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Fix crash/assert fail rendering UTF-8 file names w/CHARWRAP (fix #4624)

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This could happen when painting text with CHARWRAP, where we removed
byte by byte from the end of the string, instead of removing (or
adding) well-formed UTF-8 string spans.
This commit is contained in:
David Capello 2024-10-22 16:05:03 -03:00
parent 4c06fbdaf3
commit ed39f40efc
1 changed files with 18 additions and 10 deletions
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28
src/ui/graphics.cpp
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@ -12,6 +12,7 @@
#include "ui/graphics.h"
#include "base/string.h"
#include "base/utf8_decode.h"
#include "gfx/clip.h"
#include "gfx/matrix.h"
#include "gfx/path.h"
@ -491,16 +492,23 @@ gfx::Size Graphics::doUIStringAlgorithm(const std::string& str, gfx::Color fg, g
}
// With char-wrap
else if ((align & CHARWRAP) == CHARWRAP) {
for (end=beg+1; end<str.size(); ++end) {
// If we are out of the available width (rc.w) using the new "end"
if ((rc.w > 0) &&
(m_font->textLength(str.substr(beg, end-beg).c_str()) > rc.w)) {
if (end > beg+1)
--end;
break;
if (rc.w > 0) {
// TODO replace all this with std::string_view in the future
std::string sub(str.substr(beg));
base::utf8_decode it(sub);
std::string progress;
while (!it.is_end()) {
end = beg+(it.pos()-sub.begin());
it.next();
progress = str.substr(beg, end-beg);
// If we are out of the available width (rc.w) using the
// "progress" string.
if (m_font->textLength(progress) > rc.w)
break;
}
}
newBeg = end;
newBeg = std::string::npos;
}
// With word-wrap
else {
@ -512,7 +520,7 @@ gfx::Size Graphics::doUIStringAlgorithm(const std::string& str, gfx::Color fg, g
// we are out of the available width (rc.w) using the new "end"
if ((old_end != std::string::npos) &&
(rc.w > 0) &&
(pt.x+m_font->textLength(str.substr(beg, end-beg).c_str()) > rc.w)) {
(pt.x+m_font->textLength(str.substr(beg, end-beg)) > rc.w)) {
// We go back to the "old_end" and paint from "beg" to "end"
end = old_end;
break;
@ -542,7 +550,7 @@ gfx::Size Graphics::doUIStringAlgorithm(const std::string& str, gfx::Color fg, g
line = str.substr(beg);
gfx::Size lineSize(
m_font->textLength(line.c_str()),
m_font->textLength(line),
m_font->height()+lineSeparation);
calculatedSize.w = std::max(calculatedSize.w, lineSize.w);