summaryrefslogtreecommitdiff
path: root/dom/svg/nsSVGViewBox.h
blob: 9b046a965687b4d561b55d3c6376e9c34b7509e2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __NS_SVGVIEWBOX_H__
#define __NS_SVGVIEWBOX_H__

#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "mozilla/dom/SVGAnimatedRect.h"
#include "mozilla/dom/SVGIRect.h"
#include "nsISMILAttr.h"
#include "nsSVGElement.h"
#include "mozilla/Attributes.h"
#include "nsSVGAttrTearoffTable.h"

class nsSMILValue;

namespace mozilla {
namespace dom {
class SVGAnimationElement;
} // namespace dom
} // namespace mozilla

struct nsSVGViewBoxRect
{
  float x, y;
  float width, height;
  bool none;

  nsSVGViewBoxRect() : none(true) {}
  nsSVGViewBoxRect(float aX, float aY, float aWidth, float aHeight) :
    x(aX), y(aY), width(aWidth), height(aHeight), none(false) {}
  nsSVGViewBoxRect(const nsSVGViewBoxRect& rhs) :
    x(rhs.x), y(rhs.y), width(rhs.width), height(rhs.height), none(rhs.none) {}
  bool operator==(const nsSVGViewBoxRect& aOther) const;
};

class nsSVGViewBox
{
public:

  void Init();

  /**
   * Returns true if the corresponding "viewBox" attribute defined a rectangle
   * with finite values and nonnegative width/height.
   * Returns false if the viewBox was set to an invalid
   * string, or if any of the four rect values were too big to store in a
   * float, or the width/height are negative.
   */
  bool HasRect() const;

  /**
   * Returns true if the corresponding "viewBox" attribute either defined a
   * rectangle with finite values or the special "none" value.
   */
  bool IsExplicitlySet() const
    {
      if (mAnimVal || mHasBaseVal) {
        const nsSVGViewBoxRect& rect = GetAnimValue();
        return rect.none || (rect.width >= 0 && rect.height >= 0);
      }
      return false;
    }

  const nsSVGViewBoxRect& GetBaseValue() const
    { return mBaseVal; }
  void SetBaseValue(const nsSVGViewBoxRect& aRect,
                    nsSVGElement *aSVGElement);
  const nsSVGViewBoxRect& GetAnimValue() const
    { return mAnimVal ? *mAnimVal : mBaseVal; }
  void SetAnimValue(const nsSVGViewBoxRect& aRect,
                    nsSVGElement *aSVGElement);

  nsresult SetBaseValueString(const nsAString& aValue,
                              nsSVGElement *aSVGElement,
                              bool aDoSetAttr);
  void GetBaseValueString(nsAString& aValue) const;

  already_AddRefed<mozilla::dom::SVGAnimatedRect>
  ToSVGAnimatedRect(nsSVGElement *aSVGElement);

  already_AddRefed<mozilla::dom::SVGIRect>
  ToDOMBaseVal(nsSVGElement* aSVGElement);

  already_AddRefed<mozilla::dom::SVGIRect>
  ToDOMAnimVal(nsSVGElement* aSVGElement);

  // Returns a new nsISMILAttr object that the caller must delete
  nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);

private:

  nsSVGViewBoxRect mBaseVal;
  nsAutoPtr<nsSVGViewBoxRect> mAnimVal;
  bool mHasBaseVal;

public:
  struct DOMBaseVal final : public mozilla::dom::SVGIRect
  {
    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMBaseVal)

    DOMBaseVal(nsSVGViewBox *aVal, nsSVGElement *aSVGElement)
      : mozilla::dom::SVGIRect()
      , mVal(aVal)
      , mSVGElement(aSVGElement)
    {}

    nsSVGViewBox* mVal; // kept alive because it belongs to content
    RefPtr<nsSVGElement> mSVGElement;

    float X() const override final
    {
      return mVal->GetBaseValue().x;
    }

    float Y() const override final
    {
      return mVal->GetBaseValue().y;
    }

    float Width() const override final
    {
      return mVal->GetBaseValue().width;
    }

    float Height() const override final
    {
      return mVal->GetBaseValue().height;
    }

    void SetX(float aX, mozilla::ErrorResult& aRv) final override;
    void SetY(float aY, mozilla::ErrorResult& aRv) final override;
    void SetWidth(float aWidth, mozilla::ErrorResult& aRv) final override;
    void SetHeight(float aHeight, mozilla::ErrorResult& aRv) final override;

    virtual nsIContent* GetParentObject() const override
    {
      return mSVGElement;
    }

  private:
    virtual ~DOMBaseVal();
  };

  struct DOMAnimVal final : public mozilla::dom::SVGIRect
  {
    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMAnimVal)

    DOMAnimVal(nsSVGViewBox *aVal, nsSVGElement *aSVGElement)
      : mozilla::dom::SVGIRect()
      , mVal(aVal)
      , mSVGElement(aSVGElement)
    {}

    nsSVGViewBox* mVal; // kept alive because it belongs to content
    RefPtr<nsSVGElement> mSVGElement;

    // Script may have modified animation parameters or timeline -- DOM getters
    // need to flush any resample requests to reflect these modifications.
    float X() const override final
    {
      mSVGElement->FlushAnimations();
      return mVal->GetAnimValue().x;
    }

    float Y() const override final
    {
      mSVGElement->FlushAnimations();
      return mVal->GetAnimValue().y;
    }

    float Width() const override final
    {
      mSVGElement->FlushAnimations();
      return mVal->GetAnimValue().width;
    }

    float Height() const override final
    {
      mSVGElement->FlushAnimations();
      return mVal->GetAnimValue().height;
    }

    void SetX(float aX, mozilla::ErrorResult& aRv) final override
    {
      aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
    }

    void SetY(float aY, mozilla::ErrorResult& aRv) final override
    {
      aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
    }

    void SetWidth(float aWidth, mozilla::ErrorResult& aRv) final override
    {
      aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
    }

    void SetHeight(float aHeight, mozilla::ErrorResult& aRv) final override
    {
      aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
    }

    virtual nsIContent* GetParentObject() const override
    {
      return mSVGElement;
    }

  private:
    virtual ~DOMAnimVal();

  };

  struct SMILViewBox : public nsISMILAttr
  {
  public:
    SMILViewBox(nsSVGViewBox* aVal, nsSVGElement* aSVGElement)
      : mVal(aVal), mSVGElement(aSVGElement) {}

    // These will stay alive because a nsISMILAttr only lives as long
    // as the Compositing step, and DOM elements don't get a chance to
    // die during that.
    nsSVGViewBox* mVal;
    nsSVGElement* mSVGElement;

    // nsISMILAttr methods
    virtual nsresult ValueFromString(const nsAString& aStr,
                                     const mozilla::dom::SVGAnimationElement* aSrcElement,
                                     nsSMILValue& aValue,
                                     bool& aPreventCachingOfSandwich) const override;
    virtual nsSMILValue GetBaseValue() const override;
    virtual void ClearAnimValue() override;
    virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
  };

  static nsSVGAttrTearoffTable<nsSVGViewBox, mozilla::dom::SVGAnimatedRect>
    sSVGAnimatedRectTearoffTable;
};

#endif // __NS_SVGVIEWBOX_H__