basctl/source/basicide/linenumberwindow.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include "baside2.hxx"
  11
  12 #include <vcl/xtextedt.hxx>
  13 #include <vcl/settings.hxx>
  14
  15 namespace basctl
  16 {
  17
  18 LineNumberWindow::LineNumberWindow (vcl::Window* pParent, ModulWindow* pModulWindow) :
  19     Window(pParent, WB_BORDER),
  20     m_pModulWindow(pModulWindow),
  21     m_nCurYOffset(0)
  22 {
  23     SetBackground(Wallpaper(GetSettings().GetStyleSettings().GetFieldColor()));
  24     m_nBaseWidth = GetTextWidth("8");
  25     m_nWidth = m_nBaseWidth * 3 + m_nBaseWidth / 2;
  26 }
  27
  28 LineNumberWindow::~LineNumberWindow()
  29 {
  30     disposeOnce();
  31 }
  32
  33 void LineNumberWindow::dispose()
  34 {
  35     m_pModulWindow.clear();
  36     Window::dispose();
  37 }
  38
  39 void LineNumberWindow::Paint( vcl::RenderContext& rRenderContext, const tools::Rectangle&)
  40 {
  41     if(SyncYOffset())
  42         return;
  43
  44     ExtTextEngine* txtEngine = m_pModulWindow->GetEditEngine();
  45     if (!txtEngine)
  46         return;
  47
  48     TextView* txtView = m_pModulWindow->GetEditView();
  49     if (!txtView)
  50         return;
  51
  52     GetParent()->Resize();
  53
  54     int windowHeight = rRenderContext.GetOutputSize().Height();
  55     int nLineHeight = rRenderContext.GetTextHeight();
  56     if (!nLineHeight)
  57     {
  58         return;
  59     }
  60
  61     int startY = txtView->GetStartDocPos().Y();
  62     const sal_uInt32 nStartLine = startY / nLineHeight + 1;
  63     sal_uInt32 nEndLine = (startY + windowHeight) / nLineHeight + 1;
  64
  65     if (txtEngine->GetParagraphCount() + 1 < nEndLine)
  66         nEndLine = txtEngine->GetParagraphCount() + 1;
  67
  68     // FIXME: it would be best if we could get notified of a font change
  69     // rather than doing that re-calculation at each Paint event
  70     m_nBaseWidth = GetTextWidth("8");
  71
  72     // reserve enough for 3 digit minimum, with a bit to spare for comfort
  73     m_nWidth = m_nBaseWidth * 3 + m_nBaseWidth / 2;
  74     sal_uInt32 i = (nEndLine + 1) / 1000;
  75     while (i)
  76     {
  77         i /= 10;
  78         m_nWidth += m_nBaseWidth;
  79     }
  80
  81     sal_Int64 y = (nStartLine - 1) * static_cast<sal_Int64>(nLineHeight);
  82     for (sal_uInt32 n = nStartLine; n <= nEndLine; ++n, y += nLineHeight)
  83         rRenderContext.DrawText(Point(0, y - m_nCurYOffset), OUString::number(n));
  84 }
  85
  86 void LineNumberWindow::DataChanged(DataChangedEvent const & rDCEvt)
  87 {
  88     Window::DataChanged(rDCEvt);
  89     if (rDCEvt.GetType() == DataChangedEventType::SETTINGS
  90         && (rDCEvt.GetFlags() & AllSettingsFlags::STYLE))
  91     {
  92         Color aColor(GetSettings().GetStyleSettings().GetFieldColor());
  93         const AllSettings* pOldSettings = rDCEvt.GetOldSettings();
  94         if (!pOldSettings || aColor != pOldSettings->GetStyleSettings().GetFieldColor())
  95         {
  96             SetBackground(Wallpaper(aColor));
  97             Invalidate();
  98         }
  99     }
 100 }
 101
 102 void LineNumberWindow::DoScroll(long nVertScroll)
 103 {
 104     m_nCurYOffset -= nVertScroll;
 105     Window::Scroll(0, nVertScroll);
 106 }
 107
 108
 109 bool LineNumberWindow::SyncYOffset()
 110 {
 111     TextView* pView = m_pModulWindow->GetEditView();
 112     if (!pView)
 113         return false;
 114
 115     long nViewYOffset = pView->GetStartDocPos().Y();
 116     if (m_nCurYOffset == nViewYOffset)
 117         return false;
 118
 119     m_nCurYOffset = nViewYOffset;
 120     Invalidate();
 121     return true;
 122 }
 123
 124
 125 } // namespace basctl
 126
 127 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */