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/event.hxx>
  13 #include <vcl/textview.hxx>
  14 #include <vcl/xtextedt.hxx>
  15 #include <vcl/settings.hxx>
  16
  17 namespace basctl
  18 {
  19 LineNumberWindow::LineNumberWindow(vcl::Window* pParent, ModulWindow* pModulWindow)
  20     : Window(pParent, WB_BORDER)
  21     , m_pModulWindow(pModulWindow)
  22     , m_nCurYOffset(0)
  23 {
  24     const Wallpaper aBackground(GetSettings().GetStyleSettings().GetWindowColor());
  25     SetBackground(aBackground);
  26     GetWindow(GetWindowType::Border)->SetBackground(aBackground);
  27     m_FontColor = GetSettings().GetStyleSettings().GetWindowTextColor();
  28     m_nBaseWidth = GetTextWidth("8");
  29     m_nWidth = m_nBaseWidth * 3 + m_nBaseWidth / 2;
  30 }
  31
  32 LineNumberWindow::~LineNumberWindow() { disposeOnce(); }
  33
  34 void LineNumberWindow::dispose()
  35 {
  36     m_pModulWindow.clear();
  37     Window::dispose();
  38 }
  39
  40 void LineNumberWindow::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle&)
  41 {
  42     if (SyncYOffset())
  43         return;
  44
  45     ExtTextEngine* txtEngine = m_pModulWindow->GetEditEngine();
  46     if (!txtEngine)
  47         return;
  48
  49     TextView* txtView = m_pModulWindow->GetEditView();
  50     if (!txtView)
  51         return;
  52
  53     int windowHeight = rRenderContext.GetOutputSize().Height();
  54     int nLineHeight = rRenderContext.GetTextHeight();
  55     if (!nLineHeight)
  56     {
  57         return;
  58     }
  59
  60     int startY = txtView->GetStartDocPos().Y();
  61     const sal_uInt32 nStartLine = startY / nLineHeight + 1;
  62     sal_uInt32 nEndLine = (startY + windowHeight) / nLineHeight + 1;
  63
  64     if (txtEngine->GetParagraphCount() + 1 < nEndLine)
  65         nEndLine = txtEngine->GetParagraphCount() + 1;
  66
  67     // FIXME: it would be best if we could get notified of a font change
  68     // rather than doing that re-calculation at each Paint event
  69     m_nBaseWidth = GetTextWidth("8");
  70
  71     // reserve enough for 3 digit minimum, with a bit to spare for comfort
  72     m_nWidth = m_nBaseWidth * 3 + m_nBaseWidth / 2;
  73     auto nMaxLineNumber = std::max(nEndLine, txtEngine->GetParagraphCount() + 1);
  74     sal_uInt32 i = (nMaxLineNumber + 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     rRenderContext.SetTextColor(m_FontColor);
  83     for (sal_uInt32 n = nStartLine; n <= nEndLine; ++n, y += nLineHeight)
  84     {
  85         const OUString aLineNumber = OUString::number(n);
  86         // tdf#153798 - align line numbers to the right
  87         rRenderContext.DrawText(
  88             Point(m_nWidth - GetTextWidth(aLineNumber) - m_nBaseWidth / 2, y - m_nCurYOffset),
  89             aLineNumber);
  90     }
  91
  92     // Resize the parent after calculating the new width and height values
  93     GetParent()->Resize();
  94 }
  95
  96 void LineNumberWindow::DataChanged(DataChangedEvent const& rDCEvt)
  97 {
  98     Window::DataChanged(rDCEvt);
  99     if (rDCEvt.GetType() == DataChangedEventType::SETTINGS
 100         && (rDCEvt.GetFlags() & AllSettingsFlags::STYLE))
 101     {
 102         Color aColor(GetSettings().GetStyleSettings().GetFieldColor());
 103         const AllSettings* pOldSettings = rDCEvt.GetOldSettings();
 104         if (!pOldSettings || aColor != pOldSettings->GetStyleSettings().GetFieldColor())
 105         {
 106             SetBackground(Wallpaper(aColor));
 107             Invalidate();
 108         }
 109     }
 110 }
 111
 112 void LineNumberWindow::DoScroll(tools::Long nVertScroll)
 113 {
 114     m_nCurYOffset -= nVertScroll;
 115     Window::Scroll(0, nVertScroll);
 116 }
 117
 118 bool LineNumberWindow::SyncYOffset()
 119 {
 120     TextView* pView = m_pModulWindow->GetEditView();
 121     if (!pView)
 122         return false;
 123
 124     tools::Long nViewYOffset = pView->GetStartDocPos().Y();
 125     if (m_nCurYOffset == nViewYOffset)
 126         return false;
 127
 128     m_nCurYOffset = nViewYOffset;
 129     Invalidate();
 130     return true;
 131 }
 132
 133 } // namespace basctl
 134
 135 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */