1 files changed, 96 insertions, 0 deletions
diff --git a/src/user/raleigh/s/text_flower.cpp b/src/user/raleigh/s/text_flower.cpp
new file mode 100644
index 0000000..bd4ecd8
--- /dev/null
+++ b/src/user/raleigh/s/text_flower.cpp
@@ -0,0 +1,96 @@
+#include <raleigh/s/text_flower.h>
+#include <knob/block.h>
+
+namespace raleigh {
+  text_flower::text_flower(const char *s, uint32_t cols, uint32_t max_rows)
+    : s(s), lines(max_rows ? max_rows : 10), offsets(max_rows ? max_rows : 10),
+      max_rows(max_rows), cols(cols) {
+    flow_text();
+  }
+
+  __attribute__ ((pure))
+  uint32_t text_flower::get_n_lines() {
+    return lines.n_entries;
+  }
+
+  __attribute__ ((pure))
+  char *text_flower::get_nth_line(uint32_t n) {
+    return lines.buf[n];
+  }
+
+  __attribute__ ((pure))
+  uint32_t text_flower::get_line_offset(uint32_t n) {
+    return offsets.buf[n];
+  }
+
+  void text_flower::draw_text(_pixel_t *start, uint32_t pitch, const struct font_info *fi, _pixel_t color) {
+    for (uint32_t y = 0; y < lines.n_entries; ++y) {
+      const char *line = lines.buf[y];
+      for (uint32_t x = 0; line[x]; ++x)
+        put_char_no_bg(fi, line[x], start + y * fi->space_height * pitch + x * fi->space_width, pitch, color);
+    }
+  }
+
+  void text_flower::push_line() {
+    lines.add_back(strndup(line_start, row_len));
+    offsets.add_back(line_start - s);
+    line_start = on_char;
+    row_len = 0;
+    if (max_rows && (lines.n_entries == max_rows))
+      on_char = "";
+  }
+
+  void text_flower::flow_text() {
+    for (uint32_t i = 0; i < lines.n_entries; ++i)
+      free_block(lines.buf[i]);
+
+    lines.n_entries = 0;
+    offsets.n_entries = 0;
+    line_start = on_char = s;
+    row_len = 0;
+
+    while (*on_char) {
+      if (*on_char == '\n') {
+        ++on_char;
+        push_line();
+      }
+
+      else if (*on_char == ' ') {
+        ++on_char;
+        if (row_len != 0) {
+          if (++row_len == cols)
+            push_line();
+        }
+        else
+          ++line_start;
+      }
+
+      else {
+        uint32_t word_len = str_find_any(on_char, " \n");
+        if (!cols) {
+          row_len += word_len;
+          on_char += word_len;
+        }
+
+        else if (row_len + word_len <= cols) {
+          row_len += word_len;
+          on_char += word_len;
+          if (row_len == cols)
+            push_line();
+        }
+
+        else if (word_len > cols) {
+          on_char += cols - row_len;
+          row_len = cols;
+          push_line();
+        }
+
+        else
+          push_line();
+      }
+    }
+
+    if (row_len && (!max_rows || (lines.n_entries != max_rows)))
+      push_line();
+  }
+}
+\ No newline at end of file