fun paragraphWithTabulationReplacingTabs1()

in skiko/src/webTest/kotlin/org/jetbrains/skia/ParagraphWebTest.kt [19:70]
46 lines of code
8 McCabe index (conditional complexity)

    fun paragraphWithTabulationReplacingTabs1() {
        val paragraphStyle = ParagraphStyle().apply {
            replaceTabCharacters = true
            textStyle = TextStyle().apply {
                this.fontSize = 32.0f
            }.setColor(Color.BLACK)
        }
        val paragraph = ParagraphBuilder(paragraphStyle, fontCollection).use {
            it.addText("\t\t\t  .")
            it.build().layout(100.0f)
        }

        val surface = Surface.makeRasterN32Premul(100, 50)
        surface.canvas.clear(Color.WHITE)
        paragraph.paint(surface.canvas, 0.0f, 0.0f)
        surface.makeImageSnapshot().use { image ->
            val bitmap = Bitmap.makeFromImage(image)
            assertTrue(bitmap.height == 50)
            assertTrue(bitmap.width == 100)

            val right = paragraph.lineMetrics[0].right.roundToInt()
            val baselineY = paragraph.lineMetrics[0].baseline.roundToInt()

            var notAllWhite = false
            for (x in (right - 5)until (right + 5)) {
                for (y in (baselineY - 5)until (baselineY + 5)) {
                    if (bitmap.getColor(x, y) != Color.WHITE) {
                        notAllWhite = true
                        break
                    }
                }
            }

            assertTrue(notAllWhite, "Expected some non-white pixels for a dot.")

            val rects = paragraph.getRectsForRange(0, 4, RectHeightMode.TIGHT, RectWidthMode.TIGHT)
            val tabsRectRight = rects[0].rect.right.roundToInt()
            assertTrue(tabsRectRight > paragraph.lineMetrics[0].left &&
                    tabsRectRight < paragraph.lineMetrics[0].right
            )
            var countNotWhite = 0
            for (x in 0 until tabsRectRight) {
                for (y in 0 until bitmap.height) {
                    if (bitmap.getColor(x, y) != Color.WHITE) {
                        countNotWhite++
                    }
                }
            }

            assertEquals(0, countNotWhite, "Expected all pixels for tabs to be white.")
        }
    }