Move xfa/fwl/core to xfa/fwl.

The core/ directory in FWL no-longer provides any context. This Cl moves all
of the core/ files up to the fwl/ folder.

As well, the CFWL_EvtFoo files are renamed CFWL_EventFoo and the CFWL_MsgFoo
files are renamed CFWL_MessageFoo. The event and message preceed the type in
order to keep the files sorted together and to make it clear that they're all
related.

Review-Url: https://codereview.chromium.org/2559173002

1 files changed, 504 insertions, 0 deletions

diff --git a/xfa/fwl/cfwl_scrollbar.cpp b/xfa/fwl/cfwl_scrollbar.cpp
new file mode 100644
index 0000000000..d6124c6515
--- /dev/null
+++ b/xfa/fwl/cfwl_scrollbar.cpp
@@ -0,0 +1,504 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "xfa/fwl/cfwl_scrollbar.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+
+#include "third_party/base/ptr_util.h"
+#include "xfa/fwl/cfwl_messagemouse.h"
+#include "xfa/fwl/cfwl_messagemousewheel.h"
+#include "xfa/fwl/cfwl_notedriver.h"
+#include "xfa/fwl/cfwl_themebackground.h"
+#include "xfa/fwl/cfwl_themepart.h"
+#include "xfa/fwl/cfwl_timerinfo.h"
+#include "xfa/fwl/ifwl_themeprovider.h"
+
+#define FWL_SCROLLBAR_Elapse 500
+#define FWL_SCROLLBAR_MinThumb 5
+
+CFWL_ScrollBar::CFWL_ScrollBar(
+    const CFWL_App* app,
+    std::unique_ptr<CFWL_WidgetProperties> properties,
+    CFWL_Widget* pOuter)
+    : CFWL_Widget(app, std::move(properties), pOuter),
+      m_pTimerInfo(nullptr),
+      m_fRangeMin(0),
+      m_fRangeMax(-1),
+      m_fPageSize(0),
+      m_fStepSize(0),
+      m_fPos(0),
+      m_fTrackPos(0),
+      m_iMinButtonState(CFWL_PartState_Normal),
+      m_iMaxButtonState(CFWL_PartState_Normal),
+      m_iThumbButtonState(CFWL_PartState_Normal),
+      m_iMinTrackState(CFWL_PartState_Normal),
+      m_iMaxTrackState(CFWL_PartState_Normal),
+      m_fLastTrackPos(0),
+      m_cpTrackPointX(0),
+      m_cpTrackPointY(0),
+      m_iMouseWheel(0),
+      m_bMouseDown(false),
+      m_fButtonLen(0),
+      m_bMinSize(false),
+      m_fMinThumb(FWL_SCROLLBAR_MinThumb),
+      m_Timer(this) {
+  m_rtClient.Reset();
+  m_rtThumb.Reset();
+  m_rtMinBtn.Reset();
+  m_rtMaxBtn.Reset();
+  m_rtMinTrack.Reset();
+  m_rtMaxTrack.Reset();
+}
+
+CFWL_ScrollBar::~CFWL_ScrollBar() {}
+
+FWL_Type CFWL_ScrollBar::GetClassID() const {
+  return FWL_Type::ScrollBar;
+}
+
+void CFWL_ScrollBar::Update() {
+  if (IsLocked())
+    return;
+  if (!m_pProperties->m_pThemeProvider)
+    m_pProperties->m_pThemeProvider = GetAvailableTheme();
+
+  Layout();
+}
+
+void CFWL_ScrollBar::DrawWidget(CFX_Graphics* pGraphics,
+                                const CFX_Matrix* pMatrix) {
+  if (!pGraphics)
+    return;
+  if (!m_pProperties->m_pThemeProvider)
+    return;
+
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  if (HasBorder())
+    DrawBorder(pGraphics, CFWL_Part::Border, pTheme, pMatrix);
+  if (HasEdge())
+    DrawEdge(pGraphics, CFWL_Part::Edge, pTheme, pMatrix);
+  DrawTrack(pGraphics, pTheme, true, pMatrix);
+  DrawTrack(pGraphics, pTheme, false, pMatrix);
+  DrawArrowBtn(pGraphics, pTheme, true, pMatrix);
+  DrawArrowBtn(pGraphics, pTheme, false, pMatrix);
+  DrawThumb(pGraphics, pTheme, pMatrix);
+}
+
+void CFWL_ScrollBar::SetTrackPos(FX_FLOAT fTrackPos) {
+  m_fTrackPos = fTrackPos;
+  CalcThumbButtonRect(m_rtThumb);
+  CalcMinTrackRect(m_rtMinTrack);
+  CalcMaxTrackRect(m_rtMaxTrack);
+}
+
+bool CFWL_ScrollBar::DoScroll(CFWL_EventScroll::Code dwCode, FX_FLOAT fPos) {
+  if (dwCode == CFWL_EventScroll::Code::None)
+    return false;
+  return OnScroll(dwCode, fPos);
+}
+
+void CFWL_ScrollBar::DrawTrack(CFX_Graphics* pGraphics,
+                               IFWL_ThemeProvider* pTheme,
+                               bool bLower,
+                               const CFX_Matrix* pMatrix) {
+  CFWL_ThemeBackground param;
+  param.m_pWidget = this;
+  param.m_iPart = bLower ? CFWL_Part::LowerTrack : CFWL_Part::UpperTrack;
+  param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
+                         ? CFWL_PartState_Disabled
+                         : (bLower ? m_iMinTrackState : m_iMaxTrackState);
+  param.m_pGraphics = pGraphics;
+  param.m_matrix.Concat(*pMatrix);
+  param.m_rtPart = bLower ? m_rtMinTrack : m_rtMaxTrack;
+  pTheme->DrawBackground(&param);
+}
+
+void CFWL_ScrollBar::DrawArrowBtn(CFX_Graphics* pGraphics,
+                                  IFWL_ThemeProvider* pTheme,
+                                  bool bMinBtn,
+                                  const CFX_Matrix* pMatrix) {
+  CFWL_ThemeBackground param;
+  param.m_pWidget = this;
+  param.m_iPart = bMinBtn ? CFWL_Part::ForeArrow : CFWL_Part::BackArrow;
+  param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
+                         ? CFWL_PartState_Disabled
+                         : (bMinBtn ? m_iMinButtonState : m_iMaxButtonState);
+  param.m_pGraphics = pGraphics;
+  param.m_matrix.Concat(*pMatrix);
+  param.m_rtPart = bMinBtn ? m_rtMinBtn : m_rtMaxBtn;
+  if (param.m_rtPart.height > 0 && param.m_rtPart.width > 0)
+    pTheme->DrawBackground(&param);
+}
+
+void CFWL_ScrollBar::DrawThumb(CFX_Graphics* pGraphics,
+                               IFWL_ThemeProvider* pTheme,
+                               const CFX_Matrix* pMatrix) {
+  CFWL_ThemeBackground param;
+  param.m_pWidget = this;
+  param.m_iPart = CFWL_Part::Thumb;
+  param.m_dwStates = (m_pProperties->m_dwStates & FWL_WGTSTATE_Disabled)
+                         ? CFWL_PartState_Disabled
+                         : m_iThumbButtonState;
+  param.m_pGraphics = pGraphics;
+  param.m_matrix.Concat(*pMatrix);
+  param.m_rtPart = m_rtThumb;
+  pTheme->DrawBackground(&param);
+}
+
+void CFWL_ScrollBar::Layout() {
+  IFWL_ThemeProvider* pTheme = m_pProperties->m_pThemeProvider;
+  CFWL_ThemePart part;
+  part.m_pWidget = this;
+  m_fMinThumb = *static_cast<FX_FLOAT*>(
+      pTheme->GetCapacity(&part, CFWL_WidgetCapacity::Size));
+  GetClientRect(m_rtClient);
+  CalcButtonLen();
+  CalcMinButtonRect(m_rtMinBtn);
+  CalcMaxButtonRect(m_rtMaxBtn);
+  CalcThumbButtonRect(m_rtThumb);
+  CalcMinTrackRect(m_rtMinTrack);
+  CalcMaxTrackRect(m_rtMaxTrack);
+}
+
+void CFWL_ScrollBar::CalcButtonLen() {
+  m_fButtonLen = IsVertical() ? m_rtClient.width : m_rtClient.height;
+  FX_FLOAT fLength = IsVertical() ? m_rtClient.height : m_rtClient.width;
+  if (fLength < m_fButtonLen * 2) {
+    m_fButtonLen = fLength / 2;
+    m_bMinSize = true;
+  } else {
+    m_bMinSize = false;
+  }
+}
+
+void CFWL_ScrollBar::CalcMinButtonRect(CFX_RectF& rect) {
+  rect.left = m_rtClient.left;
+  rect.top = m_rtClient.top;
+  rect.width = IsVertical() ? m_rtClient.width : m_fButtonLen;
+  rect.height = IsVertical() ? m_fButtonLen : m_rtClient.height;
+}
+
+void CFWL_ScrollBar::CalcMaxButtonRect(CFX_RectF& rect) {
+  rect.left =
+      IsVertical() ? m_rtClient.left : m_rtClient.right() - m_fButtonLen;
+  rect.top = IsVertical() ? m_rtClient.bottom() - m_fButtonLen : m_rtClient.top;
+  rect.width = IsVertical() ? m_rtClient.width : m_fButtonLen;
+  rect.height = IsVertical() ? m_fButtonLen : m_rtClient.height;
+}
+
+void CFWL_ScrollBar::CalcThumbButtonRect(CFX_RectF& rect) {
+  if (!IsEnabled()) {
+    m_rtThumb.Reset();
+    return;
+  }
+  if (m_bMinSize) {
+    m_rtThumb.Empty();
+    return;
+  }
+
+  FX_FLOAT fRange = m_fRangeMax - m_fRangeMin;
+  memset(&rect, 0, sizeof(CFX_Rect));
+  if (fRange < 0) {
+    if (IsVertical())
+      rect.Set(m_rtClient.left, m_rtMaxBtn.bottom(), m_rtClient.width, 0);
+    else
+      rect.Set(m_rtMaxBtn.right(), m_rtClient.top, 0, m_rtClient.height);
+    return;
+  }
+
+  CFX_RectF rtClient = m_rtClient;
+  FX_FLOAT fLength = IsVertical() ? rtClient.height : rtClient.width;
+  FX_FLOAT fSize = m_fButtonLen;
+  fLength -= fSize * 2.0f;
+  if (fLength < fSize)
+    fLength = 0.0f;
+
+  FX_FLOAT fThumbSize = fLength * fLength / (fRange + fLength);
+  fThumbSize = std::max(fThumbSize, m_fMinThumb);
+
+  FX_FLOAT fDiff = std::max(fLength - fThumbSize, 0.0f);
+  FX_FLOAT fTrackPos =
+      std::max(std::min(m_fTrackPos, m_fRangeMax), m_fRangeMin);
+  if (!fRange)
+    return;
+
+  FX_FLOAT iPos = fSize + fDiff * (fTrackPos - m_fRangeMin) / fRange;
+  rect.left = rtClient.left;
+  if (!IsVertical())
+    rect.left += iPos;
+
+  rect.top = rtClient.top;
+  if (IsVertical())
+    rect.top += iPos;
+
+  rect.width = IsVertical() ? rtClient.width : fThumbSize;
+  rect.height = IsVertical() ? fThumbSize : rtClient.height;
+}
+
+void CFWL_ScrollBar::CalcMinTrackRect(CFX_RectF& rect) {
+  if (m_bMinSize) {
+    rect.Empty();
+    return;
+  }
+
+  FX_FLOAT fBottom = m_rtThumb.bottom();
+  FX_FLOAT fRight = m_rtThumb.right();
+  FX_FLOAT ix = (m_rtThumb.left + fRight) / 2;
+  FX_FLOAT iy = (m_rtThumb.top + fBottom) / 2;
+  rect.left = m_rtClient.left;
+  rect.top = m_rtClient.top;
+  bool bVertical = IsVertical();
+  rect.width = bVertical ? m_rtClient.width : ix;
+  rect.height = bVertical ? iy : m_rtClient.height;
+}
+
+void CFWL_ScrollBar::CalcMaxTrackRect(CFX_RectF& rect) {
+  if (m_bMinSize) {
+    rect.Empty();
+    return;
+  }
+
+  FX_FLOAT ix = (m_rtThumb.left + m_rtThumb.right()) / 2;
+  FX_FLOAT iy = (m_rtThumb.top + m_rtThumb.bottom()) / 2;
+  bool bVertical = IsVertical();
+  rect.left = bVertical ? m_rtClient.left : ix;
+  rect.top = bVertical ? iy : m_rtClient.top;
+  rect.width = bVertical ? m_rtClient.width : m_rtClient.right() - ix;
+  rect.height = bVertical ? m_rtClient.bottom() - iy : m_rtClient.height;
+}
+
+FX_FLOAT CFWL_ScrollBar::GetTrackPointPos(FX_FLOAT fx, FX_FLOAT fy) {
+  FX_FLOAT fDiffX = fx - m_cpTrackPointX;
+  FX_FLOAT fDiffY = fy - m_cpTrackPointY;
+  FX_FLOAT fRange = m_fRangeMax - m_fRangeMin;
+  FX_FLOAT fPos;
+
+  if (IsVertical()) {
+    fPos = fRange * fDiffY /
+           (m_rtMaxBtn.top - m_rtMinBtn.bottom() - m_rtThumb.height);
+  } else {
+    fPos = fRange * fDiffX /
+           (m_rtMaxBtn.left - m_rtMinBtn.right() - m_rtThumb.width);
+  }
+
+  fPos += m_fLastTrackPos;
+  return std::min(std::max(fPos, m_fRangeMin), m_fRangeMax);
+}
+
+bool CFWL_ScrollBar::SendEvent() {
+  if (m_iMinButtonState == CFWL_PartState_Pressed) {
+    DoScroll(CFWL_EventScroll::Code::StepBackward, m_fTrackPos);
+    return false;
+  }
+  if (m_iMaxButtonState == CFWL_PartState_Pressed) {
+    DoScroll(CFWL_EventScroll::Code::StepForward, m_fTrackPos);
+    return false;
+  }
+  if (m_iMinTrackState == CFWL_PartState_Pressed) {
+    DoScroll(CFWL_EventScroll::Code::PageBackward, m_fTrackPos);
+    return m_rtThumb.Contains(m_cpTrackPointX, m_cpTrackPointY);
+  }
+  if (m_iMaxTrackState == CFWL_PartState_Pressed) {
+    DoScroll(CFWL_EventScroll::Code::PageForward, m_fTrackPos);
+    return m_rtThumb.Contains(m_cpTrackPointX, m_cpTrackPointY);
+  }
+  if (m_iMouseWheel) {
+    CFWL_EventScroll::Code dwCode = m_iMouseWheel < 0
+                                        ? CFWL_EventScroll::Code::StepForward
+                                        : CFWL_EventScroll::Code::StepBackward;
+    DoScroll(dwCode, m_fTrackPos);
+  }
+  return true;
+}
+
+bool CFWL_ScrollBar::OnScroll(CFWL_EventScroll::Code dwCode, FX_FLOAT fPos) {
+  CFWL_EventScroll ev(this);
+  ev.m_iScrollCode = dwCode;
+  ev.m_fPos = fPos;
+  DispatchEvent(&ev);
+  return true;
+}
+
+void CFWL_ScrollBar::OnProcessMessage(CFWL_Message* pMessage) {
+  if (!pMessage)
+    return;
+
+  CFWL_Message::Type type = pMessage->GetType();
+  if (type == CFWL_Message::Type::Mouse) {
+    CFWL_MessageMouse* pMsg = static_cast<CFWL_MessageMouse*>(pMessage);
+    switch (pMsg->m_dwCmd) {
+      case FWL_MouseCommand::LeftButtonDown:
+        OnLButtonDown(pMsg->m_dwFlags, pMsg->m_fx, pMsg->m_fy);
+        break;
+      case FWL_MouseCommand::LeftButtonUp:
+        OnLButtonUp(pMsg->m_dwFlags, pMsg->m_fx, pMsg->m_fy);
+        break;
+      case FWL_MouseCommand::Move:
+        OnMouseMove(pMsg->m_dwFlags, pMsg->m_fx, pMsg->m_fy);
+        break;
+      case FWL_MouseCommand::Leave:
+        OnMouseLeave();
+        break;
+      default:
+        break;
+    }
+  } else if (type == CFWL_Message::Type::MouseWheel) {
+    CFWL_MessageMouseWheel* pMsg =
+        static_cast<CFWL_MessageMouseWheel*>(pMessage);
+    OnMouseWheel(pMsg->m_fx, pMsg->m_fy, pMsg->m_dwFlags, pMsg->m_fDeltaX,
+                 pMsg->m_fDeltaY);
+  }
+}
+
+void CFWL_ScrollBar::OnDrawWidget(CFX_Graphics* pGraphics,
+                                  const CFX_Matrix* pMatrix) {
+  DrawWidget(pGraphics, pMatrix);
+}
+
+void CFWL_ScrollBar::OnLButtonDown(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
+  if (!IsEnabled())
+    return;
+
+  m_bMouseDown = true;
+  SetGrab(true);
+  m_cpTrackPointX = fx;
+  m_cpTrackPointY = fy;
+  m_fLastTrackPos = m_fTrackPos;
+  if (m_rtMinBtn.Contains(fx, fy))
+    DoMouseDown(0, m_rtMinBtn, m_iMinButtonState, fx, fy);
+  else if (m_rtThumb.Contains(fx, fy))
+    DoMouseDown(1, m_rtThumb, m_iThumbButtonState, fx, fy);
+  else if (m_rtMaxBtn.Contains(fx, fy))
+    DoMouseDown(2, m_rtMaxBtn, m_iMaxButtonState, fx, fy);
+  else if (m_rtMinTrack.Contains(fx, fy))
+    DoMouseDown(3, m_rtMinTrack, m_iMinTrackState, fx, fy);
+  else
+    DoMouseDown(4, m_rtMaxTrack, m_iMaxTrackState, fx, fy);
+
+  if (!SendEvent())
+    m_pTimerInfo = m_Timer.StartTimer(FWL_SCROLLBAR_Elapse, true);
+}
+
+void CFWL_ScrollBar::OnLButtonUp(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
+  m_pTimerInfo->StopTimer();
+  m_bMouseDown = false;
+  DoMouseUp(0, m_rtMinBtn, m_iMinButtonState, fx, fy);
+  DoMouseUp(1, m_rtThumb, m_iThumbButtonState, fx, fy);
+  DoMouseUp(2, m_rtMaxBtn, m_iMaxButtonState, fx, fy);
+  DoMouseUp(3, m_rtMinTrack, m_iMinTrackState, fx, fy);
+  DoMouseUp(4, m_rtMaxTrack, m_iMaxTrackState, fx, fy);
+  SetGrab(false);
+}
+
+void CFWL_ScrollBar::OnMouseMove(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
+  DoMouseMove(0, m_rtMinBtn, m_iMinButtonState, fx, fy);
+  DoMouseMove(1, m_rtThumb, m_iThumbButtonState, fx, fy);
+  DoMouseMove(2, m_rtMaxBtn, m_iMaxButtonState, fx, fy);
+  DoMouseMove(3, m_rtMinTrack, m_iMinTrackState, fx, fy);
+  DoMouseMove(4, m_rtMaxTrack, m_iMaxTrackState, fx, fy);
+}
+
+void CFWL_ScrollBar::OnMouseLeave() {
+  DoMouseLeave(0, m_rtMinBtn, m_iMinButtonState);
+  DoMouseLeave(1, m_rtThumb, m_iThumbButtonState);
+  DoMouseLeave(2, m_rtMaxBtn, m_iMaxButtonState);
+  DoMouseLeave(3, m_rtMinTrack, m_iMinTrackState);
+  DoMouseLeave(4, m_rtMaxTrack, m_iMaxTrackState);
+}
+
+void CFWL_ScrollBar::OnMouseWheel(FX_FLOAT fx,
+                                  FX_FLOAT fy,
+                                  uint32_t dwFlags,
+                                  FX_FLOAT fDeltaX,
+                                  FX_FLOAT fDeltaY) {
+  m_iMouseWheel = (int32_t)fDeltaX;
+  SendEvent();
+  m_iMouseWheel = 0;
+}
+
+void CFWL_ScrollBar::DoMouseDown(int32_t iItem,
+                                 const CFX_RectF& rtItem,
+                                 int32_t& iState,
+                                 FX_FLOAT fx,
+                                 FX_FLOAT fy) {
+  if (!rtItem.Contains(fx, fy))
+    return;
+  if (iState == CFWL_PartState_Pressed)
+    return;
+
+  iState = CFWL_PartState_Pressed;
+  Repaint(&rtItem);
+}
+
+void CFWL_ScrollBar::DoMouseUp(int32_t iItem,
+                               const CFX_RectF& rtItem,
+                               int32_t& iState,
+                               FX_FLOAT fx,
+                               FX_FLOAT fy) {
+  int32_t iNewState =
+      rtItem.Contains(fx, fy) ? CFWL_PartState_Hovered : CFWL_PartState_Normal;
+  if (iState == iNewState)
+    return;
+
+  iState = iNewState;
+  Repaint(&rtItem);
+  OnScroll(CFWL_EventScroll::Code::EndScroll, m_fTrackPos);
+}
+
+void CFWL_ScrollBar::DoMouseMove(int32_t iItem,
+                                 const CFX_RectF& rtItem,
+                                 int32_t& iState,
+                                 FX_FLOAT fx,
+                                 FX_FLOAT fy) {
+  if (!m_bMouseDown) {
+    int32_t iNewState = rtItem.Contains(fx, fy) ? CFWL_PartState_Hovered
+                                                : CFWL_PartState_Normal;
+    if (iState == iNewState)
+      return;
+
+    iState = iNewState;
+    Repaint(&rtItem);
+  } else if ((2 == iItem) && (m_iThumbButtonState == CFWL_PartState_Pressed)) {
+    FX_FLOAT fPos = GetTrackPointPos(fx, fy);
+    m_fTrackPos = fPos;
+    OnScroll(CFWL_EventScroll::Code::TrackPos, fPos);
+  }
+}
+
+void CFWL_ScrollBar::DoMouseLeave(int32_t iItem,
+                                  const CFX_RectF& rtItem,
+                                  int32_t& iState) {
+  if (iState == CFWL_PartState_Normal)
+    return;
+
+  iState = CFWL_PartState_Normal;
+  Repaint(&rtItem);
+}
+
+void CFWL_ScrollBar::DoMouseHover(int32_t iItem,
+                                  const CFX_RectF& rtItem,
+                                  int32_t& iState) {
+  if (iState == CFWL_PartState_Hovered)
+    return;
+
+  iState = CFWL_PartState_Hovered;
+  Repaint(&rtItem);
+}
+
+CFWL_ScrollBar::Timer::Timer(CFWL_ScrollBar* pToolTip) : CFWL_Timer(pToolTip) {}
+
+void CFWL_ScrollBar::Timer::Run(CFWL_TimerInfo* pTimerInfo) {
+  CFWL_ScrollBar* pButton = static_cast<CFWL_ScrollBar*>(m_pWidget);
+
+  if (pButton->m_pTimerInfo)
+    pButton->m_pTimerInfo->StopTimer();
+
+  if (!pButton->SendEvent())
+    pButton->m_pTimerInfo = StartTimer(0, true);
+}