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#include "clMarkdownRenderer.hpp"
#include "ColoursAndFontsManager.h"
#include "clSystemSettings.h"
#include "drawingutils.h"
#include "file_logger.h"
#include "mdparser.hpp"
#include "wx/settings.h"
namespace
{
struct DCFontLocker {
wxDC& m_dc;
wxFont m_old_font;
DCFontLocker(wxDC& dc)
: m_dc(dc)
, m_old_font(dc.GetFont())
{
}
~DCFontLocker() { m_dc.SetFont(m_old_font); }
};
} // namespace
void clMarkdownRenderer::UpdateFont(wxDC& dc, const mdparser::Style& style)
{
// we always use code font, so we dont change it
wxFont f = dc.GetFont();
double point_size = f.GetPointSize();
switch(style.font_size) {
case mdparser::Style::FONTSIZE_H1:
point_size += 4; // it will receive a different colour
break;
case mdparser::Style::FONTSIZE_H2:
point_size += 4;
break;
case mdparser::Style::FONTSIZE_H3:
point_size += 2;
break;
default:
break;
}
f.SetPointSize(point_size);
f.SetWeight(style.font_weight == mdparser::Style::FONTWEIGHT_BOLD ? wxFONTWEIGHT_BOLD : wxFONTWEIGHT_NORMAL);
f.SetStyle(style.font_style == mdparser::Style::FONTSTYLE_ITALIC ? wxFONTSTYLE_ITALIC : wxFONTSTYLE_NORMAL);
f.SetStrikethrough(style.font_strikethrough);
dc.SetFont(f);
}
clMarkdownRenderer::clMarkdownRenderer() {}
clMarkdownRenderer::~clMarkdownRenderer() {}
wxSize clMarkdownRenderer::Render(wxWindow* win, wxDC& dc, const wxString& text, const wxRect& rect)
{
return DoRender(win, dc, text, rect, true);
}
wxSize clMarkdownRenderer::DoRender(wxWindow* win, wxDC& dc, const wxString& text, const wxRect& rect, bool do_draw)
{
wxUnusedVar(win);
constexpr int X_MARGIN = 5;
constexpr int Y_MARGIN = 5;
int xx = rect.GetTopLeft().x + X_MARGIN;
int yy = rect.GetTopLeft().y + Y_MARGIN;
wxFont default_font = ColoursAndFontsManager::Get().GetFixedFont(true);
dc.SetFont(default_font);
// clear the area
wxColour pen_colour = clSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW);
wxColour bg_colour = clSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
bool is_dark = DrawingUtils::IsDark(bg_colour); //.GetLuminance() < 128;
if(do_draw) {
wxRect bgRect = rect;
#ifdef __WXMAC__
bgRect.Inflate(1);
#endif
dc.SetPen(pen_colour);
dc.SetBrush(bg_colour);
dc.DrawRectangle(bgRect);
}
int height = X_MARGIN;
int width = Y_MARGIN;
int line_height = wxNOT_FOUND;
auto on_write = [&](const wxString& buffer, const mdparser::Style& style, bool is_eol) {
DCFontLocker font_locker(dc);
if(style.is_horizontal_rule()) {
wxSize text_size = dc.GetTextExtent("Tp");
yy += text_size.GetHeight() / 2;
if(do_draw) {
dc.DrawLine(xx, yy, rect.GetRight() - X_MARGIN, yy);
}
xx = X_MARGIN;
yy += text_size.GetHeight() / 2;
height += text_size.GetHeight();
} else {
UpdateFont(dc, style);
wxSize text_size = dc.GetTextExtent(buffer);
// even if text is empty, we still need to have a valid line height
// so use a dummy "Tp" text for this purpose
line_height = dc.GetTextExtent("Tp").GetHeight();
wxColour code_bg_colour = bg_colour.ChangeLightness(is_dark ? 110 : 150);
wxColour text_colour = clSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
if(style.is_code()) {
text_colour = is_dark ? wxColour("#cc99ff") : wxColour("#cc0000");
} else if(style.has_flag(mdparser::T_H1)) {
text_colour = is_dark ? wxColour("#ff9999") : wxColour("#3399cc");
}
if(do_draw) {
if(style.is_code()) {
wxRect code_rect = wxRect({ xx, yy }, text_size);
dc.SetPen(code_bg_colour);
dc.SetBrush(code_bg_colour);
dc.DrawRoundedRectangle(code_rect, 1.0);
} else if(style.is_codeblock()) {
// colour the entire row
wxRect code_rect = wxRect(0, yy, rect.GetWidth(), line_height);
code_rect.Deflate(1, 0);
dc.SetPen(code_bg_colour);
dc.SetBrush(code_bg_colour);
dc.DrawRectangle(code_rect);
}
dc.SetTextForeground(text_colour);
dc.DrawText(buffer, xx, yy);
}
xx += text_size.GetWidth();
if(is_eol) {
width = wxMax(xx, width);
xx = X_MARGIN;
yy += line_height;
height = yy;
}
}
};
mdparser::Parser parser;
parser.parse(text, on_write);
width = wxMax(width, xx);
height += line_height;
return { width, height };
}
wxSize clMarkdownRenderer::GetSize(wxWindow* win, wxDC& dc, const wxString& text)
{
return DoRender(win, dc, text, {}, false);
}
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