fix: #1 - text blocks by words

app/src/main/java/agzam/vyatsu/data/remote/pdf/Pdf2Table.kt

@@ -38,7 +38,7 @@ class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
 
     private val svgBuilder = StringBuilder()
     private val currentPath = StringBuilder()
-    private val tableSvg = StringBuilder()
+    val tableSvg = StringBuilder()
 
 
     private val currentSubPathLines = mutableListOf<PdfLine>()
@@ -52,7 +52,7 @@ class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
         val width = mediaBox.width
         val height = mediaBox.height
         return """
-            <svg width="$width" height="$height" viewBox="0 0 $width $height" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+            <svg width="$width" height="$height" viewBox="0 0 $width $height" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" style='font-size: 50%;'>
                 <g>${svgBuilder}</g>
                 <g>${tableSvg}</g>
             </svg>
@@ -211,7 +211,7 @@ class Pdf2Table(page: PDPage) : PDFGraphicsStreamEngine(page) {
                 val bottom = ys[ii+1]
                 cells.add(TableCell(left, top, right-left, bottom-top))
 
-                tableSvg.append("<rect fill='${if (i % 2 == 0) "#f" else "#0"}${if (ii % 2 == 0) "f0" else "00"}' x='$left' y='$top' width='${right-left}' height='${bottom-top}'/>\n")
+                tableSvg.append("<rect fill='${if (i % 2 == 0) "#ff" else "#9e"}${if (ii % 2 == 0) "ff9e" else "9e9e"}' x='$left' y='$top' width='${right-left}' height='${bottom-top}'/>\n")
             }
             columns.add(TableColumn(left, right-left, cells))
         }

app/src/main/java/agzam/vyatsu/data/remote/pdf/PdfScheduleParser.kt

@@ -52,12 +52,6 @@ object PdfScheduleParser {
                 svg.processPage(page)
                 val cols = svg.asTable()
 
-                /** Вывод таблички из PDF в SVG формате + отладочные жлементы из [Pdf2Table.asTable] **/
-                Log.v(SVG_TAG,  "====")
-                for(line in  svg.asSvg().split("\n")) {
-                    Log.v(SVG_TAG,  line)
-                }
-
                 if(cols.size != 3) throw RuntimeException("Found columns: ${cols.size}/3")
 
                 // Парсинг текста
@@ -67,6 +61,11 @@ object PdfScheduleParser {
                 textStripper.getText(doc)
                 val texts = textStripper.blocks
 
+                for(text in texts) {
+                    svg.tableSvg.appendLine("<text x='${text.x}' y='${text.y}'>${text.text}</text>")
+                    svg.tableSvg.appendLine("<circle cx='${text.x}' cy='${text.y}' r='1' fill='red'/>")
+                }
+
                 val daysColumn      = cols[0] // Колонка "День", имеет формат "<день> dd.mm.yy"
                 val intervalsColumn = cols[1] // Колонка "Интервал", имеет формат "HH:mm-HH:mm"
                 val lessonsColumn   = cols[2] // Колонка с инофрмацией о паре
@@ -114,7 +113,10 @@ object PdfScheduleParser {
                         group = content(groupCell)
                         continue
                     }
-                    if(day.size != 2) continue // XXX: добавить защиту от заголовка и выбрасывать исключения вместо пропуска?
+                    if(day.size != 2) {
+                        Log.w(TAG, "Day data is not in format <day> <date>: $day")
+                        continue // XXX: добавить защиту от заголовка и выбрасывать исключения вместо пропуска?
+                    }
 
                     val date = dateFrom(day[1]) ?: continue
                     val intervals = mutableListOf<TimeSlot>()
@@ -161,7 +163,7 @@ object PdfScheduleParser {
                                 val type = LessonType.fromRaw(typeMatch.first().value.trim())
                                 val teacher = raw.substring(typeMatch.last().range.last+1, raw.length - room.length).trim()
                                 var subgroup: String? = null
-                                Log.d(TAG, subject + " " + group)
+                                Log.d(TAG, "$subject $group")
                                 if(group != null && subject.startsWith("$group,")) {
                                     subject = subject.substring(group.length + 1).trim()
                                     val subgroupMatch = SUBGROUP_REGEX.find(subject)
@@ -192,6 +194,18 @@ object PdfScheduleParser {
                 for (text in texts.filter { it.rotation != 0f }) {
                     Log.v(TAG, "${text.x.roundToInt()}\t${text.y.roundToInt()}\t${text.text}")
                 }
+
+                /** Вывод таблички из PDF в SVG формате + отладочные жлементы из [Pdf2Table.asTable] **/
+                Log.v(SVG_TAG,  "====")
+                for(line in  svg.asSvg().split("\n")) {
+                    if(line.length > 250) {
+                        Log.v(SVG_TAG, "length: " + line.length)
+                        Log.v(SVG_TAG + "-" + (pageIndex+1),  "length: " + line.length)
+                        continue
+                    }
+                    Log.v(SVG_TAG,  line)
+                    Log.v(SVG_TAG + "-" + (pageIndex+1),  line)
+                }
             }
         } catch (e: Exception) {
             Log.e(TAG, "Parsing error", e)

app/src/main/java/agzam/vyatsu/data/remote/pdf/PdfTextParser.kt

@@ -7,6 +7,7 @@ import com.tom_roush.pdfbox.text.TextPosition
  * Парсер блоков текста из PDF
  * @author Agzam
  */
+
 class PdfTextParser : PDFTextStripper() {
 
     data class TextBlock(
@@ -25,21 +26,51 @@ class PdfTextParser : PDFTextStripper() {
     }
 
     override fun writeString(string: String?, textPositions: MutableList<TextPosition>?) {
-        if (!string.isNullOrBlank() && !textPositions.isNullOrEmpty()) {
+        if (textPositions.isNullOrEmpty()) return
-            val first = textPositions.first()
-            val last = textPositions.last()
 
-            val matrix = first.textMatrix
+        val currentWordChars = mutableListOf<TextPosition>()
-            val rotation = first.dir
 
-            val totalWidth = (last.xDirAdj + last.widthDirAdj) - first.xDirAdj
+        for (tp in textPositions) {
+            val unicode = tp.unicode
 
-            val x = matrix.translateX
+            if (unicode == " " || unicode == "\u00A0" || unicode == "\t") {
-            val y = matrix.translateY - first.heightDir
+                addWordBlock(currentWordChars)
-
+                currentWordChars.clear()
-            val height = first.heightDir
+            } else {
-
+                currentWordChars.add(tp)
-            blocks.add(TextBlock(string.trim(), x, currentPage.mediaBox.height - y - height, totalWidth, height, rotation))
+            }
         }
+
+        addWordBlock(currentWordChars)
+    }
+
+    private fun addWordBlock(wordChars: List<TextPosition>) {
+        if (wordChars.isEmpty()) return
+
+        val first = wordChars.first()
+        val last = wordChars.last()
+
+        val wordText = wordChars.joinToString("") { it.unicode }.trim()
+        if (wordText.isEmpty()) return
+
+        val matrix = first.textMatrix
+        val rotation = first.dir
+
+        val totalWidth = (last.xDirAdj + last.widthDirAdj) - first.xDirAdj
+
+        val x = matrix.translateX
+        val y = matrix.translateY - first.heightDir
+        val height = first.heightDir
+
+        blocks.add(
+            TextBlock(
+                text = wordText,
+                x = x,
+                y = currentPage.mediaBox.height - y - height,
+                width = totalWidth,
+                height = height,
+                rotation = rotation
+            )
+        )
     }
 }