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     // tdf#153853 The line number window does not need to be affected by RTL
  25     EnableRTL(false);
  26
  27     const Wallpaper aBackground(GetSettings().GetStyleSettings().GetWindowColor());
  28     SetBackground(aBackground);
  29     GetWindow(GetWindowType::Border)->SetBackground(aBackground);
  30     m_FontColor = GetSettings().GetStyleSettings().GetWindowTextColor();
  31     m_HighlightColor = GetSettings().GetStyleSettings().GetFaceColor();
  32     m_nBaseWidth = GetTextWidth(u"8"_ustr);
  33     m_nWidth = m_nBaseWidth * 3 + m_nBaseWidth / 2;
  34 }
  35
  36 LineNumberWindow::~LineNumberWindow() { disposeOnce(); }
  37
  38 void LineNumberWindow::dispose()
  39 {
  40     m_pModulWindow.clear();
  41     Window::dispose();
  42 }
  43
  44 void LineNumberWindow::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle&)
  45 {
  46     if (SyncYOffset())
  47         return;
  48
  49     ExtTextEngine* txtEngine = m_pModulWindow->GetEditEngine();
  50     if (!txtEngine)
  51         return;
  52
  53     TextView* txtView = m_pModulWindow->GetEditView();
  54     if (!txtView)
  55         return;
  56
  57     int windowHeight = rRenderContext.GetOutputSize().Height();
  58     int windowWidth = rRenderContext.GetOutputSize().Width();
  59     int nLineHeight = rRenderContext.GetTextHeight();
  60     if (!nLineHeight)
  61     {
  62         return;
  63     }
  64
  65     int startY = txtView->GetStartDocPos().Y();
  66     const sal_uInt32 nStartLine = startY / nLineHeight + 1;
  67     sal_uInt32 nEndLine = (startY + windowHeight) / nLineHeight + 1;
  68
  69     if (txtEngine->GetParagraphCount() + 1 < nEndLine)
  70         nEndLine = txtEngine->GetParagraphCount() + 1;
  71
  72     // FIXME: it would be best if we could get notified of a font change
  73     // rather than doing that re-calculation at each Paint event
  74     m_nBaseWidth = GetTextWidth(u"8"_ustr);
  75
  76     // reserve enough for 3 digit minimum, with a bit to spare for comfort
  77     m_nWidth = m_nBaseWidth * 3 + m_nBaseWidth / 2;
  78     auto nMaxLineNumber = std::max(nEndLine, txtEngine->GetParagraphCount() + 1);
  79     sal_uInt32 i = (nMaxLineNumber + 1) / 1000;
  80     while (i)
  81     {
  82         i /= 10;
  83         m_nWidth += m_nBaseWidth;
  84     }
  85
  86     vcl::Font aNormalFont = rRenderContext.GetFont();
  87     vcl::Font aBoldFont(aNormalFont);
  88     aBoldFont.SetWeight(FontWeight::WEIGHT_BOLD);
  89
  90     sal_uInt32 nParaEnd = txtView->GetSelection().GetEnd().GetPara() + 1;
  91     sal_Int64 y = (nStartLine - 1) * static_cast<sal_Int64>(nLineHeight);
  92
  93     for (sal_uInt32 n = nStartLine; n <= nEndLine; ++n, y += nLineHeight)
  94     {
  95         // Font weight for the selected lines is bold
  96         if (n == nParaEnd)
  97         {
  98             tools::Rectangle aRect(Point(0, y - m_nCurYOffset),
  99                                    Point(windowWidth, y - m_nCurYOffset + nLineHeight));
 100             rRenderContext.SetFillColor(m_HighlightColor);
 101             rRenderContext.DrawRect(aRect);
 102             rRenderContext.SetFont(aBoldFont);
 103         }
 104         else
 105         {
 106             rRenderContext.SetFont(aNormalFont);
 107         }
 108
 109         rRenderContext.SetTextColor(m_FontColor);
 110         const OUString aLineNumber = OUString::number(n);
 111         // tdf#153798 - align line numbers to the right
 112         rRenderContext.DrawText(
 113             Point(m_nWidth - GetTextWidth(aLineNumber) - m_nBaseWidth / 2, y - m_nCurYOffset),
 114             aLineNumber);
 115     }
 116     // Restore the original font
 117     rRenderContext.SetFont(aNormalFont);
 118
 119     // Resize the parent after calculating the new width and height values
 120     GetParent()->Resize();
 121 }
 122
 123 void LineNumberWindow::DataChanged(DataChangedEvent const& rDCEvt)
 124 {
 125     Window::DataChanged(rDCEvt);
 126     if (rDCEvt.GetType() == DataChangedEventType::SETTINGS
 127         && (rDCEvt.GetFlags() & AllSettingsFlags::STYLE))
 128     {
 129         Color aColor(GetSettings().GetStyleSettings().GetFieldColor());
 130         const AllSettings* pOldSettings = rDCEvt.GetOldSettings();
 131         if (!pOldSettings || aColor != pOldSettings->GetStyleSettings().GetFieldColor())
 132         {
 133             SetBackground(Wallpaper(aColor));
 134             Invalidate();
 135         }
 136     }
 137 }
 138
 139 void LineNumberWindow::DoScroll(tools::Long nVertScroll)
 140 {
 141     m_nCurYOffset -= nVertScroll;
 142     Window::Scroll(0, nVertScroll);
 143 }
 144
 145 bool LineNumberWindow::SyncYOffset()
 146 {
 147     TextView* pView = m_pModulWindow->GetEditView();
 148     if (!pView)
 149         return false;
 150
 151     tools::Long nViewYOffset = pView->GetStartDocPos().Y();
 152     if (m_nCurYOffset == nViewYOffset)
 153         return false;
 154
 155     m_nCurYOffset = nViewYOffset;
 156     Invalidate();
 157     return true;
 158 }
 159
 160 } // namespace basctl
 161
 162 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */