Add paragraph and fix hflow

ftxui/CMakeLists.txt

@@ -23,6 +23,7 @@ add_library(dom
   src/ftxui/dom/inverted.cpp
   src/ftxui/dom/node.cpp
   src/ftxui/dom/node_decorator.cpp
+  src/ftxui/dom/paragraph.cpp
   src/ftxui/dom/separator.cpp
   src/ftxui/dom/size.cpp
   src/ftxui/dom/spinner.cpp

ftxui/include/ftxui/dom/elements.hpp

@@ -19,6 +19,7 @@ Element gauge(float ratio);
 Element border(Element);
 Element window(Element title, Element content);
 Element spinner(int charset_index, size_t image_index);
+Elements paragraph(std::wstring text); // Use inside hflow(). Split by space.
 
 // -- Decorator ---
 Element bold(Element);

ftxui/src/ftxui/dom/hflow.cpp

@@ -36,18 +36,18 @@ class HFlow : public Node {
       }
 
       // Does the current row big enough to contain the element?
-      if (y + requirement.min.y > box.y_max)
+      if (y + requirement.min.y > box.y_max + 1)
         break; // No? Ignore the element.
 
       Box children_box;
       children_box.x_min = x;
-      children_box.x_max = x + requirement.min.x;
+      children_box.x_max = x + requirement.min.x - 1;
       children_box.y_min = y;
-      children_box.y_max = y + requirement.min.y;
+      children_box.y_max = y + requirement.min.y - 1;
       child->SetBox(children_box);
 
-      x = x + requirement.min.x + 1;
-      y_next = std::max(y_next, y + requirement.min.y + 1);
+      x = x + requirement.min.x;
+      y_next = std::max(y_next, y + requirement.min.y);
     }
   }
 };

ftxui/src/ftxui/dom/paragraph.cpp

@@ -0,0 +1,18 @@
+#include <sstream>
+#include "ftxui/dom/elements.hpp"
+
+namespace ftxui {
+
+Elements paragraph(std::wstring the_text) {
+  Elements output;
+  std::wstringstream ss(the_text);
+  std::wstring word;
+  while (std::getline(ss, word, L' ')) {
+    if (word.size()) {
+      output.push_back(text(word + L' '));
+    }
+  }
+  return output;
+}
+
+}  // namespace ftxui