moving page border size to parameter, also making it optional

Author: mspnr

pdfview-library/src/main/java/com/pdfview/PDFRegionDecoder.kt

@@ -13,6 +13,7 @@ import java.io.File
 internal class PDFRegionDecoder(private val view: PDFView,
                                 private val file: File,
                                 private val scale: Float,
+                                private val borderSize: Float = 0.0f, // size in mm, zero to skip drawing
                                 @param:ColorInt private val backgroundColorPdf: Int = Color.WHITE) : ImageRegionDecoder {
 
     private lateinit var descriptor: ParcelFileDescriptor
@@ -41,12 +42,6 @@ internal class PDFRegionDecoder(private val view: PDFView,
         val numPageAtEnd = Math.ceil(rect.bottom.toDouble() / pageHeight).toInt() - 1
         val bitmap = Bitmap.createBitmap(rect.width() / sampleSize, rect.height() / sampleSize, Bitmap.Config.ARGB_8888)
         val canvas = Canvas(bitmap)
-        val pageBorderPaint = Paint().apply() {
-            color = Color.BLACK
-            style = Paint.Style.STROKE
-            isAntiAlias = true // for lines thinner than 1
-            strokeWidth = 0.5f * 160f / 25.4f / sampleSize  //  = 0.5 mm
-        }
         canvas.drawColor(backgroundColorPdf)
         canvas.drawBitmap(bitmap, 0f, 0f, null)
         for ((iteration, pageIndex) in (numPageAtStart..numPageAtEnd).withIndex()) {
@@ -58,9 +53,16 @@ internal class PDFRegionDecoder(private val view: PDFView,
                         (-rect.left / sampleSize).toFloat(), -((rect.top - pageHeight * numPageAtStart) / sampleSize).toFloat() + (pageHeight.toFloat() / sampleSize) * iteration)
                 page.render(bitmap,null, matrix, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY)
                 page.close()
-                val pageBorderRect = RectF(0f, 0f, page.width.toFloat(), page.height.toFloat())
-                matrix.mapRect(pageBorderRect)
-                canvas.drawRect(pageBorderRect, pageBorderPaint)
+                if (borderSize > 0) {
+                    val pageBorderRect = RectF(0f, 0f, page.width.toFloat(), page.height.toFloat())
+                    matrix.mapRect(pageBorderRect)
+                    canvas.drawRect(pageBorderRect, Paint().apply() {
+                        color = Color.BLACK
+                        style = Paint.Style.STROKE
+                        isAntiAlias = true // for lines thinner than 1
+                        strokeWidth = borderSize * 160f / 25.4f / sampleSize  //  = 0.5 mm
+                    })
+                }
             }
         }
         return bitmap

pdfview-library/src/main/java/com/pdfview/PDFView.kt

@@ -38,7 +38,7 @@ class PDFView @JvmOverloads constructor(context: Context, attrs: AttributeSet? =
 
     fun show() {
         val source = ImageSource.uri(mfile!!.path)
-        setRegionDecoderFactory { PDFRegionDecoder(view = this, file = mfile!!, scale = mScale) }
+        setRegionDecoderFactory { PDFRegionDecoder(view = this, file = mfile!!, scale = mScale, borderSize = 0.5f) }
         setImage(source)
     }