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1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 
7 #ifndef XFA_FWL_CFWL_WIDGET_H_
8 #define XFA_FWL_CFWL_WIDGET_H_
9 
10 #include <memory>
11 
12 #include "core/fxcrt/fx_coordinates.h"
13 #include "core/fxcrt/fx_system.h"
14 #include "core/fxcrt/unowned_ptr.h"
15 #include "xfa/fde/cfde_data.h"
16 #include "xfa/fwl/cfwl_event.h"
17 #include "xfa/fwl/cfwl_themepart.h"
18 #include "xfa/fwl/cfwl_widgetmgr.h"
19 #include "xfa/fwl/fwl_widgethit.h"
20 #include "xfa/fwl/ifwl_widgetdelegate.h"
21 
22 enum class FWL_Type {
23   Unknown = 0,
24 
25   Barcode,
26   Caret,
27   CheckBox,
28   ComboBox,
29   DateTimePicker,
30   Edit,
31   Form,
32   FormProxy,
33   ListBox,
34   MonthCalendar,
35   PictureBox,
36   PushButton,
37   ScrollBar,
38   SpinButton,
39   ToolTip
40 };
41 
42 class CFWL_App;
43 class CFWL_AppImp;
44 class CFWL_MessageKey;
45 class CFWL_Widget;
46 class CFWL_WidgetMgr;
47 class CFWL_WidgetProperties;
48 class CXFA_FFWidget;
49 class IFWL_ThemeProvider;
50 
51 class CFWL_Widget : public IFWL_WidgetDelegate {
52  public:
53   ~CFWL_Widget() override;
54 
55   virtual FWL_Type GetClassID() const = 0;
56   virtual bool IsInstance(const WideStringView& wsClass) const;
57   virtual CFX_RectF GetAutosizedWidgetRect();
58   virtual CFX_RectF GetWidgetRect();
59   virtual CFX_RectF GetClientRect();
60   virtual void ModifyStylesEx(uint32_t dwStylesExAdded,
61                               uint32_t dwStylesExRemoved);
62   virtual void SetStates(uint32_t dwStates);
63   virtual void RemoveStates(uint32_t dwStates);
64   virtual void Update() = 0;
65   virtual FWL_WidgetHit HitTest(const CFX_PointF& point);
66   virtual void DrawWidget(CXFA_Graphics* pGraphics,
67                           const CFX_Matrix& matrix) = 0;
68   virtual void SetThemeProvider(IFWL_ThemeProvider* pThemeProvider);
69 
70   // IFWL_WidgetDelegate.
71   void OnProcessMessage(CFWL_Message* pMessage) override;
72   void OnProcessEvent(CFWL_Event* pEvent) override;
73   void OnDrawWidget(CXFA_Graphics* pGraphics,
74                     const CFX_Matrix& matrix) override;
75 
76   void InflateWidgetRect(CFX_RectF& rect);
77   void SetWidgetRect(const CFX_RectF& rect);
78 
79   void SetParent(CFWL_Widget* pParent);
80 
GetOwner()81   CFWL_Widget* GetOwner() { return m_pWidgetMgr->GetOwnerWidget(this); }
GetOuter()82   CFWL_Widget* GetOuter() const { return m_pOuter; }
83 
84   uint32_t GetStyles() const;
85   void ModifyStyles(uint32_t dwStylesAdded, uint32_t dwStylesRemoved);
86   uint32_t GetStylesEx() const;
87   uint32_t GetStates() const;
88 
LockUpdate()89   void LockUpdate() { m_iLock++; }
UnlockUpdate()90   void UnlockUpdate() {
91     if (IsLocked())
92       m_iLock--;
93   }
94 
95   CFX_PointF TransformTo(CFWL_Widget* pWidget, const CFX_PointF& point);
96   CFX_Matrix GetMatrix();
97   IFWL_ThemeProvider* GetThemeProvider() const;
98 
SetDelegate(IFWL_WidgetDelegate * delegate)99   void SetDelegate(IFWL_WidgetDelegate* delegate) { m_pDelegate = delegate; }
GetDelegate()100   IFWL_WidgetDelegate* GetDelegate() {
101     return m_pDelegate ? m_pDelegate.Get() : this;
102   }
GetDelegate()103   const IFWL_WidgetDelegate* GetDelegate() const {
104     return m_pDelegate ? m_pDelegate.Get() : this;
105   }
106 
GetOwnerApp()107   const CFWL_App* GetOwnerApp() const { return m_pOwnerApp.Get(); }
GetEventKey()108   uint32_t GetEventKey() const { return m_nEventKey; }
SetEventKey(uint32_t key)109   void SetEventKey(uint32_t key) { m_nEventKey = key; }
110 
GetLayoutItem()111   CXFA_FFWidget* GetLayoutItem() const { return m_pLayoutItem; }
SetLayoutItem(CXFA_FFWidget * pItem)112   void SetLayoutItem(CXFA_FFWidget* pItem) { m_pLayoutItem = pItem; }
113 
114   void SetFocus(bool bFocus);
115   void RepaintRect(const CFX_RectF& pRect);
116   void Repaint();
117 
118  protected:
119   CFWL_Widget(const CFWL_App* app,
120               std::unique_ptr<CFWL_WidgetProperties> properties,
121               CFWL_Widget* pOuter);
122 
123   bool IsEnabled() const;
IsLocked()124   bool IsLocked() const { return m_iLock > 0; }
125   bool HasBorder() const;
126   CFX_RectF GetEdgeRect();
127   float GetBorderSize(bool bCX);
128   CFX_RectF GetRelativeRect();
129   IFWL_ThemeProvider* GetAvailableTheme();
130   CFX_SizeF CalcTextSize(const WideString& wsText,
131                          IFWL_ThemeProvider* pTheme,
132                          bool bMultiLine);
133   void CalcTextRect(const WideString& wsText,
134                     IFWL_ThemeProvider* pTheme,
135                     const FDE_TextStyle& dwTTOStyles,
136                     FDE_TextAlignment iTTOAlign,
137                     CFX_RectF& rect);
138   void SetGrab(bool bSet);
139   void GetPopupPos(float fMinHeight,
140                    float fMaxHeight,
141                    const CFX_RectF& rtAnchor,
142                    CFX_RectF& rtPopup);
143   void RegisterEventTarget(CFWL_Widget* pEventSource);
144   void UnregisterEventTarget();
145   void DispatchEvent(CFWL_Event* pEvent);
146   void DrawBorder(CXFA_Graphics* pGraphics,
147                   CFWL_Part iPartBorder,
148                   IFWL_ThemeProvider* pTheme,
149                   const CFX_Matrix& pMatrix);
150 
151   UnownedPtr<const CFWL_App> const m_pOwnerApp;
152   UnownedPtr<CFWL_WidgetMgr> const m_pWidgetMgr;
153   std::unique_ptr<CFWL_WidgetProperties> m_pProperties;
154   CFWL_Widget* m_pOuter;
155   int32_t m_iLock;
156 
157  private:
GetParent()158   CFWL_Widget* GetParent() { return m_pWidgetMgr->GetParentWidget(this); }
159   CFX_SizeF GetOffsetFromParent(CFWL_Widget* pParent);
160 
161   bool IsVisible() const;
162   bool IsOverLapper() const;
163   bool IsPopup() const;
164   bool IsChild() const;
165   CFWL_Widget* GetRootOuter();
166   bool GetPopupPosMenu(float fMinHeight,
167                        float fMaxHeight,
168                        const CFX_RectF& rtAnchor,
169                        CFX_RectF& rtPopup);
170   bool GetPopupPosComboBox(float fMinHeight,
171                            float fMaxHeight,
172                            const CFX_RectF& rtAnchor,
173                            CFX_RectF& rtPopup);
174   bool GetPopupPosGeneral(float fMinHeight,
175                           float fMaxHeight,
176                           const CFX_RectF& rtAnchor,
177                           CFX_RectF& rtPopup);
178   void DrawBackground(CXFA_Graphics* pGraphics,
179                       CFWL_Part iPartBk,
180                       IFWL_ThemeProvider* pTheme,
181                       const CFX_Matrix* pMatrix);
182   void NotifyDriver();
183   bool IsParent(CFWL_Widget* pParent);
184 
185   CXFA_FFWidget* m_pLayoutItem;
186   uint32_t m_nEventKey;
187   UnownedPtr<IFWL_WidgetDelegate> m_pDelegate;
188 };
189 
190 #endif  // XFA_FWL_CFWL_WIDGET_H_
191