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std::string_view

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This commit is contained in:
Jinhao
2018-06-07 18:02:40 +08:00
parent 88d395353e
commit ffee0e5a3b
4 changed files with 165 additions and 16 deletions
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136
source/paint/graphics.cpp
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@@ -465,8 +465,116 @@ namespace paint
{
return detail::text_extent_size(impl_->handle, text.data(), text.length());
}
nana::size graphics::glyph_extent_size(std::wstring_view text, std::size_t begin, std::size_t end) const
{
end = std::clamp(end, static_cast<std::size_t>(0), static_cast<std::size_t>(text.size()));
if (nullptr == impl_->handle || text.empty() || begin >= end) return{};
nana::size sz;
#if defined(NANA_WINDOWS)
int * dx = new int[text.size()];
SIZE extents;
::GetTextExtentExPoint(impl_->handle->context, text.data(), static_cast<int>(text.size()), 0, 0, dx, &extents);
sz.width = dx[end - 1] - (begin ? dx[begin - 1] : 0);
unsigned tab_pixels = impl_->handle->string.tab_length * impl_->handle->string.whitespace_pixels;
const wchar_t * pend = text.data() + end;
for (const wchar_t * p = text.data() + begin; p != pend; ++p)
{
if (*p == '\t')
sz.width += tab_pixels;
}
sz.height = extents.cy;
delete[] dx;
#elif defined(NANA_X11)
sz = text_extent_size(text.substr(begin, end - begin));
#endif
return sz;
}
bool graphics::glyph_pixels(std::wstring_view text, unsigned* pxbuf) const
{
if (nullptr == impl_->handle || nullptr == impl_->handle->context || nullptr == pxbuf) return false;
if (text.empty()) return true;
unsigned tab_pixels = impl_->handle->string.tab_length * impl_->handle->string.whitespace_pixels;
#if defined(NANA_WINDOWS)
int * dx = new int[text.size()];
SIZE extents;
::GetTextExtentExPoint(impl_->handle->context, text.data(), static_cast<int>(text.size()), 0, 0, dx, &extents);
pxbuf[0] = (text[0] == '\t' ? tab_pixels : dx[0]);
for (std::size_t i = 1; i < text.size(); ++i)
{
pxbuf[i] = (text[i] == '\t' ? tab_pixels : dx[i] - dx[i - 1]);
}
delete[] dx;
#elif defined(NANA_X11) && defined(NANA_USE_XFT)
auto disp = nana::detail::platform_spec::instance().open_display();
auto xft = reinterpret_cast<XftFont*>(impl_->handle->font->native_handle());
XGlyphInfo extents;
for (std::size_t i = 0; i < len; ++i)
{
if (text[i] != '\t')
{
FT_UInt glyphs = ::XftCharIndex(disp, xft, text[i]);
::XftGlyphExtents(disp, xft, &glyphs, 1, &extents);
pxbuf[i] = extents.xOff;
}
else
pxbuf[i] = tab_pixels;
}
#endif
return true;
}
std::unique_ptr<unsigned[]> graphics::glyph_pixels(std::wstring_view text) const
{
if (nullptr == impl_->handle || nullptr == impl_->handle->context) return {};
if (text.empty()) return std::unique_ptr<unsigned[]>{new unsigned[1]};
unsigned tab_pixels = impl_->handle->string.tab_length * impl_->handle->string.whitespace_pixels;
#if defined(NANA_WINDOWS)
int * dx = new int[text.size()];
SIZE extents;
::GetTextExtentExPoint(impl_->handle->context, text.data(), static_cast<int>(text.size()), 0, 0, dx, &extents);
auto pxbuf = std::unique_ptr<unsigned[]>{ new unsigned[text.size()] };
pxbuf[0] = (text[0] == '\t' ? tab_pixels : dx[0]);
for (std::size_t i = 1; i < text.size(); ++i)
{
pxbuf[i] = (text[i] == '\t' ? tab_pixels : dx[i] - dx[i - 1]);
}
delete[] dx;
#elif defined(NANA_X11) && defined(NANA_USE_XFT)
auto disp = nana::detail::platform_spec::instance().open_display();
auto xft = reinterpret_cast<XftFont*>(impl_->handle->font->native_handle());
XGlyphInfo extents;
for (std::size_t i = 0; i < len; ++i)
{
if (text[i] != '\t')
{
FT_UInt glyphs = ::XftCharIndex(disp, xft, text[i]);
::XftGlyphExtents(disp, xft, &glyphs, 1, &extents);
pxbuf[i] = extents.xOff;
}
else
pxbuf[i] = tab_pixels;
}
#endif
return pxbuf;
}
#else
::nana::size graphics::text_extent_size(const ::std::string& text) const
{
@@ -498,11 +606,10 @@ namespace paint
{
return detail::text_extent_size(impl_->handle, str.c_str(), len);
}
#endif
nana::size graphics::glyph_extent_size(const wchar_t * str, std::size_t len, std::size_t begin, std::size_t end) const
{
if(len < end) end = len;
if (len < end) end = len;
if (nullptr == impl_->handle || nullptr == str || 0 == len || begin >= end) return{};
nana::size sz;
@@ -513,13 +620,13 @@ namespace paint
sz.width = dx[end - 1] - (begin ? dx[begin - 1] : 0);
unsigned tab_pixels = impl_->handle->string.tab_length * impl_->handle->string.whitespace_pixels;
const wchar_t * pend = str + end;
for(const wchar_t * p = str + begin; p != pend; ++p)
for (const wchar_t * p = str + begin; p != pend; ++p)
{
if(*p == '\t')
if (*p == '\t')
sz.width += tab_pixels;
}
sz.height = extents.cy;
delete [] dx;
delete[] dx;
#elif defined(NANA_X11)
sz = text_extent_size(str + begin, end - begin);
#endif
@@ -533,8 +640,8 @@ namespace paint
bool graphics::glyph_pixels(const wchar_t * str, std::size_t len, unsigned* pxbuf) const
{
if(nullptr == impl_->handle || nullptr == impl_->handle->context || nullptr == str || nullptr == pxbuf) return false;
if(len == 0) return true;
if (nullptr == impl_->handle || nullptr == impl_->handle->context || nullptr == str || nullptr == pxbuf) return false;
if (len == 0) return true;
unsigned tab_pixels = impl_->handle->string.tab_length * impl_->handle->string.whitespace_pixels;
#if defined(NANA_WINDOWS)
@@ -542,22 +649,22 @@ namespace paint
SIZE extents;
::GetTextExtentExPoint(impl_->handle->context, str, static_cast<int>(len), 0, 0, dx, &extents);
pxbuf[0] = (str[0] == '\t' ? tab_pixels : dx[0]);
pxbuf[0] = (str[0] == '\t' ? tab_pixels : dx[0]);
for(std::size_t i = 1; i < len; ++i)
for (std::size_t i = 1; i < len; ++i)
{
pxbuf[i] = (str[i] == '\t' ? tab_pixels : dx[i] - dx[i - 1]);
}
delete [] dx;
delete[] dx;
#elif defined(NANA_X11) && defined(NANA_USE_XFT)
auto disp = nana::detail::platform_spec::instance().open_display();
auto xft = reinterpret_cast<XftFont*>(impl_->handle->font->native_handle());
XGlyphInfo extents;
for(std::size_t i = 0; i < len; ++i)
for (std::size_t i = 0; i < len; ++i)
{
if(str[i] != '\t')
if (str[i] != '\t')
{
FT_UInt glyphs = ::XftCharIndex(disp, xft, str[i]);
::XftGlyphExtents(disp, xft, &glyphs, 1, &extents);
@@ -570,6 +677,9 @@ namespace paint
return true;
}
#endif
nana::size graphics::bidi_extent_size(const std::wstring& str) const
{
nana::size sz;