Feature/highlighter snap (#48)
* perf: fix Home and Library screen stutter by removing main thread file checks * feat(pdf): implement straight-line highlighter snap - Added "Straight Line" toggle to highlighter settings popup with persistent state. - Implemented "rubber-band" drawing effect for highlighters with cardinal direction snapping (0°, 90°, 180°, 270°). - Optimized gesture loops in Vertical and Paginated readers to respond instantly to setting toggles. - Rewrote eraser hit detection using point-to-line segment distance math for pixel-perfect erasure of straight lines.
This commit is contained in:
Aryan
GitHub
parent
6ea414c9b2
commit
8c7c8cb48e
8 changed files with 203 additions and 61 deletions
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@ -417,7 +417,8 @@ internal fun PdfPageComposable(
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draggingBoxId: String? = null,
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isScrollLocked: Boolean = false,
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isVisible: Boolean = true,
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isStylusOnlyMode: Boolean = false
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isStylusOnlyMode: Boolean = false,
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isHighlighterSnapEnabled: Boolean = false
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) {
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SideEffect { Timber.tag("PdfDrawPerf").v("PdfPageComposable Recompose: Page $pageIndex") }
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val pdfDocumentItem = pdfDocument.item
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@ -2608,7 +2609,8 @@ internal fun PdfPageComposable(
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isScrolling,
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isVerticalScroll,
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selectedTool,
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isStylusOnlyMode
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isStylusOnlyMode,
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isHighlighterSnapEnabled
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) {
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val canDraw = isEditMode && selectedTool != InkType.TEXT && !isScrolling && !isVerticalScroll && actualBitmapWidthPx > 0 && actualBitmapHeightPx > 0
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@ -4611,6 +4613,16 @@ class PdfDrawingState {
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currentPoints.clear()
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return finalAnnot
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}
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fun updateDrag(point: PdfPoint) {
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if (currentPoints.isNotEmpty()) {
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val start = currentPoints.first()
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currentPoints.clear()
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currentPoints.add(start)
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currentPoints.add(point)
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currentAnnotation = currentAnnotation?.copy(points = currentPoints.toList())
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}
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}
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}
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@Composable
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@ -222,7 +222,8 @@ internal fun PdfVerticalReader(
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isScrollLocked: Boolean = false,
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autoScrollSpeed: Float = 1.0f,
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onInteractionListener: () -> Unit = {},
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isStylusOnlyMode: Boolean = false
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isStylusOnlyMode: Boolean = false,
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isHighlighterSnapEnabled: Boolean = false
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) {
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SideEffect { Timber.tag("PdfDrawPerf").v("LIST: PdfVerticalReader Recomposing.") }
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var globalEraserPosition by remember { mutableStateOf<Offset?>(null) }
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@ -748,7 +749,13 @@ internal fun PdfVerticalReader(
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}
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}
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val globalDrawingModifier = Modifier.pointerInput(isEditMode, layoutInfo, selectedTool, isStylusOnlyMode) {
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val globalDrawingModifier = Modifier.pointerInput(
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isEditMode,
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layoutInfo,
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selectedTool,
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isStylusOnlyMode,
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isHighlighterSnapEnabled
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) {
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if (!isEditMode) return@pointerInput
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if (selectedTool == InkType.TEXT) return@pointerInput
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@ -864,7 +871,14 @@ internal fun PdfVerticalReader(
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onDoubleTapToZoom(offset)
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})
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}
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.pointerInput(totalDocHeight, isEditMode, selectedTool, isScrollLocked, isStylusOnlyMode) {
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.pointerInput(
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totalDocHeight,
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isEditMode,
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selectedTool,
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isScrollLocked,
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isStylusOnlyMode,
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isHighlighterSnapEnabled
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) {
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val tracker = VelocityTracker()
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val decay = exponentialDecay<Float>()
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val touchSlop = viewConfiguration.touchSlop
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@ -89,7 +89,6 @@ import androidx.compose.foundation.text.BasicTextField
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import androidx.compose.foundation.text.KeyboardActions
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import androidx.compose.material.icons.Icons
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import androidx.compose.material.icons.automirrored.filled.ArrowBack
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import androidx.compose.material.icons.automirrored.filled.MenuBook
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import androidx.compose.material.icons.filled.ArrowDownward
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import androidx.compose.material.icons.filled.ArrowUpward
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import androidx.compose.material.icons.filled.Brush
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@ -981,6 +980,8 @@ fun PdfViewerScreen(
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var showToolSettings by remember { mutableStateOf(false) }
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val isHighlighterSnapEnabled = toolSettings.isHighlighterSnapEnabled
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val selectedTool = toolSettings.getActiveTool()
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val lastPenTool = toolSettings.getLastPenTool()
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@ -999,6 +1000,9 @@ fun PdfViewerScreen(
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val isCurrentToolHighlighter =
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selectedTool == InkType.HIGHLIGHTER || selectedTool == InkType.HIGHLIGHTER_ROUND
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val currentSnapEnabled by rememberUpdatedState(isHighlighterSnapEnabled)
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val currentIsHighlighter by rememberUpdatedState(isCurrentToolHighlighter)
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val penPalette = remember(toolSettings.penPaletteArgb) { toolSettings.getPenPalette() }
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val highlighterPalette =
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remember(toolSettings.highlighterPaletteArgb) { toolSettings.getHighlighterPalette() }
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@ -1272,6 +1276,36 @@ fun PdfViewerScreen(
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}
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}
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val calculateSnappedPoint = remember(pageAspectRatios) {
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{ pageIndex: Int, currentPoint: PdfPoint, startPoint: PdfPoint? ->
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if (startPoint == null) {
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currentPoint
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} else {
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val aspectRatio = pageAspectRatios.getOrElse(pageIndex) { 1f }
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val dx = (currentPoint.x - startPoint.x) * aspectRatio
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val dy = (currentPoint.y - startPoint.y)
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val angleRad = kotlin.math.atan2(dy, dx)
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val angleDeg = (angleRad * 180 / kotlin.math.PI)
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val absAngle = kotlin.math.abs(angleDeg)
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val threshold = 10.0
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val isHorizontal = absAngle < threshold || kotlin.math.abs(absAngle - 180.0) < threshold
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val isVertical = kotlin.math.abs(absAngle - 90.0) < threshold
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if (isHorizontal) {
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currentPoint.copy(y = startPoint.y)
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} else if (isVertical) {
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currentPoint.copy(x = startPoint.x)
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} else {
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currentPoint
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}
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}
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}
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}
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val onDeletePage: () -> Unit = {
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coroutineScope.launch {
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if (currentBookId != null && currentPage in virtualPages.indices) {
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@ -2095,13 +2129,42 @@ fun PdfViewerScreen(
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}
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fun isAnnotationHit(
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annotation: PdfAnnotation, hitPoint: PdfPoint, threshold: Float = 0.05f
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annotation: PdfAnnotation,
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hitPoint: PdfPoint,
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pageAspectRatio: Float,
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threshold: Float = 0.025f
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): Boolean {
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return annotation.points.any { p ->
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val dx = p.x - hitPoint.x
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val dy = p.y - hitPoint.y
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(dx * dx + dy * dy) < (threshold * threshold)
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if (annotation.points.isEmpty()) return false
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if (annotation.points.size == 1) {
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val p = annotation.points[0]
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val dx = (p.x - hitPoint.x) * pageAspectRatio
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val dy = (p.y - hitPoint.y)
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return (dx * dx + dy * dy) < (threshold * threshold)
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}
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for (i in 0 until annotation.points.size - 1) {
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val a = annotation.points[i]
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val b = annotation.points[i + 1]
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val pax = (hitPoint.x - a.x) * pageAspectRatio
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val pay = (hitPoint.y - a.y)
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val bax = (b.x - a.x) * pageAspectRatio
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val bay = (b.y - a.y)
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val segmentLenSq = (bax * bax + bay * bay).coerceAtLeast(1e-6f)
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val t = (pax * bax + pay * bay) / segmentLenSq
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val tClamped = t.coerceIn(0f, 1f)
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val closestX = bax * tClamped
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val closestY = bay * tClamped
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val distSq = (pax - closestX) * (pax - closestX) + (pay - closestY) * (pay - closestY)
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if (distSq < (threshold * threshold)) return true
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}
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return false
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}
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fun startTts(pageToReadOverride: Int? = null) {
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@ -3407,10 +3470,10 @@ fun PdfViewerScreen(
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{ point: PdfPoint ->
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if (currentSelectedTool == InkType.TEXT) {
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} else if (currentSelectedTool == InkType.ERASER) {
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val existing =
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allAnnotations[pageIndex] ?: emptyList()
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val aspectRatio = pageAspectRatios.getOrElse(pageIndex) { 1f }
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val existing = allAnnotations[pageIndex] ?: emptyList()
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val toRemove = existing.filter {
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isAnnotationHit(it, point)
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isAnnotationHit(it, point, aspectRatio)
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}
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if (toRemove.isNotEmpty()) {
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val batch =
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@ -3427,10 +3490,13 @@ fun PdfViewerScreen(
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allAnnotations + (pageIndex to newList)
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}
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} else {
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val pointWithTime = point.copy(
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timestamp = System.currentTimeMillis()
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)
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drawingState.onDraw(pointWithTime)
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if (currentIsHighlighter && currentSnapEnabled) {
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val startPoint = drawingState.currentAnnotation?.points?.firstOrNull()
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val effectivePoint = calculateSnappedPoint(pageIndex, point, startPoint)
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drawingState.updateDrag(effectivePoint.copy(timestamp = System.currentTimeMillis()))
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} else {
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drawingState.onDraw(point.copy(timestamp = System.currentTimeMillis()))
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}
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}
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}
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}
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@ -3451,13 +3517,10 @@ fun PdfViewerScreen(
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if (currentSelectedTool == InkType.TEXT) {
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} else if (currentSelectedTool == InkType.ERASER) {
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erasedAnnotationsFromStroke.clear()
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val existing = allAnnotations[pageIndex]
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?: emptyList()
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val aspectRatio = pageAspectRatios.getOrElse(pageIndex) { 1f }
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val existing = allAnnotations[pageIndex] ?: emptyList()
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val toRemove = existing.filter {
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isAnnotationHit(
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it, point
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)
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isAnnotationHit(it, point, aspectRatio)
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}
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if (toRemove.isNotEmpty()) {
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val batch =
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@ -3581,6 +3644,7 @@ fun PdfViewerScreen(
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},
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richTextController = richTextController,
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isStylusOnlyMode = isStylusOnlyMode,
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isHighlighterSnapEnabled = isHighlighterSnapEnabled,
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isEditMode = isDrawingActive,
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textBoxes = textBoxes.filter { it.pageIndex == pageIndex },
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selectedTextBoxId = selectedTextBoxId,
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@ -3791,10 +3855,10 @@ fun PdfViewerScreen(
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} else if (currentSelectedTool == InkType.ERASER) {
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erasedAnnotationsFromStroke.clear()
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val existing =
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allAnnotations[pageIndex] ?: emptyList()
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val aspectRatio = pageAspectRatios.getOrElse(pageIndex) { 1f }
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val existing = allAnnotations[pageIndex] ?: emptyList()
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val toRemove = existing.filter {
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isAnnotationHit(it, point)
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isAnnotationHit(it, point, aspectRatio)
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}
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if (toRemove.isNotEmpty()) {
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val batch =
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@ -3826,13 +3890,13 @@ fun PdfViewerScreen(
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}
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}
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val onDrawStable = remember {
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val onDrawStable = remember(isHighlighterSnapEnabled, isCurrentToolHighlighter, calculateSnappedPoint) {
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{ pageIndex: Int, point: PdfPoint ->
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if (currentSelectedTool == InkType.ERASER) {
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val existing =
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allAnnotations[pageIndex] ?: emptyList()
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val aspectRatio = pageAspectRatios.getOrElse(pageIndex) { 1f }
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val existing = allAnnotations[pageIndex] ?: emptyList()
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val toRemove = existing.filter {
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isAnnotationHit(it, point)
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isAnnotationHit(it, point, aspectRatio)
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}
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if (toRemove.isNotEmpty()) {
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val batch =
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@ -3846,10 +3910,13 @@ fun PdfViewerScreen(
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allAnnotations + (pageIndex to newList)
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}
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} else {
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val pointWithTime = point.copy(
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timestamp = System.currentTimeMillis()
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)
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drawingState.onDraw(pointWithTime)
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if (currentIsHighlighter && currentSnapEnabled) {
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val startPoint = drawingState.currentAnnotation?.points?.firstOrNull()
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val effectivePoint = calculateSnappedPoint(pageIndex, point, startPoint)
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drawingState.updateDrag(effectivePoint.copy(timestamp = System.currentTimeMillis()))
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} else {
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drawingState.onDraw(point.copy(timestamp = System.currentTimeMillis()))
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}
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}
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}
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}
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@ -3898,6 +3965,7 @@ fun PdfViewerScreen(
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allAnnotations = allAnnotationsProvider,
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drawingState = drawingState,
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onDrawStart = onDrawStartStable,
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isHighlighterSnapEnabled = isHighlighterSnapEnabled,
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onDraw = onDrawStable,
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onDrawEnd = {
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val finalAnnotation = drawingState.onDrawEnd()
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@ -5198,7 +5266,10 @@ fun PdfViewerScreen(
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} else {
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annotationSettingsRepo.updatePenPalette(newPalette)
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}
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})
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},
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isHighlighterSnapEnabled = isHighlighterSnapEnabled,
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onSnapToggle = { annotationSettingsRepo.updateHighlighterSnap(it) }
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)
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}
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snapPreviewLocation?.let { location ->
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@ -5357,7 +5428,7 @@ fun PdfViewerScreen(
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saveStylusOnlyMode(context, isStylusOnlyMode)
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},
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onToolClick = { clickedTool ->
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if (clickedTool == InkType.ERASER) {
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if (clickedTool == InkType.ERASER || clickedTool == InkType.TEXT) {
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annotationSettingsRepo.updateSelectedTool(
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clickedTool
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)
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@ -60,7 +60,8 @@ fun PenIcon(
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isSelected: Boolean = false,
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strokeWidth: Float = 0.005f,
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forcedInkType: InkType? = null,
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inkColor: Color? = null
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inkColor: Color? = null,
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isSnappingEnabled: Boolean = false
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) {
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val animatedColor by animateColorAsState(targetValue = color, label = "color")
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@ -129,10 +130,11 @@ fun PenIcon(
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drawInkSquiggle(
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type = type,
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forcedInkType = forcedInkType,
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color = animatedInkColor, // Use the specific ink color
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color = animatedInkColor,
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progress = inkProgress,
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startPoint = Offset(tipX, tipY),
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baseStrokeWidth = strokeWidth
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baseStrokeWidth = strokeWidth,
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isStraight = isSnappingEnabled
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)
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}
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}
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@ -413,7 +415,8 @@ private fun DrawScope.drawInkSquiggle(
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color: Color,
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progress: Float,
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startPoint: Offset,
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baseStrokeWidth: Float
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baseStrokeWidth: Float,
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isStraight: Boolean = false
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) {
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val x = startPoint.x
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val y = startPoint.y - 2f
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@ -422,13 +425,17 @@ private fun DrawScope.drawInkSquiggle(
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if (type == PenType.HIGHLIGHTER || type == PenType.HIGHLIGHTER_ROUND) {
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val waveWidth = 70f
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val amplitude = 20f
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cubicTo(
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x + waveWidth * 0.35f, y - amplitude,
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x + waveWidth * 0.65f, y + amplitude,
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x + waveWidth, y
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)
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if (isStraight) {
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lineTo(x + waveWidth, y)
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} else {
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val amplitude = 20f
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cubicTo(
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x + waveWidth * 0.35f, y - amplitude,
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x + waveWidth * 0.65f, y + amplitude,
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x + waveWidth, y
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)
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}
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} else {
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cubicTo(
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x + 35f, y - 40f,
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|
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@ -49,6 +49,8 @@ import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.Slider
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import androidx.compose.material3.SliderDefaults
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import androidx.compose.material3.Surface
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import androidx.compose.material3.Switch
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import androidx.compose.material3.SwitchDefaults
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import androidx.compose.material3.Text
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import androidx.compose.material3.TextButton
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import androidx.compose.runtime.Composable
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@ -103,7 +105,9 @@ fun ToolSettingsPopup(
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onColorChanged: (Color) -> Unit,
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onThicknessChanged: (Float) -> Unit,
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onPaletteChange: (List<Color>) -> Unit,
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modifier: Modifier = Modifier
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modifier: Modifier = Modifier,
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isHighlighterSnapEnabled: Boolean = false,
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onSnapToggle: (Boolean) -> Unit = {}
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) {
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val isHighlighter = selectedTool == InkType.HIGHLIGHTER || selectedTool == InkType.HIGHLIGHTER_ROUND
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@ -157,10 +161,9 @@ fun ToolSettingsPopup(
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tonalElevation = 0.dp
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) {
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Column(
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modifier = Modifier.padding(20.dp), // Reduced padding
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modifier = Modifier.padding(20.dp),
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horizontalAlignment = Alignment.CenterHorizontally
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) {
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// Pen Type Selector
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Box(
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modifier = Modifier
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.fillMaxWidth()
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@ -179,7 +182,8 @@ fun ToolSettingsPopup(
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inkColor = highlighterColor,
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isSelected = selectedTool == InkType.HIGHLIGHTER,
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strokeWidth = activeToolThickness,
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onClick = { onToolTypeChanged(InkType.HIGHLIGHTER) }
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onClick = { onToolTypeChanged(InkType.HIGHLIGHTER) },
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isSnappingEnabled = isHighlighterSnapEnabled
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)
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PenItem(
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@ -189,7 +193,8 @@ fun ToolSettingsPopup(
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inkColor = highlighterRoundColor,
|
||||
isSelected = selectedTool == InkType.HIGHLIGHTER_ROUND,
|
||||
strokeWidth = activeToolThickness,
|
||||
onClick = { onToolTypeChanged(InkType.HIGHLIGHTER_ROUND) }
|
||||
onClick = { onToolTypeChanged(InkType.HIGHLIGHTER_ROUND) },
|
||||
isSnappingEnabled = isHighlighterSnapEnabled
|
||||
)
|
||||
} else {
|
||||
PenItem(
|
||||
|
|
@ -224,6 +229,32 @@ fun ToolSettingsPopup(
|
|||
|
||||
Spacer(Modifier.height(16.dp))
|
||||
|
||||
if (isHighlighter) {
|
||||
Row(
|
||||
modifier = Modifier.fillMaxWidth(),
|
||||
verticalAlignment = Alignment.CenterVertically,
|
||||
horizontalArrangement = Arrangement.SpaceBetween
|
||||
) {
|
||||
Text(
|
||||
text = "Straight Line",
|
||||
color = Color.White,
|
||||
style = MaterialTheme.typography.bodyMedium
|
||||
)
|
||||
Switch(
|
||||
checked = isHighlighterSnapEnabled,
|
||||
onCheckedChange = onSnapToggle,
|
||||
colors = SwitchDefaults.colors(
|
||||
checkedThumbColor = Color.White,
|
||||
checkedTrackColor = activeColor.copy(alpha = 1f),
|
||||
uncheckedThumbColor = Color.Gray,
|
||||
uncheckedTrackColor = Color(0xFF424242)
|
||||
),
|
||||
modifier = Modifier.scale(0.8f)
|
||||
)
|
||||
}
|
||||
Spacer(Modifier.height(16.dp))
|
||||
}
|
||||
|
||||
// THICKNESS SLIDER
|
||||
StyledPropertySlider(
|
||||
value = activeToolThickness,
|
||||
|
|
@ -811,7 +842,8 @@ private fun PenItem(
|
|||
strokeWidth: Float,
|
||||
onClick: () -> Unit,
|
||||
forcedInkType: InkType? = null,
|
||||
inkColor: Color? = null
|
||||
inkColor: Color? = null,
|
||||
isSnappingEnabled: Boolean = false
|
||||
) {
|
||||
val scale by animateFloatAsState(
|
||||
targetValue = if (isSelected) 1.15f else 0.9f, label = "scale"
|
||||
|
|
@ -834,7 +866,8 @@ private fun PenItem(
|
|||
isSelected = isSelected,
|
||||
strokeWidth = strokeWidth,
|
||||
forcedInkType = forcedInkType,
|
||||
modifier = Modifier.fillMaxSize()
|
||||
modifier = Modifier.fillMaxSize(),
|
||||
isSnappingEnabled = isSnappingEnabled
|
||||
)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -74,7 +74,8 @@ data class AnnotationToolSettings(
|
|||
"#8C64B5F6".toColorInt(), // Blue
|
||||
"#8CE1BEE7".toColorInt(), // Purple
|
||||
),
|
||||
val textStyle: TextStyleConfig = TextStyleConfig()
|
||||
val textStyle: TextStyleConfig = TextStyleConfig(),
|
||||
val isHighlighterSnapEnabled: Boolean = false
|
||||
) {
|
||||
fun getActiveTool(): InkType = try {
|
||||
InkType.valueOf(selectedToolName)
|
||||
|
|
@ -180,6 +181,10 @@ class AnnotationSettingsRepository(context: Context) {
|
|||
saveSettings(_settings.value.copy(highlighterPaletteArgb = colors.map { it.toArgb() }))
|
||||
}
|
||||
|
||||
fun updateHighlighterSnap(enabled: Boolean) {
|
||||
saveSettings(_settings.value.copy(isHighlighterSnapEnabled = enabled))
|
||||
}
|
||||
|
||||
fun updateTextStyle(style: TextStyleConfig) {
|
||||
saveSettings(_settings.value.copy(textStyle = style))
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue