderHost(
offset = ttsState.startOffsetInSource
).takeIf { ttsState.currentText != null && ttsState.sourceCfi != null && ttsState.startOffsetInSource != -1 },
activeTextureId = activeTextureId,
removeEdgePadding = removeEdgePadding,
initialChapterIndexInBook = lastKnownLocator?.chapterIndex,
modifier = Modifier.alpha(if (isPagerInitialized) 1f else 0f),
onPaginatorReady = { newPaginator ->
@ -3877,6 +3884,8 @@ fun EpubReaderHost(
onFontSizeChange = { currentFontSizeEm = it },
currentLineHeight = currentLineHeight,
onLineHeightChange = { currentLineHeight = it },
currentParagraphGap = currentParagraphGap,
onParagraphGapChange = { currentParagraphGap = it },
currentFont = currentFontFamily,
currentCustomFontName = if(currentCustomFontPath != null) {
customFonts.find { it.path == currentCustomFontPath }?.displayName ?: "Custom Font"
@ -3892,6 +3901,7 @@ fun EpubReaderHost(
onReset = {
currentFontSizeEm = DEFAULT_FONT_SIZE_VAL
currentLineHeight = DEFAULT_LINE_HEIGHT_VAL
currentParagraphGap = DEFAULT_PARAGRAPH_GAP_VAL
currentFontFamily = ReaderFont.ORIGINAL
currentCustomFontPath = null
currentTextAlign = ReaderTextAlign.DEFAULT
@ -4229,6 +4239,11 @@ fun EpubReaderHost(
pullToTurnEnabled = it
savePullToTurn(context, it)
},
removeEdgePadding = removeEdgePadding,
onRemoveEdgePaddingChange = {
removeEdgePadding = it
saveRemoveEdgePadding(context, it)
},
onDismiss = { showVisualOptionsSheet = false }
)
}

226
app/src/main/java/com/aryan/reader/epubreader/EpubReaderSettings.kt
View file

@ -97,12 +97,14 @@ import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.rememberModalBottomSheetState
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.res.stringResource
const val SETTINGS_PREFS_NAME = "epub_reader_settings"
private const val TEXT_ALIGN_KEY = "reader_text_align"
private const val FONT_SIZE_KEY = "reader_font_size"
private const val LINE_HEIGHT_KEY = "reader_line_height"
private const val PARAGRAPH_GAP_KEY = "reader_paragraph_gap"
private const val AUTO_SCROLL_SPEED_KEY = "reader_auto_scroll_speed"
private const val FONT_FAMILY_KEY = "reader_font_family"
private const val TAP_TO_NAVIGATE_ENABLED_KEY = "tap_to_navigate_enabled"
@ -113,6 +115,7 @@ private const val PULL_TO_TURN_ENABLED_KEY = "reader_pull_to_turn_enabled"
const val DEFAULT_FONT_SIZE_VAL = 1.0f
const val DEFAULT_LINE_HEIGHT_VAL = 1.6f
const val DEFAULT_PARAGRAPH_GAP_VAL = 1.0f
enum class ReaderFont(val id: String, val displayName: String, val fontFamilyName: String) {
ORIGINAL("original", "Original", "Original"),
@ -144,6 +147,7 @@ enum class PageInfoMode(val id: Int, val title: String) {
data class FormatSettings(
val fontSize: Float,
val lineHeight: Float,
val paragraphGap: Float,
val font: ReaderFont,
val customPath: String?,
val textAlign: ReaderTextAlign
@ -152,6 +156,7 @@ data class FormatSettings(
private const val FORMAT_IS_LOCAL_PREFIX = "format_is_local_"
private const val LOCAL_FONT_SIZE_PREFIX = "local_font_size_"
private const val LOCAL_LINE_HEIGHT_PREFIX = "local_line_height_"
private const val LOCAL_PARAGRAPH_GAP_PREFIX = "local_paragraph_gap_"
private const val LOCAL_FONT_FAMILY_PREFIX = "local_font_family_"
private const val LOCAL_TEXT_ALIGN_PREFIX = "local_text_align_"
@ -170,6 +175,7 @@ fun saveLocalReaderSettings(
bookId: String,
fontSize: Float,
lineHeight: Float,
paragraphGap: Float,
fontFamily: ReaderFont,
customFontPath: String?,
textAlign: ReaderTextAlign
@ -178,6 +184,7 @@ fun saveLocalReaderSettings(
prefs.edit {
putFloat(LOCAL_FONT_SIZE_PREFIX + bookId, fontSize)
putFloat(LOCAL_LINE_HEIGHT_PREFIX + bookId, lineHeight)
putFloat(LOCAL_PARAGRAPH_GAP_PREFIX + bookId, paragraphGap)
if (customFontPath != null) {
putString(LOCAL_FONT_FAMILY_PREFIX + bookId, "custom|$customFontPath")
} else {
@ -234,6 +241,12 @@ fun loadFormatSettings(context: Context, bookId: String, isLocal: Boolean): Form
prefs.getFloat(LINE_HEIGHT_KEY, DEFAULT_LINE_HEIGHT_VAL)
}
val paragraphGap = if (isLocal && prefs.contains(LOCAL_PARAGRAPH_GAP_PREFIX + bookId)) {
prefs.getFloat(LOCAL_PARAGRAPH_GAP_PREFIX + bookId, DEFAULT_PARAGRAPH_GAP_VAL)
} else {
prefs.getFloat(PARAGRAPH_GAP_KEY, DEFAULT_PARAGRAPH_GAP_VAL)
}
val savedFontVal = if (isLocal && prefs.contains(LOCAL_FONT_FAMILY_PREFIX + bookId)) {
prefs.getString(LOCAL_FONT_FAMILY_PREFIX + bookId, ReaderFont.ORIGINAL.id) ?: ReaderFont.ORIGINAL.id
} else {
@ -253,7 +266,7 @@ fun loadFormatSettings(context: Context, bookId: String, isLocal: Boolean): Form
}
val textAlign = ReaderTextAlign.entries.find { it.id == alignId } ?: ReaderTextAlign.DEFAULT
return FormatSettings(fontSize, lineHeight, font, customPath, textAlign)
return FormatSettings(fontSize, lineHeight, paragraphGap, font, customPath, textAlign)
}
fun getComposeFontFamily(
@ -291,6 +304,7 @@ fun saveReaderSettings(
context: Context,
fontSize: Float,
lineHeight: Float,
paragraphGap: Float,
fontFamily: ReaderFont,
customFontPath: String?,
textAlign: ReaderTextAlign
@ -299,6 +313,7 @@ fun saveReaderSettings(
prefs.edit {
putFloat(FONT_SIZE_KEY, fontSize)
putFloat(LINE_HEIGHT_KEY, lineHeight)
putFloat(PARAGRAPH_GAP_KEY, paragraphGap)
if (customFontPath != null) {
putString(FONT_FAMILY_KEY, "custom|$customFontPath")
} else {
@ -345,6 +360,8 @@ fun ReaderTextFormatPanel(
onFontSizeChange: (Float) -> Unit,
currentLineHeight: Float,
onLineHeightChange: (Float) -> Unit,
currentParagraphGap: Float, // NEW
onParagraphGapChange: (Float) -> Unit, // NEW
currentFont: ReaderFont,
currentCustomFontName: String?,
onFontOptionClick: () -> Unit,
@ -363,10 +380,10 @@ fun ReaderTextFormatPanel(
modifier = modifier
) {
Surface(
shape = RoundedCornerShape(28.dp),
color = MaterialTheme.colorScheme.surfaceContainerHigh.copy(alpha = 0.95f),
shape = RoundedCornerShape(topStart = 28.dp, topEnd = 28.dp),
color = MaterialTheme.colorScheme.surfaceContainerHigh.copy(alpha = 0.98f),
tonalElevation = 0.dp,
shadowElevation = 0.dp,
shadowElevation = 8.dp,
border = BorderStroke(1.dp, MaterialTheme.colorScheme.outlineVariant.copy(alpha = 0.8f)),
modifier = Modifier
.fillMaxWidth()
@ -375,6 +392,7 @@ fun ReaderTextFormatPanel(
Column(
modifier = Modifier.padding(16.dp)
) {
// Header Row (Local/Global + Close/Reset)
Row(
modifier = Modifier.fillMaxWidth(),
horizontalArrangement = Arrangement.SpaceBetween,
@ -439,82 +457,109 @@ fun ReaderTextFormatPanel(
Spacer(Modifier.height(16.dp))
Row(
modifier = Modifier.fillMaxWidth(),
horizontalArrangement = Arrangement.spacedBy(16.dp),
verticalAlignment = Alignment.CenterVertically
// FONT & ALIGNMENT SECTION
Text(
text = "FONT & ALIGNMENT",
style = MaterialTheme.typography.labelSmall,
color = MaterialTheme.colorScheme.primary,
fontWeight = FontWeight.Bold,
modifier = Modifier.padding(start = 4.dp, bottom = 8.dp)
)
// Font Button (Full width)
Surface(
onClick = onFontOptionClick,
shape = RoundedCornerShape(12.dp),
color = MaterialTheme.colorScheme.secondaryContainer,
modifier = Modifier
.fillMaxWidth()
.height(52.dp)
) {
Surface(
onClick = onFontOptionClick,
shape = RoundedCornerShape(12.dp),
color = MaterialTheme.colorScheme.secondaryContainer,
modifier = Modifier
.weight(0.45f)
.height(48.dp)
Row(
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween,
modifier = Modifier.padding(horizontal = 16.dp)
) {
Row(
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween,
modifier = Modifier.padding(horizontal = 12.dp)
) {
Row(verticalAlignment = Alignment.CenterVertically) {
Text(
text = "Aa",
style = MaterialTheme.typography.titleMedium,
fontWeight = FontWeight.Bold,
color = MaterialTheme.colorScheme.onSecondaryContainer,
modifier = Modifier.padding(end = 12.dp)
)
Text(
text = currentCustomFontName ?: currentFont.displayName,
style = MaterialTheme.typography.labelLarge,
style = MaterialTheme.typography.titleSmall,
color = MaterialTheme.colorScheme.onSecondaryContainer,
maxLines = 1, overflow = TextOverflow.Ellipsis
)
Icon(
imageVector = Icons.AutoMirrored.Filled.KeyboardArrowRight,
contentDescription = null,
tint = MaterialTheme.colorScheme.onSecondaryContainer,
modifier = Modifier.size(16.dp)
)
}
Icon(
imageVector = Icons.AutoMirrored.Filled.KeyboardArrowRight,
contentDescription = null,
tint = MaterialTheme.colorScheme.onSecondaryContainer,
modifier = Modifier.size(20.dp)
)
}
}
Surface(
shape = RoundedCornerShape(12.dp),
color = MaterialTheme.colorScheme.surfaceVariant,
modifier = Modifier
.weight(0.55f)
.height(48.dp)
) {
Row {
ReaderTextAlign.entries.forEach { align ->
val isSelected = currentTextAlign == align
Column(
modifier = Modifier
.fillMaxHeight()
.weight(1f)
.background(if (isSelected) MaterialTheme.colorScheme.primary else Color.Transparent)
.clickable { onTextAlignChange(align) },
horizontalAlignment = Alignment.CenterHorizontally,
verticalArrangement = Arrangement.Center
) {
Icon(
painter = androidx.compose.ui.res.painterResource(id = align.iconResId),
contentDescription = align.displayName,
tint = if (isSelected) MaterialTheme.colorScheme.onPrimary else MaterialTheme.colorScheme.onSurfaceVariant,
modifier = Modifier.size(18.dp)
)
Text(
text = align.displayName,
style = MaterialTheme.typography.labelSmall,
fontSize = 10.sp,
color = if (isSelected) MaterialTheme.colorScheme.onPrimary else MaterialTheme.colorScheme.onSurfaceVariant
)
}
Spacer(Modifier.height(8.dp))
// Alignment Button (Full width Segmented)
Surface(
shape = RoundedCornerShape(12.dp),
color = MaterialTheme.colorScheme.surfaceVariant,
modifier = Modifier
.fillMaxWidth()
.height(48.dp)
) {
Row {
ReaderTextAlign.entries.forEach { align ->
val isSelected = currentTextAlign == align
Column(
modifier = Modifier
.fillMaxHeight()
.weight(1f)
.clip(RoundedCornerShape(12.dp))
.background(if (isSelected) MaterialTheme.colorScheme.primary else Color.Transparent)
.clickable { onTextAlignChange(align) },
horizontalAlignment = Alignment.CenterHorizontally,
verticalArrangement = Arrangement.Center
) {
Icon(
painter = painterResource(id = align.iconResId),
contentDescription = align.displayName,
tint = if (isSelected) MaterialTheme.colorScheme.onPrimary else MaterialTheme.colorScheme.onSurfaceVariant,
modifier = Modifier.size(20.dp)
)
Text(
text = align.displayName,
style = MaterialTheme.typography.labelSmall,
fontSize = 11.sp,
color = if (isSelected) MaterialTheme.colorScheme.onPrimary else MaterialTheme.colorScheme.onSurfaceVariant
)
}
}
}
}
Spacer(Modifier.height(16.dp))
Spacer(Modifier.height(24.dp))
// LAYOUT & SPACING SECTION
Text(
text = "LAYOUT & SPACING",
style = MaterialTheme.typography.labelSmall,
color = MaterialTheme.colorScheme.primary,
fontWeight = FontWeight.Bold,
modifier = Modifier.padding(start = 4.dp, bottom = 8.dp)
)
// Sliders
Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
// Size
Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(12.dp)) {
Text("Size", style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(55.dp))
Text("Size", style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(60.dp))
Slider(
value = currentFontSize,
onValueChange = onFontSizeChange,
@ -522,10 +567,11 @@ fun ReaderTextFormatPanel(
steps = 24,
modifier = Modifier.weight(1f)
)
Text("%.1fx".format(currentFontSize), style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(35.dp), textAlign = TextAlign.End)
Text("%.1fx".format(currentFontSize), style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(40.dp), textAlign = TextAlign.End)
}
// Lines
Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(12.dp)) {
Text("Spacing", style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(55.dp))
Text("Lines", style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(60.dp))
Slider(
value = currentLineHeight,
onValueChange = onLineHeightChange,
@ -533,9 +579,22 @@ fun ReaderTextFormatPanel(
steps = 14,
modifier = Modifier.weight(1f)
)
Text("%.1fx".format(currentLineHeight), style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(35.dp), textAlign = TextAlign.End)
Text("%.1fx".format(currentLineHeight), style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(40.dp), textAlign = TextAlign.End)
}
// Paragraph Gap
Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(12.dp)) {
Text("Gap", style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(60.dp))
Slider(
value = currentParagraphGap,
onValueChange = onParagraphGapChange,
valueRange = 0.0f..3.0f,
steps = 12,
modifier = Modifier.weight(1f)
)
Text("%.1fx".format(currentParagraphGap), style = MaterialTheme.typography.labelMedium, modifier = Modifier.width(40.dp), textAlign = TextAlign.End)
}
}
Spacer(Modifier.height(8.dp))
}
}
}
@ -647,6 +706,18 @@ fun FontSelectionSheetContent(
}
}
private const val REMOVE_EDGE_PADDING_KEY = "reader_remove_edge_padding"
fun saveRemoveEdgePadding(context: Context, enabled: Boolean) {
val prefs = context.getSharedPreferences(SETTINGS_PREFS_NAME, Context.MODE_PRIVATE)
prefs.edit { putBoolean(REMOVE_EDGE_PADDING_KEY, enabled) }
}
fun loadRemoveEdgePadding(context: Context): Boolean {
val prefs = context.getSharedPreferences(SETTINGS_PREFS_NAME, Context.MODE_PRIVATE)
return prefs.getBoolean(REMOVE_EDGE_PADDING_KEY, false)
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun VisualOptionsSheet(
@ -656,6 +727,8 @@ fun VisualOptionsSheet(
onPageInfoModeChange: (PageInfoMode) -> Unit,
pullToTurnEnabled: Boolean,
onPullToTurnChange: (Boolean) -> Unit,
removeEdgePadding: Boolean,
onRemoveEdgePaddingChange: (Boolean) -> Unit,
onDismiss: () -> Unit
) {
val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
@ -730,6 +803,29 @@ fun VisualOptionsSheet(
}
}
Spacer(modifier = Modifier.height(24.dp))
Surface(
shape = RoundedCornerShape(12.dp),
color = MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f),
modifier = Modifier
.fillMaxWidth()
.clickable { onRemoveEdgePaddingChange(!removeEdgePadding) }
) {
Row(
modifier = Modifier.padding(16.dp),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween
) {
Column(modifier = Modifier.weight(1f)) {
Text(stringResource(R.string.visual_options_edge_padding), style = MaterialTheme.typography.titleMedium)
Text(stringResource(R.string.visual_options_edge_padding_desc), style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
}
Spacer(modifier = Modifier.width(16.dp))
Switch(checked = removeEdgePadding, onCheckedChange = { onRemoveEdgePaddingChange(it) })
}
}
Spacer(modifier = Modifier.height(32.dp))
}
}

10
app/src/main/java/com/aryan/reader/paginatedreader/BookPaginator.kt
View file

@ -118,7 +118,8 @@ class BookPaginator(
private val allFontFaces: List<FontFaceInfo>,
private val context: Context,
private val mathMLRenderer: MathMLRenderer,
private val userTextAlign: TextAlign?
private val userTextAlign: TextAlign?,
private val paragraphGapMultiplier: Float
) : IPaginator {
override var totalPageCount by mutableIntStateOf(0)
private set
@ -271,7 +272,7 @@ class BookPaginator(
}
private fun generateConfigurationHash(): Int {
val configString = "w:${constraints.maxWidth}-h:${constraints.maxHeight}-fs:${textStyle.fontSize.value}-ta:$userTextAlign"
val configString = "w:${constraints.maxWidth}-h:${constraints.maxHeight}-fs:${textStyle.fontSize.value}-ta:$userTextAlign-pg:$paragraphGapMultiplier"
val hash = configString.hashCode()
return hash
}
@ -323,6 +324,8 @@ class BookPaginator(
)
bookCacheDao.insertConfigurationCache(newCache)
bookCacheDao.cleanupOldConfigurations(bookId)
if (finalizedChapterCounts.size >= chapters.size) {
pageCountsAreAccurate = true
}
@ -418,7 +421,8 @@ class BookPaginator(
themeTextColor = themeTextColor,
chapterAbsPath = chapter.absPath,
extractionBasePath = extractionBasePath,
userTextAlign = userTextAlign
userTextAlign = userTextAlign,
paragraphGapMultiplier = paragraphGapMultiplier
)
bookCacheDao.getProcessedChapter(bookId, chapterIndex)?.let { cachedChapter ->

46
app/src/main/java/com/aryan/reader/paginatedreader/ContentStyler.kt
View file

@ -54,7 +54,8 @@ class ContentStyler(
private val themeTextColor: Color,
private val chapterAbsPath: String,
private val extractionBasePath: String,
private val userTextAlign: TextAlign?
private val userTextAlign: TextAlign?,
private val paragraphGapMultiplier: Float
) {
fun style(semanticBlocks: List<SemanticBlock>): List<ContentBlock> {
@ -102,6 +103,18 @@ class ContentStyler(
private fun styleBlock(block: SemanticBlock): ContentBlock? {
val themedStyle = applyThemeToStyle(block.style)
val finalBlockStyle = if (block is SemanticParagraph) {
val originalMargin = themedStyle.blockStyle.margin
val newMargin = originalMargin.copy(
top = originalMargin.top * paragraphGapMultiplier,
bottom = originalMargin.bottom * paragraphGapMultiplier
)
themedStyle.blockStyle.copy(margin = newMargin)
} else {
themedStyle.blockStyle
}
return when (block) {
is SemanticParagraph -> {
val computedTextAlign = userTextAlign ?: themedStyle.paragraphStyle.textAlign
@ -109,7 +122,7 @@ class ContentStyler(
ParagraphBlock(
content = buildAnnotatedString(block, themedStyle),
textAlign = computedTextAlign,
style = themedStyle.blockStyle,
style = finalBlockStyle,
elementId = block.elementId,
cfi = block.cfi,
startCharOffsetInSource = block.startCharOffsetInSource,
@ -353,14 +366,20 @@ class ContentStyler(
textMotion = mergedParagraphStyle.textMotion
)
var initialSpanStyle = baseTextStyle.toSpanStyle()
.merge(blockStyle.spanStyle)
.copy(fontFamily = baseTextStyle.fontFamily)
val isCustomFont = baseTextStyle.fontFamily != null && baseTextStyle.fontFamily != FontFamily.Default
if (rootFontFamily == FontFamily.Monospace) {
initialSpanStyle = initialSpanStyle.copy(fontFamily = rootFontFamily)
val effectiveBlockFontFamily = if (rootFontFamily == FontFamily.Monospace) {
FontFamily.Monospace
} else if (isCustomFont) {
baseTextStyle.fontFamily
} else {
rootFontFamily ?: baseTextStyle.fontFamily
}
val initialSpanStyle = baseTextStyle.toSpanStyle()
.merge(blockStyle.spanStyle)
.copy(fontFamily = effectiveBlockFontFamily)
Timber.d("ContentStyler: InitialSpanStyle. BaseFontSize=${baseTextStyle.fontSize}, BlockFontSize=${blockStyle.spanStyle.fontSize} -> Merged=${initialSpanStyle.fontSize}")
withStyle(finalParagraphStyle) {
@ -368,14 +387,23 @@ class ContentStyler(
append(block.text)
block.spans.sortedBy { it.start }.forEach { span ->
val themedSpanStyle = applyThemeToStyle(span.style)
val fontFamily = findFirstAvailableFontFamily(themedSpanStyle.fontFamilies, fontFamilyMap)
val spanFontFamily = findFirstAvailableFontFamily(themedSpanStyle.fontFamilies, fontFamilyMap)
val effectiveSpanFontFamily = if (spanFontFamily == FontFamily.Monospace) {
FontFamily.Monospace
} else if (isCustomFont) {
baseTextStyle.fontFamily
} else {
spanFontFamily
}
val baselineShift = when (span.tag) {
"sub" -> BaselineShift.Subscript
"sup" -> BaselineShift.Superscript
else -> null
}
val finalSpanStyle = themedSpanStyle.spanStyle.copy(
fontFamily = fontFamily,
fontFamily = effectiveSpanFontFamily,
baselineShift = baselineShift
)
addStyle(initialSpanStyle.merge(finalSpanStyle), span.start, span.end)

120
app/src/main/java/com/aryan/reader/paginatedreader/PaginatedReader.kt
View file

@ -491,6 +491,7 @@ private fun WrappingContentLayout(
@OptIn(ExperimentalFoundationApi::class, ExperimentalSerializationApi::class, FlowPreview::class)
@Composable
fun PaginatedReaderScreen(
modifier: Modifier = Modifier,
book: EpubBook,
isDarkTheme: Boolean,
effectiveBg: Color,
@ -500,11 +501,12 @@ fun PaginatedReaderScreen(
searchQuery: String,
fontSizeMultiplier: Float,
lineHeightMultiplier: Float,
paragraphGapMultiplier: Float,
fontFamily: FontFamily,
textAlign: ReaderTextAlign,
ttsHighlightInfo: TtsHighlightInfo?,
initialChapterIndexInBook: Int?,
modifier: Modifier = Modifier,
removeEdgePadding: Boolean = false,
onPaginatorReady: (IPaginator) -> Unit,
onTap: (Offset?) -> Unit,
isProUser: Boolean,
@ -553,6 +555,7 @@ fun PaginatedReaderScreen(
var debouncedFontSizeMult by remember { mutableFloatStateOf(fontSizeMultiplier) }
var debouncedLineHeightMult by remember { mutableFloatStateOf(lineHeightMultiplier) }
var debouncedParagraphGapMult by remember { mutableFloatStateOf(paragraphGapMultiplier) }
var debouncedFontFamily by remember { mutableStateOf(fontFamily) }
var debouncedTextAlign by remember { mutableStateOf(textAlign) }
@ -611,8 +614,8 @@ fun PaginatedReaderScreen(
)
}
LaunchedEffect(fontSizeMultiplier, lineHeightMultiplier, fontFamily, textAlign) {
if (fontSizeMultiplier != debouncedFontSizeMult || lineHeightMultiplier != debouncedLineHeightMult || fontFamily != debouncedFontFamily || textAlign != debouncedTextAlign) {
LaunchedEffect(fontSizeMultiplier, lineHeightMultiplier, paragraphGapMultiplier, fontFamily, textAlign) {
if (fontSizeMultiplier != debouncedFontSizeMult || lineHeightMultiplier != debouncedLineHeightMult || paragraphGapMultiplier != debouncedParagraphGapMult || fontFamily != debouncedFontFamily || textAlign != debouncedTextAlign) {
Timber.d("Formatting changed. Waiting for debounce.")
delay(400L)
@ -627,6 +630,7 @@ fun PaginatedReaderScreen(
debouncedFontSizeMult = fontSizeMultiplier
debouncedLineHeightMult = lineHeightMultiplier
debouncedParagraphGapMult = paragraphGapMultiplier
debouncedFontFamily = fontFamily
debouncedTextAlign = textAlign
Timber.d("Debounce complete. Applying new format settings.")
@ -642,7 +646,7 @@ fun PaginatedReaderScreen(
}
val density = LocalDensity.current
val horizontalPadding = 16.dp
val horizontalPadding = if (removeEdgePadding) 0.dp else 16.dp
val verticalPadding = 16.dp
val textConstraints =
@ -673,8 +677,8 @@ fun PaginatedReaderScreen(
remember(initialChapterIndexInBook, anchorLocatorForReconfig) {
anchorLocatorForReconfig?.chapterIndex ?: initialChapterIndexInBook ?: 0
}
val paginator = remember(book, textConstraints, isDarkTheme, textStyle, userTextAlign, effectiveBg, effectiveText) {
val userAgentStylesheet = UserAgentStylesheet.default
val paginator = remember(book, textConstraints, isDarkTheme, textStyle, userTextAlign, effectiveBg, effectiveText, debouncedParagraphGapMult) {
val userAgentStylesheet = UserAgentStylesheet.default
var allRules = OptimizedCssRules()
val allFontFaces = mutableListOf<FontFaceInfo>()
@ -739,7 +743,8 @@ fun PaginatedReaderScreen(
allFontFaces = allFontFaces,
context = context.applicationContext,
mathMLRenderer = mathMLRenderer,
userTextAlign = userTextAlign
userTextAlign = userTextAlign,
paragraphGapMultiplier = debouncedParagraphGapMult
)
}
@ -1171,7 +1176,6 @@ private fun TextWithEmphasis(
is HeaderBlock -> block.startCharOffsetInSource
is QuoteBlock -> block.startCharOffsetInSource
is ListItemBlock -> block.startCharOffsetInSource
else -> 0
}
val isStart = block.blockIndex == activeSelection.startBlockIndex && currentBlockAbs == activeSelection.startBlockCharOffset
@ -1276,76 +1280,6 @@ private fun TextWithEmphasis(
}
.then(customDrawer)
.pointerInput(userHighlights, text) {
awaitEachGesture {
val down = awaitFirstDown(
pass = PointerEventPass.Initial, requireUnconsumed = false
)
val layout = textLayoutResult
if (layout != null) {
val hit = getHighlightAt(down.position, layout)
if (hit != null) {
down.consume()
val startPosition = down.position
var dragDistance = 0f
var isFinished = false
val longPressJob = scope.launch {
delay(500)
pressedHighlightCfi = hit.first.cfi
}
try {
while (true) {
val event = awaitPointerEvent(
pass = PointerEventPass.Initial
)
val change = event.changes.firstOrNull {
it.id == down.id
}
if (change == null) {
longPressJob.cancel()
pressedHighlightCfi = null
break
}
change.consume()
if (change.pressed) {
dragDistance = (change.position - startPosition).getDistance()
if (dragDistance >= viewConfiguration.touchSlop) {
longPressJob.cancel()
pressedHighlightCfi = null
}
} else {
isFinished = true
longPressJob.cancel()
pressedHighlightCfi = null
break
}
}
} catch (_: Exception) {
longPressJob.cancel()
pressedHighlightCfi = null
}
if (isFinished && dragDistance < viewConfiguration.touchSlop) {
val (highlight, localRect) = hit
val globalRect = layoutCoordinates?.let { coords ->
if (coords.isAttached) {
val topLeft = coords.localToWindow(
localRect.topLeft
)
val bottomRight = coords.localToWindow(
localRect.bottomRight
)
Rect(topLeft, bottomRight)
} else null
} ?: localRect
onHighlightClick(highlight, globalRect)
}
}
}
}
}
.pointerInput(text) {
detectTapGestures(
onLongPress = { offset ->
textLayoutResult?.let { layout ->
@ -1355,7 +1289,6 @@ private fun TextWithEmphasis(
var start = wordBoundary.start
var end = wordBoundary.end
// Trim trailing/leading punctuations for a cleaner word selection
val textStr = text.text
while (start < end && start < textStr.length && !textStr[start].isLetterOrDigit()) start++
while (end > start && end <= textStr.length && !textStr[end - 1].isLetterOrDigit()) end--
@ -1377,7 +1310,6 @@ private fun TextWithEmphasis(
is HeaderBlock -> block.startCharOffsetInSource
is QuoteBlock -> block.startCharOffsetInSource
is ListItemBlock -> block.startCharOffsetInSource
else -> 0
}
onSelectionChange(
@ -1402,14 +1334,27 @@ private fun TextWithEmphasis(
},
onTap = { offset ->
textLayoutResult?.let { layout ->
val hit = getHighlightAt(offset, layout)
if (hit != null) {
val (highlight, localRect) = hit
val globalRect = layoutCoordinates?.let { coords ->
if (coords.isAttached) {
val topLeft = coords.localToWindow(localRect.topLeft)
val bottomRight = coords.localToWindow(localRect.bottomRight)
Rect(topLeft, bottomRight)
} else null
} ?: localRect
onHighlightClick(highlight, globalRect)
return@detectTapGestures
}
val charOffset = layout.getOffsetForPosition(offset)
val urlAnnotation = text.getStringAnnotations(
"URL", charOffset, charOffset
).firstOrNull()
val urlAnnotation = text.getStringAnnotations("URL", charOffset, charOffset).firstOrNull()
if (urlAnnotation != null) onLinkClick(urlAnnotation.item)
else onGeneralTap(offset)
}
})
}
)
}, onTextLayout = {
textLayoutResult = it
if (layoutCoordinates != null && block.cfi != null) {
@ -1713,7 +1658,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> firstTextBlock.startCharOffsetInSource
is QuoteBlock -> firstTextBlock.startCharOffsetInSource
is ListItemBlock -> firstTextBlock.startCharOffsetInSource
else -> 0
}
val newTextPerBlock = (previousSel?.textPerBlock ?: emptyMap()).toMutableMap()
@ -2853,7 +2797,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> block.startCharOffsetInSource
is QuoteBlock -> block.startCharOffsetInSource
is ListItemBlock -> block.startCharOffsetInSource
else -> 0
}
val isStartBlockPart = block.blockIndex == sel.startBlockIndex && currentBlockAbs == sel.startBlockCharOffset
val isEndBlockPart = block.blockIndex == sel.endBlockIndex && currentBlockAbs == sel.endBlockCharOffset
@ -3008,7 +2951,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> block.startCharOffsetInSource
is QuoteBlock -> block.startCharOffsetInSource
is ListItemBlock -> block.startCharOffsetInSource
else -> 0
}
var newStartBlockAbs = if (isStartHandle) currentBlockAbs else sel.startBlockCharOffset
var newEndBlockAbs = if (!isStartHandle) currentBlockAbs else sel.endBlockCharOffset
@ -3044,7 +2986,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> (b.third as HeaderBlock).startCharOffsetInSource
is QuoteBlock -> (b.third as QuoteBlock).startCharOffsetInSource
is ListItemBlock -> (b.third as ListItemBlock).startCharOffsetInSource
else -> 0
}
}))
@ -3061,7 +3002,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> b.third.startCharOffsetInSource
is QuoteBlock -> b.third.startCharOffsetInSource
is ListItemBlock -> b.third.startCharOffsetInSource
else -> 0
}
val isStartBlockPart = b.third.blockIndex == newStartIdx && bAbs == newStartBlockAbs
val isEndBlockPart = b.third.blockIndex == newEndIdx && bAbs == newEndBlockAbs
@ -3092,7 +3032,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> it.third.startCharOffsetInSource
is QuoteBlock -> it.third.startCharOffsetInSource
is ListItemBlock -> it.third.startCharOffsetInSource
else -> 0
}
abs == newStartBlockAbs
}
@ -3187,7 +3126,6 @@ internal fun PaginatedReaderContent(
is HeaderBlock -> block.startCharOffsetInSource
is QuoteBlock -> block.startCharOffsetInSource
is ListItemBlock -> block.startCharOffsetInSource
else -> 0
}
blockAbs == targetBlockAbs
}

6
app/src/main/java/com/aryan/reader/paginatedreader/PaginatedReaderViewModel.kt
View file

@ -76,7 +76,8 @@ class PaginatedReaderViewModel : ViewModel() {
themeTextColor: androidx.compose.ui.graphics.Color,
context: Context,
initialChapterToPaginate: Int?,
mathMLRenderer: MathMLRenderer
mathMLRenderer: MathMLRenderer,
paragraphGapMultiplier: Float
) {
if (paginator != null) return
@ -142,7 +143,8 @@ class PaginatedReaderViewModel : ViewModel() {
allFontFaces = allFontFaces,
context = context.applicationContext,
mathMLRenderer = mathMLRenderer,
userTextAlign = null
userTextAlign = null,
paragraphGapMultiplier = paragraphGapMultiplier
)
paginator = newPaginator

10
app/src/main/java/com/aryan/reader/paginatedreader/data/BookCacheDatabase.kt
View file

@ -178,6 +178,16 @@ abstract class BookCacheDao {
@Insert(onConflict = OnConflictStrategy.REPLACE)
abstract suspend fun insertConfigurationCache(cache: ConfigurationCache)
@Query("""
DELETE FROM configuration_cache
WHERE bookId = :bookId AND configHash NOT IN (
SELECT configHash FROM configuration_cache
WHERE bookId = :bookId
ORDER BY rowid DESC LIMIT 3
)
""")
abstract suspend fun cleanupOldConfigurations(bookId: String)
}
@Database(

2
app/src/main/res/values/strings.xml
View file

@ -631,6 +631,8 @@
<string name="visual_options_progress_bar_desc">The reading progress and chapter indicator at the bottom of the screen.</string>
<string name="visual_options_seamless_chapter">Seamless Chapter Transition</string>
<string name="visual_options_seamless_chapter_desc">Instantly load the next/previous chapter when scrolling past the end, without the pull-to-refresh animation.</string>
<string name="visual_options_edge_padding">Remove Edge Padding</string>
<string name="visual_options_edge_padding_desc">Removes the horizontal gap on the left and right edges.</string>
<!-- ExternalDictionaryHelper.kt -->
<string name="dict_app_label_search">Search</string>