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Pdf auto scroll (#5)

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* docs: Revamp README and add APK naming convention

This commit introduces a complete overhaul of the `README.md` to improve project presentation. Key changes include:
*   Adds a new header with the app icon and a Google Play badge.
*   Updates the feature graphic and includes a note distinguishing the OSS version from the Play Store version.
*   Refines the "Open Source Libraries" section to be more structured.
*   Moves the main preview image into the `docs` directory.

Additionally, the `app/build.gradle.kts` file is updated to configure a standardized naming convention for output APK files, including flavor, version, and build type.

* refactor copyright headers and fix README icon alignment

This commit introduces two main changes across the codebase:

The `spotless/copyright.kt` template have been updated for consistency:
*   The author name is simplified from "Episteme Authors" to "Episteme".
*   The contact email prefix is shortened from "Electronic mail:" to "mail:".

Second, the `README.md` file is adjusted to correct the vertical alignment of the app icon with the project title.

* Added auto-scroll feature for PDF vertical reader
This commit is contained in:
Aryan 2026-02-26 10:21:17 +05:30 • committed by GitHub
parent 1f35cd8138
commit 1b048c9073
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3 changed files with 127 additions and 7 deletions
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43
app/src/main/java/com/aryan/reader/pdf/PdfVerticalReader.kt
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@ -17,6 +17,7 @@
*
* mail: epistemereader@gmail.com
*/
// PdfVerticalReader.kt
@file:Suppress("COMPOSE_APPLIER_CALL_MISMATCH", "VariableNeverRead")
package com.aryan.reader.pdf
@ -210,7 +211,10 @@ internal fun PdfVerticalReader(
onTextBoxSelect: (String) -> Unit = {},
bottomContentPaddingPx: Float = 0f,
topContentPaddingPx: Float = 0f,
onTextBoxMoved: (String, Int, Rect) -> Unit = { _, _, _ -> }
onTextBoxMoved: (String, Int, Rect) -> Unit = { _, _, _ -> },
isAutoScrollPlaying: Boolean = false,
autoScrollSpeed: Float = 1.0f,
onInteractionListener: () -> Unit = {}
) {
SideEffect { Timber.tag("PdfDrawPerf").v("LIST: PdfVerticalReader Recomposing.") }
var globalEraserPosition by remember { mutableStateOf<Offset?>(null) }
@ -480,9 +484,46 @@ internal fun PdfVerticalReader(
}
}
LaunchedEffect(isAutoScrollPlaying, autoScrollSpeed, totalDocHeight, screenHeight) {
if (isAutoScrollPlaying) {
val baseSpeedPxPerSec = 30f
var lastFrameTime = withFrameNanos { it }
while (isActive) {
val frameTime = withFrameNanos { it }
val deltaSeconds = (frameTime - lastFrameTime) / 1_000_000_000f
lastFrameTime = frameTime
if (deltaSeconds > 0.1f) continue
val pixelMove = (baseSpeedPxPerSec * autoScrollSpeed) * deltaSeconds
val currentPanY = panYAnimatable.value
val currentZoom = zoomAnimatable.value
val zoomedDocHeight = totalDocHeight * currentZoom
val minPanY = (screenHeight - footerHeightPx - zoomedDocHeight).coerceAtMost(headerHeightPx)
val newPanY = (currentPanY - pixelMove).coerceIn(minPanY, headerHeightPx)
panYAnimatable.snapTo(newPanY)
@Suppress("ControlFlowWithEmptyBody") if (newPanY <= minPanY + 0.1f) {
// Reached end
}
}
}
}
var highResScale by remember { mutableFloatStateOf(1f) }
var isInteracting by remember { mutableStateOf(false) }
LaunchedEffect(isInteracting) {
if (isInteracting && isAutoScrollPlaying) {
onInteractionListener()
}
}
LaunchedEffect(isInteracting) {
Timber.tag("PdfTouchDebug").i("VerticalReader: isInteracting changed to $isInteracting")
}