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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef FontFace_h
     32 #define FontFace_h
     33 
     34 #include "bindings/core/v8/ScriptPromise.h"
     35 #include "bindings/core/v8/ScriptPromiseProperty.h"
     36 #include "bindings/core/v8/ScriptWrappable.h"
     37 #include "core/CSSPropertyNames.h"
     38 #include "core/css/CSSValue.h"
     39 #include "core/dom/ActiveDOMObject.h"
     40 #include "core/dom/DOMException.h"
     41 #include "platform/fonts/FontTraits.h"
     42 #include "wtf/PassRefPtr.h"
     43 #include "wtf/RefCounted.h"
     44 #include "wtf/text/WTFString.h"
     45 
     46 namespace blink {
     47 
     48 class CSSFontFace;
     49 class CSSValueList;
     50 class Dictionary;
     51 class Document;
     52 class ExceptionState;
     53 class FontFaceDescriptors;
     54 class StylePropertySet;
     55 class StyleRuleFontFace;
     56 
     57 class FontFace : public RefCountedWillBeGarbageCollectedFinalized<FontFace>, public ScriptWrappable, public ActiveDOMObject {
     58     DEFINE_WRAPPERTYPEINFO();
     59 public:
     60     enum LoadStatus { Unloaded, Loading, Loaded, Error };
     61 
     62     static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, PassRefPtr<ArrayBuffer> source, const FontFaceDescriptors&);
     63     static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, PassRefPtr<ArrayBufferView>, const FontFaceDescriptors&);
     64     static PassRefPtrWillBeRawPtr<FontFace> create(ExecutionContext*, const AtomicString& family, const String& source, const FontFaceDescriptors&);
     65     static PassRefPtrWillBeRawPtr<FontFace> create(Document*, const StyleRuleFontFace*);
     66 
     67     ~FontFace();
     68 
     69     const AtomicString& family() const { return m_family; }
     70     String style() const;
     71     String weight() const;
     72     String stretch() const;
     73     String unicodeRange() const;
     74     String variant() const;
     75     String featureSettings() const;
     76 
     77     // FIXME: Changing these attributes should affect font matching.
     78     void setFamily(ExecutionContext*, const AtomicString& s, ExceptionState&) { m_family = s; }
     79     void setStyle(ExecutionContext*, const String&, ExceptionState&);
     80     void setWeight(ExecutionContext*, const String&, ExceptionState&);
     81     void setStretch(ExecutionContext*, const String&, ExceptionState&);
     82     void setUnicodeRange(ExecutionContext*, const String&, ExceptionState&);
     83     void setVariant(ExecutionContext*, const String&, ExceptionState&);
     84     void setFeatureSettings(ExecutionContext*, const String&, ExceptionState&);
     85 
     86     String status() const;
     87     ScriptPromise loaded(ScriptState* scriptState) { return fontStatusPromise(scriptState); }
     88 
     89     ScriptPromise load(ScriptState*);
     90 
     91     LoadStatus loadStatus() const { return m_status; }
     92     void setLoadStatus(LoadStatus);
     93     void setError(PassRefPtrWillBeRawPtr<DOMException> = nullptr);
     94     DOMException* error() const { return m_error.get(); }
     95     FontTraits traits() const;
     96     CSSFontFace* cssFontFace() { return m_cssFontFace.get(); }
     97 
     98     void trace(Visitor*);
     99 
    100     bool hadBlankText() const;
    101 
    102     class LoadFontCallback : public RefCountedWillBeGarbageCollectedFinalized<LoadFontCallback> {
    103     public:
    104         virtual ~LoadFontCallback() { }
    105         virtual void notifyLoaded(FontFace*) = 0;
    106         virtual void notifyError(FontFace*) = 0;
    107         virtual void trace(Visitor*) { }
    108     };
    109     void loadWithCallback(PassRefPtrWillBeRawPtr<LoadFontCallback>, ExecutionContext*);
    110 
    111     // ActiveDOMObject
    112     virtual bool hasPendingActivity() const OVERRIDE;
    113 
    114 private:
    115     explicit FontFace(ExecutionContext*);
    116     FontFace(ExecutionContext*, const AtomicString& family, const FontFaceDescriptors&);
    117 
    118     void initCSSFontFace(Document*, PassRefPtrWillBeRawPtr<CSSValue> src);
    119     void initCSSFontFace(const unsigned char* data, unsigned size);
    120     void setPropertyFromString(const Document*, const String&, CSSPropertyID, ExceptionState* = 0);
    121     bool setPropertyFromStyle(const StylePropertySet&, CSSPropertyID);
    122     bool setPropertyValue(PassRefPtrWillBeRawPtr<CSSValue>, CSSPropertyID);
    123     bool setFamilyValue(CSSValueList*);
    124     void loadInternal(ExecutionContext*);
    125     ScriptPromise fontStatusPromise(ScriptState*);
    126 
    127     typedef ScriptPromiseProperty<RawPtrWillBeMember<FontFace>, RawPtrWillBeMember<FontFace>, RefPtrWillBeMember<DOMException> > LoadedProperty;
    128 
    129     AtomicString m_family;
    130     RefPtrWillBeMember<CSSValue> m_src;
    131     RefPtrWillBeMember<CSSValue> m_style;
    132     RefPtrWillBeMember<CSSValue> m_weight;
    133     RefPtrWillBeMember<CSSValue> m_stretch;
    134     RefPtrWillBeMember<CSSValue> m_unicodeRange;
    135     RefPtrWillBeMember<CSSValue> m_variant;
    136     RefPtrWillBeMember<CSSValue> m_featureSettings;
    137     LoadStatus m_status;
    138     RefPtrWillBeMember<DOMException> m_error;
    139 
    140     PersistentWillBeMember<LoadedProperty> m_loadedProperty;
    141     OwnPtrWillBeMember<CSSFontFace> m_cssFontFace;
    142     WillBeHeapVector<RefPtrWillBeMember<LoadFontCallback> > m_callbacks;
    143 };
    144 
    145 typedef WillBeHeapVector<RefPtrWillBeMember<FontFace> > FontFaceArray;
    146 
    147 } // namespace blink
    148 
    149 #endif // FontFace_h
    150