The basic viewcsv program works, it uses ncurses to display a csv file in a

tabular way, like a spreadsheet, only raw.  It displays exactly what libbu++
reads from the csv file.

1 files changed, 187 insertions, 2 deletions

diff --git a/src/tools/viewcsv.cpp b/src/tools/viewcsv.cpp
index 69bc6a1..429c099 100644
--- a/src/tools/viewcsv.cpp
+++ b/src/tools/viewcsv.cpp
@@ -2,6 +2,8 @@
 #include <bu/optparser.h>
 #include <bu/csvreader.h>
 #include <bu/file.h>
+#include <bu/util.h>
+#include <ncurses.h>
 
 using namespace Bu;
 
@@ -65,6 +67,137 @@ public:
         IntArray aWidths;
 };
 
+class CsvView
+{
+public:
+        CsvView( CsvDoc &doc ) :
+                doc( doc ),
+                iXOff( 0 ),
+                iYOff( 0 ),
+                bHeaderRow( false )
+        {
+        }
+
+        virtual ~CsvView()
+        {
+        }
+
+        void render()
+        {
+                erase();
+                int maxx, maxy;
+                getmaxyx( stdscr, maxy, maxx );
+
+                int iRows = min( (int)doc.sgData.getSize(), maxy-1 );
+                int iCols = min( doc.iMaxCols, (int)maxx-1 );
+
+                int iHdrHeight = 1;
+                if( bHeaderRow )
+                        iHdrHeight++;
+
+                // Draw the headers
+                for( int iRow = 0; iRow < iRows; iRow++ )
+                {
+                        char buf[6];
+                        snprintf( buf, 6, "%5d", iRow+iYOff );
+                        mvaddnstr( iRow+iHdrHeight+1, 0, buf, 5 );
+                        mvaddch( iRow+iHdrHeight+1, 6, ACS_VLINE );
+                }
+                int iXPos = 6;
+                try
+                {
+                        for( int iCol = 0; iCol < iCols; iCol++ )
+                        {
+                                if( iXPos + doc.aWidths[iCol+iXOff]+2 >= maxx )
+                                        break;
+                                char buf[6];
+                                snprintf( buf, 6, "%d", iCol+iXOff );
+                                mvaddch( 0, iXPos, ACS_VLINE );
+                                mvaddch( iHdrHeight, iXPos, ACS_PLUS );
+                                mvaddnstr( 0, iXPos+1, buf, 5 );
+                                if( bHeaderRow )
+                                {
+                                        mvaddstr( 1, iXPos+1, doc.sgData[0][iCol+iXOff].getStr() );
+                                        mvaddch( 1, iXPos, ACS_VLINE );
+                                }
+                                for( int j = 0; j <= doc.aWidths[iCol+iXOff]; j++ )
+                                {
+                                        mvaddch( iHdrHeight, iXPos+j+1, ACS_HLINE );
+                                }
+                                iXPos += doc.aWidths[iCol+iXOff]+2;
+                        }
+                }
+                catch(...) { }
+
+                // Draw some data
+                for( int iRow = 0; iRow < iRows; iRow++ )
+                {
+                        try
+                        {
+                        int iXPos = 6;
+                        for( int iCol = 0; iCol < iCols; iCol++ )
+                        {
+                                if( iXPos + doc.aWidths[iCol+iXOff]+2 >= maxx )
+                                        break;
+                                mvaddch( iRow+iHdrHeight+1, iXPos, ACS_VLINE );
+                                mvaddstr( iRow+iHdrHeight+1, iXPos+1,
+                                                doc.sgData[iRow+iYOff][iCol+iXOff].getStr() );
+                                iXPos += doc.aWidths[iCol+iXOff]+2;
+                        }
+                        } catch(...) { }
+                }
+        }
+
+        void move( int iX, int iY )
+        {
+                iXOff += iX;
+                iYOff += iY;
+                if( iXOff < 0 )
+                        iXOff = 0;
+
+                if( bHeaderRow )
+                {
+                        if( iYOff < 1 )
+                                iYOff = 1;
+                }
+                else
+                {
+                        if( iYOff < 0 )
+                                iYOff = 0;
+                }
+        }
+
+        void pageDown()
+        {
+                int maxx, maxy;
+                getmaxyx( stdscr, maxy, maxx );
+                move( 0, maxy-2 );
+        }
+
+        void pageUp()
+        {
+                int maxx, maxy;
+                getmaxyx( stdscr, maxy, maxx );
+                move( 0, -(maxy-2) );
+        }
+
+        void setHeaderRow( bool bOn )
+        {
+                bHeaderRow = bOn;
+                move( 0, 0 );
+        }
+
+        void toggleHeaderRow()
+        {
+                setHeaderRow( !bHeaderRow );
+        }
+
+        CsvDoc &doc;
+        int iXOff;
+        int iYOff;
+        bool bHeaderRow;
+};
+
 int main( int argc, char *argv[] )
 {
         Options opt( argc, argv );
@@ -87,8 +220,60 @@ int main( int argc, char *argv[] )
                 doc.addRow( sa );
         }
 
-        sio << "Csv grid:  " << doc.iMaxCols << " x " << doc.sgData.getSize()
-                << sio.nl;
+        initscr();
+        cbreak();
+        noecho();
+        nonl();
+        intrflush( stdscr, FALSE );
+        keypad( stdscr, TRUE ); 
+        curs_set( 0 );
+
+        CsvView view( doc );
+        view.toggleHeaderRow();
+
+        bool bRun = true;
+        do
+        {
+                view.render();
+
+                int ch = getch();
+                switch( ch )
+                {
+                        case 'q':
+                                bRun = false;
+                                break;
+
+                        case KEY_DOWN:
+                                view.move( 0, 1 );
+                                break;
+
+                        case KEY_UP:
+                                view.move( 0, -1 );
+                                break;
+
+                        case KEY_LEFT:
+                                view.move( -1, 0 );
+                                break;
+
+                        case KEY_RIGHT:
+                                view.move( 1, 0 );
+                                break;
+
+                        case KEY_NPAGE:
+                                view.pageDown();
+                                break;
+
+                        case KEY_PPAGE:
+                                view.pageUp();
+                                break;
+
+                        case 'h':
+                                view.toggleHeaderRow();
+                                break;
+                }
+        } while( bRun );
+
+        endwin();
 
         return 0;
 }