mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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/. */
|
|
|
|
#include "nsComplexBreaker.h"
|
|
|
|
#include <pango/pango-break.h>
|
|
#include "nsUTF8Utils.h"
|
|
#include "nsString.h"
|
|
#include "nsTArray.h"
|
|
|
|
void
|
|
NS_GetComplexLineBreaks(const char16_t* aText, uint32_t aLength,
|
|
uint8_t* aBreakBefore)
|
|
{
|
|
NS_ASSERTION(aText, "aText shouldn't be null");
|
|
|
|
memset(aBreakBefore, false, aLength * sizeof(uint8_t));
|
|
|
|
nsAutoTArray<PangoLogAttr, 2000> attrBuffer;
|
|
if (!attrBuffer.AppendElements(aLength + 1))
|
|
return;
|
|
|
|
NS_ConvertUTF16toUTF8 aUTF8(aText, aLength);
|
|
|
|
const gchar* p = aUTF8.Data();
|
|
const gchar* end = p + aUTF8.Length();
|
|
uint32_t u16Offset = 0;
|
|
|
|
static PangoLanguage* language = pango_language_from_string("en");
|
|
|
|
while (p < end)
|
|
{
|
|
PangoLogAttr* attr = attrBuffer.Elements();
|
|
pango_get_log_attrs(p, end - p, -1, language, attr, attrBuffer.Length());
|
|
|
|
while (p < end)
|
|
{
|
|
aBreakBefore[u16Offset] = attr->is_line_break;
|
|
if (NS_IS_LOW_SURROGATE(aText[u16Offset]))
|
|
aBreakBefore[++u16Offset] = false; // Skip high surrogate
|
|
++u16Offset;
|
|
|
|
bool err;
|
|
uint32_t ch = UTF8CharEnumerator::NextChar(&p, end, &err);
|
|
++attr;
|
|
|
|
if (ch == 0 || err) {
|
|
// pango_break (pango 1.16.2) only analyses text before the
|
|
// first NUL (but sets one extra attr). Workaround loop to call
|
|
// pango_break again to analyse after the NUL is done somewhere else
|
|
// (gfx/thebes/gfxFontconfigFonts.cpp: SetupClusterBoundaries()).
|
|
// So, we do the same here for pango_get_log_attrs.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|