author | William Roberts <williamr@symbian.org> |
Tue, 16 Mar 2010 16:12:26 +0000 | |
branch | Symbian2 |
changeset 2 | 2fe1408b6811 |
parent 0 | 061f57f2323e |
permissions | -rw-r--r-- |
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// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// the class for inline-text format retrieval - in its own header file to prevent low-level |
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// components dependent on this class from gaining unnecessary (and undesirable) dependencies |
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// on high-level components |
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// |
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// |
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#ifndef __FEPITFR_H__ |
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#define __FEPITFR_H__ |
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#include <e32std.h> |
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class TCharFormat; |
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/** Specifies the mixin protocol for finding out the formatting to apply to inline |
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text. |
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This class should be overridden by front end processors which support inline editing. |
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An instance of a class which implements this protocol should be passed to |
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MCoeFepAwareTextEditor::StartFepInlineEditL(). |
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@publishedAll |
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@released */ |
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class MFepInlineTextFormatRetriever // to be overridden by inline-editing front-end processors |
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{ |
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public: |
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/** Gets the character formatting to apply to the inline text. |
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This function may be used to differentiate the formatting of the inline text |
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from the surrounding text. The first parameter should be set to contain the |
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character formatting values to use. |
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MCoeFepAwareTextEditor provides a member function for finding out the character |
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formatting of the surrounding text - GetFormatForFep(). This can be called |
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inside the implementation of this function to make any necessary adjustments |
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to the format of the inline text to ensure that it is different from the surrounding |
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text. |
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The second and third parameters enable different parts of the inline text |
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to have different formatting. |
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All implementations of this function need to set the aNumberOfCharactersWithSameFormat |
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parameter. If all of the inline text uses the same formatting then aNumberOfCharactersWithSameFormat |
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should be set to the length of the inline text and the aPositionOfCharacter |
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parameter can be ignored. |
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When the inline text does not all use the same formatting, the second parameter |
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should be set to the number of characters starting at aPositionOfCharacter |
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which have the same formatting: see the following example. |
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Example |
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If the inline text is 7 characters long, the first 4 characters are in format |
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A, the next 2 characters are in format B, and the remaining character is in |
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format C. |
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When the FEP framework (which knows that the inline text is 7 characters long) |
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needs to find out the format of the inline text, it calls GetFormatOfFepInlineText() |
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passing zero into aPositionOfCharacter (to signify the start of the inline |
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text). |
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As the first 4 characters are all in format A, the function should set aFormat |
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to A and it should set aNumberOfCharactersWithSameFormat to 4. As the FEP |
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framework has only been told the format of the first 4 characters, it calls |
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GetFormatOfFepInlineText() again passing 4 into aPositionOfCharacter. As the |
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2 characters starting at position 4 are all in format B, the function should |
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set aFormat to B and it should set aNumberOfCharactersWithSameFormat to 2. |
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The FEP framework still does not know the format of the 7th character so it |
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calls GetFormatOfFepInlineText() a third time passing 6 into aPositionOfCharacter. |
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As the character at position 6 is in format C, the function should set aFormat |
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to C and it should set aNumberOfCharactersWithSameFormat to 1. The FEP framework |
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now knows the format of all of the inline text. |
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@param aFormat On return, contains the formatting to apply to the inline text |
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(or to a portion of it). |
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@param aNumberOfCharactersWithSameFormat On return, contains the number of |
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characters in the inline text (starting at aPositionOfCharacter) which have |
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the same formatting. |
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@param aPositionOfCharacter Start position within the inline text. */ |
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virtual void GetFormatOfFepInlineText(TCharFormat& aFormat, TInt& aNumberOfCharactersWithSameFormat, TInt aPositionOfCharacter) const=0; |
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private: // reserved. do not override! |
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IMPORT_C virtual void MFepInlineTextFormatRetriever_Reserved_1(); |
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IMPORT_C virtual void MFepInlineTextFormatRetriever_Reserved_2(); |
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}; |
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#endif // __FEPITFR_H__ |