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Rewrite linebreaking algorithm. 

Previous version was overly simplistic to deal correctly
with multiple spaces or textruns not separated by spaces.

Fixes https://gitlab.com/kicad/code/kicad/issues/14683
This commit is contained in:
Jeff Young 2023-05-05 22:31:29 +01:00
parent 51fd7ca5ed
commit 995388fb71
1 changed files with 66 additions and 28 deletions
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94
common/font/font.cpp
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@ -39,6 +39,7 @@
// The "official" name of the building Kicad stroke font (always existing)
#include <font/kicad_font_name.h>
#include "macros.h"
#include "wx/tokenzr.h"
// markup_parser.h includes pegtl.hpp which includes windows.h... which leaks #define DrawText
@ -512,20 +513,22 @@ void wordbreakMarkup( std::vector<std::pair<wxString, int>>* aWords,
}
else
{
wxString textRun = aNode->asWxString();
wxArrayString words;
wxString textRun = aNode->asWxString();
wxStringTokenizer tokenizer( textRun, " ", wxTOKEN_RET_DELIMS );
std::vector<wxString> words;
wxStringSplit( textRun, words, ' ' );
while( tokenizer.HasMoreTokens() )
words.emplace_back( tokenizer.GetNextToken() );
if( textRun.EndsWith( wxS( " " ) ) )
words.Add( wxS( " " ) );
for( size_t ii = 0; ii < words.size(); ++ii )
for( const wxString& word : words )
{
int w = aFont->GetTextAsGlyphs( nullptr, nullptr, words[ii], aSize, { 0, 0 },
wxString chars = word;
chars.Trim();
int w = aFont->GetTextAsGlyphs( nullptr, nullptr, chars, aSize, { 0, 0 },
ANGLE_0, false, { 0, 0 }, textStyle ).x;
aWords->emplace_back( std::make_pair( words[ii], w ) );
aWords->emplace_back( std::make_pair( word, w ) );
}
}
}
@ -577,35 +580,70 @@ void FONT::LinebreakText( wxString& aText, int aColumnWidth, const VECTOR2I& aSi
for( size_t ii = 0; ii < textLines.Count(); ++ii )
{
bool virginLine = true;
int lineWidth = 0;
std::vector<std::pair<wxString, int>> markup;
std::vector<std::pair<wxString, int>> words;
wordbreakMarkup( &words, textLines[ii], aSize, textStyle );
wordbreakMarkup( &markup, textLines[ii], aSize, textStyle );
for( size_t jj = 0; jj < words.size(); /* advance in loop */ )
for( const auto& [ run, runWidth ] : markup )
{
if( virginLine )
if( !words.empty() && !words.back().first.EndsWith( ' ' ) )
{
// First word is always placed, even when wider than columnWidth.
aText += words[jj].first;
lineWidth += words[jj].second;
jj++;
virginLine = false;
}
else if( lineWidth + spaceWidth + words[jj].second < aColumnWidth - aThickness )
{
aText += " " + words[jj].first;
lineWidth += spaceWidth + words[jj].second;
jj++;
words.back().first += run;
words.back().second += runWidth;
}
else
{
aText += '\n';
words.emplace_back( std::make_pair( run, runWidth ) );
}
}
bool buryMode = false;
int lineWidth = 0;
wxString pendingSpaces;
for( const auto& [ word, wordWidth ] : words )
{
int pendingSpaceWidth = (int) pendingSpaces.Length() * spaceWidth;
bool overflow = lineWidth + pendingSpaceWidth + wordWidth > aColumnWidth - aThickness;
if( overflow && pendingSpaces.Length() > 0 )
{
aText += '\n';
lineWidth = 0;
virginLine = true;
pendingSpaces = wxEmptyString;
pendingSpaceWidth = 0;
buryMode = true;
}
if( word == wxS( " " ) )
{
pendingSpaces += word;
}
else
{
if( buryMode )
{
buryMode = false;
}
else
{
aText += pendingSpaces;
lineWidth += pendingSpaceWidth;
}
if( word.EndsWith( ' ' ) )
{
aText += word.Left( word.Length() - 1 );
pendingSpaces = wxS( " " );
}
else
{
aText += word;
pendingSpaces = wxEmptyString;
}
lineWidth += wordWidth;
}
}