sfx2/source/view/lokstarmathhelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   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 <sal/config.h>
  11
  12 #include <sfx2/ipclient.hxx>
  13 #include <sfx2/lokcomponenthelpers.hxx>
  14 #include <sfx2/lokhelper.hxx>
  15 #include <sfx2/objsh.hxx>
  16
  17 #include <comphelper/dispatchcommand.hxx>
  18 #include <comphelper/lok.hxx>
  19 #include <toolkit/helper/vclunohelper.hxx>
  20 #include <tools/fract.hxx>
  21 #include <tools/UnitConversion.hxx>
  22 #include <vcl/layout.hxx>
  23 #include <vcl/virdev.hxx>
  24 #include <vcl/window.hxx>
  25
  26 #include <com/sun/star/embed/XEmbeddedObject.hpp>
  27 #include <com/sun/star/frame/XModel.hpp>
  28 #include <com/sun/star/lang/XServiceInfo.hpp>
  29
  30 LokStarMathHelper::LokStarMathHelper(const SfxViewShell* pViewShell)
  31     : mpViewShell(pViewShell)
  32 {
  33     if (mpViewShell)
  34     {
  35         if (const SfxInPlaceClient* pIPClient = mpViewShell->GetIPClient())
  36         {
  37             if (const auto& xEmbObj = pIPClient->GetObject())
  38             {
  39                 css::uno::Reference<css::lang::XServiceInfo> xComp(xEmbObj->getComponent(),
  40                                                                    css::uno::UNO_QUERY);
  41                 if (xComp && xComp->supportsService(u"com.sun.star.formula.FormulaProperties"_ustr))
  42                 {
  43                     if (css::uno::Reference<css::frame::XModel> xModel{ xComp,
  44                                                                         css::uno::UNO_QUERY })
  45                     {
  46                         if (auto xController = xModel->getCurrentController())
  47                         {
  48                             mpIPClient = pIPClient;
  49                             mxFrame = xController->getFrame();
  50                         }
  51                     }
  52                 }
  53             }
  54         }
  55     }
  56 }
  57
  58 void LokStarMathHelper::Dispatch(
  59     const OUString& cmd, const css::uno::Sequence<css::beans::PropertyValue>& rArguments) const
  60 {
  61     if (mxFrame)
  62         comphelper::dispatchCommand(cmd, mxFrame, rArguments);
  63 }
  64
  65 namespace
  66 {
  67 // Find a child SmGraphicWindow*
  68 vcl::Window* FindSmGraphicWindow(vcl::Window* pWin)
  69 {
  70     if (!pWin)
  71         return nullptr;
  72
  73     if (pWin->IsStarMath())
  74         return pWin;
  75
  76     pWin = pWin->GetWindow(GetWindowType::FirstChild);
  77     while (pWin)
  78     {
  79         if (vcl::Window* pSmGraphicWindow = FindSmGraphicWindow(pWin))
  80             return pSmGraphicWindow;
  81         pWin = pWin->GetWindow(GetWindowType::Next);
  82     }
  83     return nullptr;
  84 }
  85
  86 // Find a child window that corresponds to SmGraphicWidget
  87 vcl::Window* FindChildSmGraphicWidgetWindow(vcl::Window* pWin)
  88 {
  89     if (!pWin)
  90         return nullptr;
  91
  92     // The needed window is a VclDrawingArea
  93     if (dynamic_cast<VclDrawingArea*>(pWin))
  94         return pWin;
  95
  96     pWin = pWin->GetWindow(GetWindowType::FirstChild);
  97     while (pWin)
  98     {
  99         if (vcl::Window* pSmGraphicWidgetWindow = FindChildSmGraphicWidgetWindow(pWin))
 100             return pSmGraphicWidgetWindow;
 101         pWin = pWin->GetWindow(GetWindowType::Next);
 102     }
 103     return nullptr;
 104 }
 105 }
 106
 107 vcl::Window* LokStarMathHelper::GetGraphicWindow()
 108 {
 109     if (!mpGraphicWindow)
 110     {
 111         if (mxFrame)
 112         {
 113             css::uno::Reference<css::awt::XWindow> xDockerWin = mxFrame->getContainerWindow();
 114             mpGraphicWindow.set(FindSmGraphicWindow(VCLUnoHelper::GetWindow(xDockerWin)));
 115         }
 116     }
 117
 118     return mpGraphicWindow.get();
 119 }
 120
 121 vcl::Window* LokStarMathHelper::GetWidgetWindow()
 122 {
 123     if (!mpWidgetWindow)
 124         mpWidgetWindow.set(FindChildSmGraphicWidgetWindow(GetGraphicWindow()));
 125
 126     return mpWidgetWindow.get();
 127 }
 128
 129 const SfxViewShell* LokStarMathHelper::GetSmViewShell()
 130 {
 131     if (vcl::Window* pGraphWindow = GetGraphicWindow())
 132     {
 133         return SfxViewShell::GetFirst(false, [pGraphWindow](const SfxViewShell& shell) {
 134             return shell.GetWindow() && shell.GetWindow()->IsChild(pGraphWindow);
 135         });
 136     }
 137     return nullptr;
 138 }
 139
 140 tools::Rectangle LokStarMathHelper::GetBoundingBox() const
 141 {
 142     if (mpIPClient)
 143     {
 144         tools::Rectangle r(mpIPClient->GetObjArea());
 145         if (SfxObjectShell* pObjShell = const_cast<SfxViewShell*>(mpViewShell)->GetObjectShell())
 146         {
 147             const o3tl::Length unit = MapToO3tlLength(pObjShell->GetMapUnit());
 148             if (unit != o3tl::Length::twip && unit != o3tl::Length::invalid)
 149                 r = o3tl::convert(r, unit, o3tl::Length::twip);
 150         }
 151         return r;
 152     }
 153     return {};
 154 }
 155
 156 bool LokStarMathHelper::postMouseEvent(int nType, int nX, int nY, int nCount, int nButtons,
 157                                        int nModifier, double fPPTScaleX, double fPPTScaleY)
 158 {
 159     const tools::Rectangle rBBox = GetBoundingBox();
 160     if (Point aMousePos(nX, nY); rBBox.Contains(aMousePos))
 161     {
 162         if (vcl::Window* pWindow = GetWidgetWindow())
 163         {
 164             aMousePos -= rBBox.TopLeft();
 165
 166             // In lok, Math does not convert coordinates (see SmGraphicWidget::SetDrawingArea,
 167             // which disables MapMode), and uses twips internally (see SmDocShell ctor and
 168             // SmMapUnit), but the conversion factor can depend on the client zoom.
 169             // 1. Remove the twip->pixel factor in the passed scales
 170             double fScaleX = o3tl::convert(fPPTScaleX, o3tl::Length::px, o3tl::Length::twip);
 171             double fScaleY = o3tl::convert(fPPTScaleY, o3tl::Length::px, o3tl::Length::twip);
 172             // 2. Adjust the position according to the scales
 173             aMousePos
 174                 = Point(std::round(aMousePos.X() * fScaleX), std::round(aMousePos.Y() * fScaleY));
 175             // 3. Take window own scaling into account (reverses the conversion done in
 176             // SmGraphicWidget::MouseButtonDown, albeit incompletely - it does not handle
 177             // GetFormulaDrawPos; hopefully, in lok/in-place case, it's always [ 0, 0 ]?)
 178             aMousePos = pWindow->LogicToPixel(aMousePos);
 179
 180             LokMouseEventData aMouseEventData(
 181                 nType, aMousePos, nCount, MouseEventModifiers::SIMPLECLICK, nButtons, nModifier);
 182             SfxLokHelper::postMouseEventAsync(pWindow, aMouseEventData);
 183
 184             return true;
 185         }
 186     }
 187     return false;
 188 }
 189
 190 void LokStarMathHelper::PaintTile(VirtualDevice& rDevice, const tools::Rectangle& rTileRect)
 191 {
 192     const tools::Rectangle aMathRect = GetBoundingBox();
 193     if (rTileRect.GetIntersection(aMathRect).IsEmpty())
 194         return;
 195
 196     vcl::Window* pWidgetWindow = GetWidgetWindow();
 197     if (!pWidgetWindow)
 198         return;
 199
 200     Point aOffset(aMathRect.Left() - rTileRect.Left(), aMathRect.Top() - rTileRect.Top());
 201
 202     MapMode newMode = rDevice.GetMapMode();
 203     newMode.SetOrigin(aOffset);
 204     rDevice.SetMapMode(newMode); // Push/Pop is done in PaintAllInPlaceOnTile
 205
 206     pWidgetWindow->Paint(rDevice, {}); // SmGraphicWidget::Paint does not use the passed rectangle
 207 }
 208
 209 void LokStarMathHelper::PaintAllInPlaceOnTile(VirtualDevice& rDevice, int nOutputWidth,
 210                                               int nOutputHeight, int nTilePosX, int nTilePosY,
 211                                               tools::Long nTileWidth, tools::Long nTileHeight)
 212 {
 213     if (comphelper::LibreOfficeKit::isTiledAnnotations())
 214         return;
 215
 216     SfxViewShell* pCurView = SfxViewShell::Current();
 217     if (!pCurView)
 218         return;
 219     const ViewShellDocId nDocId = pCurView->GetDocId();
 220     const int nPartForCurView = pCurView->getPart();
 221
 222     // Resizes the virtual device to contain the entries context
 223     rDevice.SetOutputSizePixel({ nOutputWidth, nOutputHeight });
 224
 225     rDevice.Push(vcl::PushFlags::MAPMODE);
 226     MapMode aMapMode(rDevice.GetMapMode());
 227
 228     // Scaling. Must convert from pixels to twips. We know that VirtualDevices use a DPI of 96.
 229     const Fraction scale = conversionFract(o3tl::Length::px, o3tl::Length::twip);
 230     const Fraction scaleX = Fraction(nOutputWidth, nTileWidth) * scale;
 231     const Fraction scaleY = Fraction(nOutputHeight, nTileHeight) * scale;
 232     aMapMode.SetScaleX(scaleX);
 233     aMapMode.SetScaleY(scaleY);
 234     aMapMode.SetMapUnit(MapUnit::MapTwip);
 235     rDevice.SetMapMode(aMapMode);
 236
 237     const tools::Rectangle aTileRect(Point(nTilePosX, nTilePosY), Size(nTileWidth, nTileHeight));
 238
 239     for (SfxViewShell* pViewShell = SfxViewShell::GetFirst(); pViewShell;
 240          pViewShell = SfxViewShell::GetNext(*pViewShell))
 241         if (pViewShell->GetDocId() == nDocId && pViewShell->getPart() == nPartForCurView)
 242             LokStarMathHelper(pViewShell).PaintTile(rDevice, aTileRect);
 243
 244     rDevice.Pop();
 245 }
 246
 247 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */