From 3fefbb223500e7e9f05a75d939ff3f2550ecd821 Mon Sep 17 00:00:00 2001
From: Debao Zhang <hello@debao.me>
Date: Mon, 28 Oct 2013 10:08:09 +0800
Subject: [PATCH] Add worksheet dimenstion access API

first/last Row/Column
---
 src/xlsx/xlsxworksheet.cpp             | 62 +++++++++++++++++++++
 src/xlsx/xlsxworksheet.h               |  5 ++
 tests/auto/worksheet/tst_worksheet.cpp | 77 ++++++++++++++++++++++++++
 3 files changed, 144 insertions(+)

diff --git a/src/xlsx/xlsxworksheet.cpp b/src/xlsx/xlsxworksheet.cpp
index 063e5fe..a11c5f3 100755
--- a/src/xlsx/xlsxworksheet.cpp
+++ b/src/xlsx/xlsxworksheet.cpp
@@ -892,6 +892,68 @@ bool Worksheet::setColumn(int colFirst, int colLast, double width, Format *forma
     return true;
 }
 
+/*!
+ * Returns the first row in the sheet that contains a used cell.
+ */
+int Worksheet::firstRow() const
+{
+    Q_D(const Worksheet);
+
+    if (d->dim_rowmax == INT32_MIN) {
+        //Row dimenstion isn't set.
+        return 0;
+    } else {
+        return d->dim_rowmin;
+    }
+}
+
+/*!
+ * Returns the zero-based index of the row after the last row in
+ * the sheet that contains a used cell.
+ */
+int Worksheet::lastRow() const
+{
+    Q_D(const Worksheet);
+
+    if (d->dim_rowmax == INT32_MIN) {
+        //Row dimenstion isn't set.
+        return 0;
+    } else {
+        return d->dim_rowmax + 1;
+    }
+}
+
+/*!
+ * Returns the first column in the sheet that contains a used cell.
+ */
+int Worksheet::firstColumn() const
+{
+    Q_D(const Worksheet);
+
+    if (d->dim_colmax == INT32_MIN) {
+        //Col dimenstion isn't set.
+        return 0;
+    } else {
+        return d->dim_colmin;
+    }
+}
+
+/*!
+ * Returns the zero-based index of the column after the last column
+ * in the sheet that contains a used cell.
+ */
+int Worksheet::lastColumn() const
+{
+    Q_D(const Worksheet);
+
+    if (d->dim_colmax == INT32_MIN) {
+        //Col dimenstion isn't set.
+        return 0;
+    } else {
+        return d->dim_colmax + 1;
+    }
+}
+
 Drawing *Worksheet::drawing() const
 {
     Q_D(const Worksheet);
diff --git a/src/xlsx/xlsxworksheet.h b/src/xlsx/xlsxworksheet.h
index 5fac3c9..8be1a19 100755
--- a/src/xlsx/xlsxworksheet.h
+++ b/src/xlsx/xlsxworksheet.h
@@ -74,6 +74,11 @@ public:
     bool setRow(int row, double height, Format* format=0, bool hidden=false);
     bool setColumn(int colFirst, int colLast, double width, Format* format=0, bool hidden=false);
 
+    int firstRow() const;
+    int lastRow() const;
+    int firstColumn() const;
+    int lastColumn() const;
+
     void setRightToLeft(bool enable);
     void setZeroValuesHidden(bool enable);
 
diff --git a/tests/auto/worksheet/tst_worksheet.cpp b/tests/auto/worksheet/tst_worksheet.cpp
index 3d7e927..58b78c1 100644
--- a/tests/auto/worksheet/tst_worksheet.cpp
+++ b/tests/auto/worksheet/tst_worksheet.cpp
@@ -17,6 +17,11 @@ public:
 private Q_SLOTS:
     void testEmptySheet();
 
+    void testFirstRow();
+    void testLastRow();
+    void testFirstColumn();
+    void testLastColumn();
+
     void testWriteCells();
     void testWriteHyperlinks();
     void testMerge();
@@ -41,6 +46,78 @@ void WorksheetTest::testEmptySheet()
     QVERIFY2(!xmldata.contains("<mergeCell"), "");
 }
 
+void WorksheetTest::testFirstRow()
+{
+    QXlsx::Worksheet sheet("", 1, 0);
+    QCOMPARE(sheet.firstRow(), 0); //Default
+
+    sheet.write(10000, 10000, "For test");
+    QCOMPARE(sheet.firstRow(), 10000);
+
+    sheet.write("C3", "Test");
+    QCOMPARE(sheet.firstRow(), 2); //Single Cell
+
+    sheet.write("B2", "Second");
+    QCOMPARE(sheet.firstRow(), 1);
+
+    sheet.write("D4", "Test");
+    QCOMPARE(sheet.firstRow(), 1);
+}
+
+void WorksheetTest::testLastRow()
+{
+    QXlsx::Worksheet sheet("", 1, 0);
+    QCOMPARE(sheet.lastRow(), 0); //Default
+
+    sheet.write("C3", "Test");
+    QCOMPARE(sheet.lastRow(), 3); //Single Cell
+
+    sheet.write("B2", "Second");
+    QCOMPARE(sheet.lastRow(), 3);
+
+    sheet.write("D4", "Test");
+    QCOMPARE(sheet.lastRow(), 4);
+
+    sheet.write(10000, 10000, "For test");
+    QCOMPARE(sheet.lastRow(), 10001);
+}
+
+void WorksheetTest::testFirstColumn()
+{
+    QXlsx::Worksheet sheet("", 1, 0);
+    QCOMPARE(sheet.firstColumn(), 0); //Default
+
+    sheet.write(10000, 10000, "For test");
+    QCOMPARE(sheet.firstColumn(), 10000);
+
+    sheet.write("C3", "Test");
+    QCOMPARE(sheet.firstColumn(), 2); //Single Cell
+
+    sheet.write("B2", "Second");
+    QCOMPARE(sheet.firstColumn(), 1);
+
+    sheet.write("D4", "Test");
+    QCOMPARE(sheet.firstColumn(), 1);
+}
+
+void WorksheetTest::testLastColumn()
+{
+    QXlsx::Worksheet sheet("", 1, 0);
+    QCOMPARE(sheet.lastColumn(), 0); //Default
+
+    sheet.write("C3", "Test");
+    QCOMPARE(sheet.lastColumn(), 3); //Single Cell
+
+    sheet.write("B2", "Second");
+    QCOMPARE(sheet.lastColumn(), 3);
+
+    sheet.write("D4", "Test");
+    QCOMPARE(sheet.lastColumn(), 4);
+
+    sheet.write(10000, 10000, "For test");
+    QCOMPARE(sheet.lastColumn(), 10001);
+}
+
 void WorksheetTest::testWriteCells()
 {
     QXlsx::Worksheet sheet("", 1, 0);