mewin/nana
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

refactor text_renderer

Browse Source
This commit is contained in:
Jinhao 2019-06-20 04:35:29 +08:00
parent ad4c3a3fc3
commit 8a0475c98c
9 changed files with 170 additions and 150 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/nana/gui/widgets/listbox.hpp
View File

@ -1219,7 +1219,6 @@ namespace nana
unsigned min_column_width{ 20 }; ///< def=20 . non counting suspension_width
unsigned suspension_width{ 8 }; ///< def= . the trigger will set this to the width if ("...")
unsigned text_margin{ 5 }; ///< def= 5. Additional or extended with added (before) to the text width to determine the cell width. cell_w = text_w + ext_w +1
unsigned item_height_ex{ 6 }; ///< Set !=0 !!!! def=6. item_height = text_height + item_height_ex
@ -1603,6 +1602,8 @@ the nana::detail::basic_window member pointer scheme
* It returns true to deselect the selected items. It returns false to cancel to deselect the selected items.
*/
void set_deselect(std::function<bool(nana::mouse)> predicate);
unsigned suspension_width() const;
private:
drawerbase::listbox::essence & _m_ess() const;
nana::any* _m_anyobj(size_type cat, size_type index, bool allocate_if_empty) const override;

12
include/nana/paint/text_renderer.hpp
View File

@ -10,14 +10,20 @@ namespace nana
{
public:
using graph_reference = graphics &;
enum class mode
{
truncate_with_ellipsis,
truncate_letter_with_ellipsis,
word_wrap
};
text_renderer(graph_reference graph, align = align::left);
nana::size extent_size(int x, int y, const wchar_t*, std::size_t len, unsigned restricted_pixels) const;
nana::size extent_size(int x, int y, const wchar_t*, std::size_t len, unsigned space_pixels) const;
void render(const point&, const wchar_t*, std::size_t len);
void render(const point&, const wchar_t*, std::size_t len, unsigned restricted_pixels, bool omitted);
void render(const point&, const wchar_t*, std::size_t len, unsigned restricted_pixels);
void render(const point&, const wchar_t*, std::size_t len, unsigned space_pixels, mode);
private:
graph_reference graph_;
align text_align_;

2
source/gui/place_parts.hpp
View File

@ -140,7 +140,7 @@ namespace nana
//draw caption
auto text = to_wstring(API::window_caption(window_handle_));
text_rd_->render({ 3, 1 }, text.data(), text.size(), graph.size().width - 20, true);
text_rd_->render({ 3, 1 }, text.data(), text.size(), graph.size().width - 20, paint::text_renderer::mode::truncate_with_ellipsis);
//draw x button
auto r = _m_button_area();

6
source/gui/widgets/button.cpp
View File

@ -261,7 +261,7 @@ namespace nana{ namespace drawerbase
graph.palette(true, text_color);
if (attr_.omitted)
tr.render(pos, txtptr, txtlen, omitted_pixels, true);
tr.render(pos, txtptr, txtlen, omitted_pixels, paint::text_renderer::mode::truncate_with_ellipsis);
else
#ifdef _nana_std_has_string_view
graph.bidi_string(pos, { txtptr, txtlen });
@ -276,9 +276,9 @@ namespace nana{ namespace drawerbase
graph.palette(true, color{ colors::white });
if(attr_.omitted)
{
tr.render(point{ pos.x + 1, pos.y + 1 }, txtptr, txtlen, omitted_pixels, true);
tr.render(point{ pos.x + 1, pos.y + 1 }, txtptr, txtlen, omitted_pixels, paint::text_renderer::mode::truncate_with_ellipsis);
graph.palette(true, color{ colors::gray });
tr.render(pos, txtptr, txtlen, omitted_pixels, true);
tr.render(pos, txtptr, txtlen, omitted_pixels, paint::text_renderer::mode::truncate_with_ellipsis);
}
else
{

4
source/gui/widgets/checkbox.cpp
View File

@ -70,13 +70,13 @@ namespace nana{ namespace drawerbase
if (!wdg->enabled())
{
graph.palette(true, colors::white);
tr.render({ 17 + interval, 2 }, title.c_str(), title.length(), pixels);
tr.render({ 17 + interval, 2 }, title.c_str(), title.length(), pixels, paint::text_renderer::mode::word_wrap);
graph.palette(true, static_cast<color_rgb>(0x808080));
}
else
graph.palette(true, wdg->fgcolor());
tr.render({ 16 + interval, 1 }, title.c_str(), title.length(), pixels);
tr.render({ 16 + interval, 1 }, title.c_str(), title.length(), pixels, paint::text_renderer::mode::word_wrap);
}
//draw crook

15
source/gui/widgets/listbox.cpp
View File

@ -2059,6 +2059,11 @@ namespace nana
};
}
unsigned suspension_width() const
{
return (graph ? graph->text_extent_size(L"...").width : 0);
}
bool cs_status(index_pair abs_pos, bool for_selection) const
{
if (abs_pos.is_category())
@ -3352,7 +3357,7 @@ namespace nana
else
{
//Default scheme
new_w = (std::max)(new_w, essence_->scheme_ptr->suspension_width + essence_->scheme_ptr->min_column_width);
new_w = (std::max)(new_w, essence_->suspension_width() + essence_->scheme_ptr->min_column_width);
}
if(col.width_px != new_w)
@ -3997,6 +4002,7 @@ namespace nana
if (draw_column)
{
//Draw item text
paint::aligner text_aligner{*graph, col.alignment};
unsigned text_margin_right = 0;
@ -4142,7 +4148,6 @@ namespace nana
if (graph.text_metrics(as, ds, il))
essence_->text_height = as + ds;
essence_->scheme_ptr->suspension_width = graph.text_extent_size("...").width;
essence_->calc_content_size(true);
}
@ -6114,6 +6119,12 @@ namespace nana
_m_ess().pred_msup_deselect = std::move(predicate);
}
unsigned listbox::suspension_width() const
{
nana::internal_scope_guard lock;
return _m_ess().suspension_width();
}
drawerbase::listbox::essence & listbox::_m_ess() const
{
return get_drawer_trigger().ess();

2
source/gui/widgets/menu.cpp
View File

@ -147,7 +147,7 @@ namespace nana
nana::paint::text_renderer tr(graph);
auto wstr = to_wstring(text);
tr.render(pos, wstr.c_str(), wstr.length(), text_pixels, true);
tr.render(pos, wstr.c_str(), wstr.length(), text_pixels, paint::text_renderer::mode::truncate_with_ellipsis);
}
void sub_arrow(graph_reference graph, const nana::point& pos, unsigned pixels, const attr&)

2
source/gui/widgets/tabbar.cpp
View File

@ -1050,7 +1050,7 @@ namespace nana
std::wstring wtext = to_wstring(item.text);
tr.render({ m.r.x + 24, m.r.y + static_cast<int>(m.r.height - ts.height) / 2 },
wtext.c_str(), wtext.length(), basis_.item_pixels - 24 - 18, true);
wtext.c_str(), wtext.length(), basis_.item_pixels - 24 - 18, paint::text_renderer::mode::truncate_with_ellipsis);
}
}

274
source/paint/text_renderer.cpp
View File

@ -46,6 +46,7 @@ namespace nana
}
}
unsigned operator()(const int top, const wchar_t * buf, std::size_t bufsize)
{
auto const drawable = graph_.handle();
@ -66,7 +67,7 @@ namespace nana
auto text_align = text_align_;
// Checks if ellipsis is enabled and the total pixels of string is larger than the space.
if (ellipsis_px_ && (string_px > static_cast<int>(right_ - left_)))
if (ellipsis_px_ && (static_cast<int>(string_px) > right_ - left_))
{
//The string should be drawn from left most point no matter what text align is.
text_align = align::left;
@ -99,7 +100,7 @@ namespace nana
dummy.bitblt(r, graph_, pos);
#ifdef _nana_std_has_string_view
dummy.string({}, { ent.begin, ent.end - ent.begin }, graph_.palette(true));
dummy.string({}, { ent.begin, static_cast<unsigned>(ent.end - ent.begin) }, graph_.palette(true));
#else
dummy.palette(true, graph_.palette(true));
dummy.string({}, ent.begin, ent.end - ent.begin);
@ -151,46 +152,54 @@ namespace nana
struct draw_string_auto_changing_lines
{
graphics & graph;
int x, endpos;
align text_align;
const int left, right;
const align text_align;
draw_string_auto_changing_lines(graphics& graph, int x, int endpos, align ta)
: graph(graph), x(x), endpos(endpos), text_align(ta)
draw_string_auto_changing_lines(graphics& graph, int left, int right, align ta):
graph(graph),
left(left),
right(right),
text_align(ta)
{}
unsigned operator()(const int top, const wchar_t * buf, std::size_t bufsize)
{
unsigned pixels = 0;
unsigned return_max_height = 0;
auto const dw = graph.handle();
unsigned str_w = 0;
auto const drawable = graph.handle();
unsigned string_px = 0;
std::vector<nana::size> ts_keeper;
std::vector<nana::size> word_metrics;
auto const reordered = unicode_reorder(buf, bufsize);
for(auto & i : reordered)
{
nana::size ts = detail::text_extent_size(dw, i.begin, i.end - i.begin);
if(ts.height > pixels) pixels = ts.height;
ts_keeper.emplace_back(ts);
str_w += ts.width;
auto word_sz = detail::text_extent_size(drawable, i.begin, i.end - i.begin);
word_metrics.emplace_back(word_sz);
string_px += word_sz.width;
if (return_max_height < word_sz.height)
return_max_height = word_sz.height;
}
const nana::size* wdm = word_metrics.data();
//Test whether the text needs the new line.
if(x + static_cast<int>(str_w) > endpos)
if(left + static_cast<int>(string_px) > right)
{
pixels = 0;
unsigned line_pixels = 0;
nana::point pos{ x, top };
int orig_top = top;
auto i_ts_keeper = ts_keeper.cbegin();
unsigned max_height = 0;
nana::point pos{ left, top };
const int orig_top = top;
for(auto & i : reordered)
{
if(line_pixels < i_ts_keeper->height)
line_pixels = i_ts_keeper->height;
if(max_height < wdm->height)
max_height = wdm->height;
bool beyond_edge = (pos.x + static_cast<int>(i_ts_keeper->width) > endpos);
bool beyond_edge = (pos.x + static_cast<int>(wdm->width) > right);
if(beyond_edge)
{
const std::size_t len = i.end - i.begin;
@ -210,10 +219,10 @@ namespace nana
{
auto pxbuf = pixel_buf.get();
idx_splitted = find_splitted(idx_head, len, pos.x, endpos, pxbuf);
idx_splitted = find_splitted(idx_head, len, pos.x, right, pxbuf);
if(idx_splitted == len)
{
detail::draw_string(dw, pos, i.begin + idx_head, idx_splitted - idx_head);
detail::draw_string(drawable, pos, i.begin + idx_head, idx_splitted - idx_head);
for(std::size_t i = idx_head; i < len; ++i)
pos.x += static_cast<int>(pxbuf[i]);
@ -223,17 +232,16 @@ namespace nana
//Check the word whether it is splittable.
if(splittable(i.begin, idx_splitted))
{
detail::draw_string(dw, pos, i.begin + idx_head, idx_splitted - idx_head);
detail::draw_string(drawable, pos, i.begin + idx_head, idx_splitted - idx_head);
idx_head = idx_splitted;
pos.x = x;
pos.y += static_cast<int>(line_pixels);
line_pixels = i_ts_keeper->height;
pos.x = left;
pos.y += static_cast<int>(max_height);
}
else
{
//Search the splittable character from idx_head to idx_splitted
const wchar_t * u = i.begin + idx_splitted;
const wchar_t * head = i.begin + idx_head;
const wchar_t * const head = i.begin + idx_head;
for(; head < u; --u)
{
@ -243,98 +251,94 @@ namespace nana
if(u != head)
{
detail::draw_string(dw, pos, head, u - head);
detail::draw_string(drawable, pos, head, u - head);
idx_head += u - head;
pos.x = x;
pos.y += static_cast<int>(line_pixels);
line_pixels = i_ts_keeper->height;
pos.x = left;
pos.y += static_cast<int>(max_height);
}
else
{
u = i.begin + idx_splitted;
const wchar_t * end = i.begin + len;
for(; u < end; ++u)
for(; u < i.begin + len; ++u)
{
if(splittable(head, u - head))
break;
}
std::size_t splen = u - head;
pos.y += static_cast<int>(line_pixels);
pos.x = x;
detail::draw_string(dw, pos, head, splen);
line_pixels = i_ts_keeper->height;
pos.y += static_cast<int>(max_height);
pos.x = left;
detail::draw_string(drawable, pos, head, splen);
for(std::size_t k = idx_head; k < idx_head + splen; ++k)
pos.x += static_cast<int>(pxbuf[k]);
if (pos.x >= endpos)
if (pos.x >= right)
{
pos.x = x;
pos.y += static_cast<int>(line_pixels);
pos.x = left;
pos.y += static_cast<int>(wdm->height);
}
idx_head += splen;
}
}
max_height = wdm->height;
}while(idx_head < len);
}
else
{
pos.x = x;
pos.y += static_cast<int>(line_pixels);
detail::draw_string(dw, pos, i.begin, 1);
pos.x += static_cast<int>(i_ts_keeper->width);
pos.x = left;
pos.y += static_cast<int>(max_height);
detail::draw_string(drawable, pos, i.begin, 1);
pos.x += static_cast<int>(wdm->width);
}
line_pixels = 0;
max_height = 0;
}
else
{
detail::draw_string(dw, pos, i.begin, i.end - i.begin);
pos.x += static_cast<int>(i_ts_keeper->width);
detail::draw_string(drawable, pos, i.begin, i.end - i.begin);
pos.x += static_cast<int>(wdm->width);
}
++i_ts_keeper;
++wdm;
}
pixels = (top - orig_top) + line_pixels;
return_max_height = (top - orig_top) + max_height;
}
else
{
point pos{ left, top };
//The text could be drawn in a line.
if((align::left == text_align) || (align::center == text_align))
{
point pos{ x, top };
if(align::center == text_align)
pos.x += (endpos - x - static_cast<int>(str_w)) / 2;
auto i_ts_keeper = ts_keeper.cbegin();
pos.x += (right - left - static_cast<int>(string_px)) / 2;
for(auto & ent : reordered)
{
const nana::size & ts = *i_ts_keeper;
if (pos.x + static_cast<int>(wdm->width) > 0)
detail::draw_string(drawable, pos, ent.begin, ent.end - ent.begin);
if (pos.x + static_cast<int>(ts.width) > 0)
detail::draw_string(dw, pos, ent.begin, ent.end - ent.begin);
pos.x += static_cast<int>(ts.width);
++i_ts_keeper;
pos.x += static_cast<int>(wdm->width);
++wdm;
}
}
else if(align::right == text_align)
{
point pos{ endpos, top };
auto i_ts_keeper = ts_keeper.crbegin();
pos.x = right;
for(auto i = reordered.crbegin(); i != reordered.crend(); ++i)
{
if (pos.x < 0)
break;
auto & ent = *i;
std::size_t len = ent.end - ent.begin;
const nana::size & ts = *i_ts_keeper;
pos.x -= static_cast<int>(ts.width);
if (pos.x >= 0)
detail::draw_string(dw, pos, ent.begin, len);
++i_ts_keeper;
pos.x -= static_cast<int>(wdm->width);
detail::draw_string(drawable, pos, ent.begin, len);
++wdm;
}
}
}
return pixels;
return return_max_height;
}
static std::size_t find_splitted(std::size_t begin, std::size_t end, int x, int endpos, unsigned * pxbuf)
@ -370,44 +374,53 @@ namespace nana
struct extent_auto_changing_lines
{
graphics & graph;
int x, endpos;
const int left, right;
unsigned extents;
extent_auto_changing_lines(graphics& graph, int x, int endpos)
: graph(graph), x(x), endpos(endpos), extents(0)
extent_auto_changing_lines(graphics& graph, int left, int right):
graph(graph),
left(left),
right(right),
extents(0)
{}
unsigned operator()(int top, const wchar_t * buf, std::size_t bufsize)
{
unsigned pixels = 0;
unsigned return_max_height = 0;
drawable_type dw = graph.handle();
unsigned str_w = 0;
std::vector<nana::size> ts_keeper;
auto drawable = graph.handle();
std::vector<nana::size> word_metrics;
unsigned string_px = 0;
auto const reordered = unicode_reorder(buf, bufsize);
for(auto & i : reordered)
{
nana::size ts = detail::text_extent_size(dw, i.begin, i.end - i.begin);
ts_keeper.emplace_back(ts);
str_w += ts.width;
auto word_sz = detail::text_extent_size(drawable, i.begin, i.end - i.begin);
word_metrics.emplace_back(word_sz);
string_px += word_sz.width;
if (return_max_height < word_sz.height)
return_max_height = word_sz.height;
}
auto i_ts_keeper = ts_keeper.cbegin();
//Test whether the text needs the new line.
if(x + static_cast<int>(str_w) > endpos)
if(left + static_cast<int>(string_px) > right)
{
unsigned line_pixels = 0;
int xpos = x;
int orig_top = top;
unsigned max_height = 0;
int xpos = left;
const int orig_top = top;
auto wdm = word_metrics.data();
for(auto & i : reordered)
{
if(line_pixels < i_ts_keeper->height)
line_pixels = i_ts_keeper->height;
if(max_height < wdm->height)
max_height = wdm->height;
bool beyond_edge = (xpos + static_cast<int>(i_ts_keeper->width) > endpos);
bool beyond_edge = (xpos + static_cast<int>(wdm->width) > right);
if(beyond_edge)
{
std::size_t len = i.end - i.begin;
@ -427,7 +440,7 @@ namespace nana
do
{
idx_splitted = draw_string_auto_changing_lines::find_splitted(idx_head, len, xpos, endpos, pxbuf);
idx_splitted = draw_string_auto_changing_lines::find_splitted(idx_head, len, xpos, right, pxbuf);
if(idx_splitted == len)
{
@ -440,9 +453,9 @@ namespace nana
if(draw_string_auto_changing_lines::splittable(i.begin, idx_splitted))
{
idx_head = idx_splitted;
xpos = x;
top += line_pixels;
line_pixels = i_ts_keeper->height;
xpos = left;
top += max_height;
max_height = wdm->height;
}
else
{
@ -456,14 +469,11 @@ namespace nana
break;
}
if(u != head)
{
idx_head += u - head;
xpos = x;
top += line_pixels;
line_pixels = i_ts_keeper->height;
}
else
xpos = left;
top += max_height;
max_height = wdm->height;
if(u == head)
{
u = i.begin + idx_splitted;
const wchar_t * end = i.begin + len;
@ -473,52 +483,45 @@ namespace nana
break;
}
std::size_t splen = u - head;
top += line_pixels;
xpos = x;
line_pixels = i_ts_keeper->height;
for(std::size_t k = idx_head; k < idx_head + splen; ++k)
xpos += static_cast<int>(pxbuf[k]);
if(xpos >= endpos)
if(xpos >= right)
{
xpos = x;
top += line_pixels;
xpos = left;
top += max_height;
}
idx_head += splen;
}
else
idx_head += u - head;
}
}while(idx_head < len);
}
else
xpos = x + static_cast<int>(i_ts_keeper->width);
xpos = left + static_cast<int>(wdm->width);
line_pixels = 0;
max_height = 0;
}
else
xpos += static_cast<int>(i_ts_keeper->width);
xpos += static_cast<int>(wdm->width);
++i_ts_keeper;
++wdm;
}
pixels = (top - orig_top) + line_pixels;
return_max_height = (top - orig_top) + max_height;
}
else
{
while(i_ts_keeper != ts_keeper.cend())
{
const nana::size & ts = *(i_ts_keeper++);
if(ts.height > pixels) pixels = ts.height;
}
}
extents += pixels;
return pixels;
extents += return_max_height;
return return_max_height;
}
};
}//end namespace helper
//class text_renderer
text_renderer::text_renderer(graph_reference graph, align ta)
: graph_(graph), text_align_(ta)
text_renderer::text_renderer(graph_reference graph, align ta):
graph_(graph),
text_align_(ta)
{}
nana::size text_renderer::extent_size(int x, int y, const wchar_t* str, std::size_t len, unsigned restricted_pixels) const
@ -538,26 +541,25 @@ namespace nana
{
if (graph_)
{
helper::string_drawer sd{ graph_, pos.x, static_cast<int>(graph_.width()), text_align_, false };
helper::string_drawer sd{ graph_, pos.x, pos.x + static_cast<int>(graph_.width()), text_align_, false };
helper::for_each_line(str, len, pos.y, sd);
}
}
void text_renderer::render(const point& pos, const wchar_t* str, std::size_t len, unsigned restricted_pixels, bool omitted)
void text_renderer::render(const point& pos, const wchar_t* str, std::size_t len, unsigned space_pixels, mode rendering_mode)
{
if (graph_)
if (graph_ && str && len && space_pixels)
{
helper::string_drawer sd{ graph_, pos.x, pos.x + static_cast<int>(restricted_pixels), text_align_, omitted };
helper::for_each_line(str, len, pos.y, sd);
}
}
void text_renderer::render(const point& pos, const wchar_t * str, std::size_t len, unsigned restricted_pixels)
{
if (graph_)
{
helper::draw_string_auto_changing_lines dsacl(graph_, pos.x, pos.x + static_cast<int>(restricted_pixels), text_align_);
helper::for_each_line(str, len, pos.y, dsacl);
if (mode::truncate_letter_with_ellipsis == rendering_mode || mode::truncate_with_ellipsis == rendering_mode)
{
helper::string_drawer sd{ graph_, pos.x, pos.x + static_cast<int>(space_pixels), text_align_, true };
helper::for_each_line(str, len, pos.y, sd);
}
else if (mode::word_wrap == rendering_mode)
{
helper::draw_string_auto_changing_lines dsacl(graph_, pos.x, pos.x + static_cast<int>(space_pixels), text_align_);
helper::for_each_line(str, len, pos.y, dsacl);
}
}
}
//end class text_renderer