linux_door/jni/edge/field.cpp

#include "base/strings.hpp"
#include "field.h"

TextExtent GetTextExtent(ZKTextView* view, const std::string& str) {
  if (view == NULL) {
    return {0, 0};
  }
  int w;
  int h;
  view->getTextExtent(str.c_str(), w, h);
  return {w, h};
}

std::string EllipsisText(ZKTextView* view, const std::string& str) {
  if (view == NULL) {
    return "";
  }
  if (str.empty()) {
    return str;
  }
  const char* elipsis = "…";
  const int elipsis_width = GetTextExtent(view, elipsis).w;
  const int view_width = view->getPosition().mWidth;
  int w = GetTextExtent(view, str.c_str()).w;
  if (w <= (view->getPosition().mWidth)) {
    return str;
  }
  std::vector<std::string> words;
  base::split_word(str, &words);
  std::string cut_str;
  while (words.size() > 0) {
    words.erase(words.end() - 1);
    cut_str = base::join(words);
    w = GetTextExtent(view, cut_str).w;
    if ((w + elipsis_width) > view_width) {
      continue;
    }
    break;
  }
  return cut_str + elipsis;
}