libtxt: fix a bug that used incorrect buffer size depending on condit…

…ions (flutter#5804)

* libtxt: fix a bug that used incorrect buffer size depending on conditions

* Update AUTHORS

* clang-format

AUTHORS

@@ -11,3 +11,4 @@ Dan Field <[email protected]>
 Victor Choueiri <[email protected]>
 Simon Lightfoot <[email protected]>
 Dwayne Slater <[email protected]>
+Tetsuhiro Ueda <[email protected]>

third_party/txt/src/txt/paragraph.cc

@@ -504,6 +504,7 @@ void Paragraph::Layout(double width, bool force) {
       uint16_t* text_ptr = text_.data();
       size_t text_start = run.start();
       size_t text_count = run.end() - run.start();
+      size_t text_size = text_.size();
 
       // Apply ellipsizing if the run was not completely laid out and this
       // is the last line (or lines are unlimited).
@@ -541,6 +542,7 @@ void Paragraph::Layout(double width, bool force) {
         text_ptr = ellipsized_text.data();
         text_start = 0;
         text_count = ellipsized_text.size();
+        text_size = text_count;
 
         // If there is no line limit, then skip all lines after the ellipsized
         // line.
@@ -550,9 +552,8 @@ void Paragraph::Layout(double width, bool force) {
         }
       }
 
-      layout.doLayout(text_ptr, text_start, text_count, text_.size(),
-                      run.is_rtl(), font, minikin_paint,
-                      minikin_font_collection);
+      layout.doLayout(text_ptr, text_start, text_count, text_size, run.is_rtl(),
+                      font, minikin_paint, minikin_font_collection);
 
       if (layout.nGlyphs() == 0)
         continue;