09da7fd9ce
Commit a9f3c11375 (tdf#162002 DOCX import:
ignore subsetted embedded fonts for editing, 2024-07-12) decided to
ignore all subsetted fonts for editing, improve this a little so we only
ignore subsetted fonts when they can't even provide an English alphabet
in any form (lowercase, uppercase).
This avoids the possible problem that a font is marked as subsetted but
it's good enough in practice and we would still throw it away for
editing.
Change-Id: I0bc0e14ffc0c039f029220991bd16d9e3254f059
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170570
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins
111 lines
3.9 KiB
C++
111 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_VCL_EMBEDDEDFONTSHELPER_HXX
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#define INCLUDED_VCL_EMBEDDEDFONTSHELPER_HXX
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#include <vcl/dllapi.h>
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#include <rtl/ustring.hxx>
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#include <tools/fontenum.hxx>
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#include <tools/long.hxx>
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#include <string_view>
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#include <vector>
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namespace com::sun::star::io { class XInputStream; }
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namespace com::sun::star::uno { template <typename > class Reference; }
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/**
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Helper functions for handling embedded fonts in documents.
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*/
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class VCL_DLLPUBLIC EmbeddedFontsHelper
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{
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private:
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std::vector<std::pair<OUString, OUString>> m_aAccumulatedFonts;
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/**
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Adds the given font to the list of known fonts. The font is used only until application
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exit.
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@param fontName name of the font (e.g. 'Times New Roman')
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@param fileUrl URL of the font file
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*/
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static void activateFont( const OUString& fontName, const OUString& fileUrl );
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public:
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/// Specification of what kind of operation is allowed when embedding a font
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enum class FontRights
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{
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ViewingAllowed, ///< Font may be embedded for viewing the document (but not editing)
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EditingAllowed ///< Font may be embedded for editing document (implies viewing)
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};
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/**
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Returns URL for a font file for the given font, or empty if it does not exist.
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*/
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static OUString fontFileUrl(
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std::u16string_view familyName, FontFamily family, FontItalic italic,
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FontWeight weight, FontPitch pitch, FontRights rights );
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/**
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Reads a font from the input stream, saves it to a temporary font file and adds it to the list of
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fonts that activateFonts will activate.
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@param stream stream of font data
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@param fontName name of the font (e.g. 'Times New Roman')
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@param extra additional text to use for name (e.g. to distinguish regular from bold, italic,...), "?" for unique
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@param key key to xor the data with, from the start until the key's length (not repeated)
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@param eot whether the data is compressed in Embedded OpenType format
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*/
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bool addEmbeddedFont( const css::uno::Reference< css::io::XInputStream >& stream,
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const OUString& fontName, std::u16string_view extra,
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std::vector< unsigned char > const & key, bool eot = false,
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bool bSubsetted = false);
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/**
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Returns a URL for a file where to store contents of a given temporary font.
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The file may or not may not exist yet, and will be cleaned up automatically as appropriate.
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Use activateTemporaryFont() to actually enable usage of the font.
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@param fontName name of the font (e.g. 'Times New Roman')
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@param extra additional text to use for name (e.g. to distinguish regular from bold, italic,...), "?" for unique
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*/
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static OUString fileUrlForTemporaryFont( const OUString& fontName, std::u16string_view extra );
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/**
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Adds the accumulated fonts to the list of known fonts. The fonts are used only until application
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exit.
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*/
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void activateFonts();
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/**
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Returns if the restrictions specified in the font (if present) allow embedding
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the font for a particular purpose.
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@param data font data
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@param size size of the font data
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@param rights type of operation to be allowed for the font
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*/
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static bool sufficientTTFRights( const void* data, tools::Long size, FontRights rights );
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/**
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Removes all temporary fonts in the path used by fileUrlForTemporaryFont().
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@internal
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*/
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static void clearTemporaryFontFiles();
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~EmbeddedFontsHelper() COVERITY_NOEXCEPT_FALSE
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{
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activateFonts();
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}
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};
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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