build: Updated ImGui to v1.92.3

Author: WerWolv

lib/third_party/imgui/imgui/include/imgui.h

@@ -181,10 +181,10 @@
 //
 // To support UTF-8:
 //
-//    STB_TEXTEDIT_GETPREVCHARINDEX      returns index of previous character 
-//    STB_TEXTEDIT_GETNEXTCHARINDEX      returns index of next character 
+//    STB_TEXTEDIT_GETPREVCHARINDEX      returns index of previous character
+//    STB_TEXTEDIT_GETNEXTCHARINDEX      returns index of next character
 //    Do NOT define STB_TEXTEDIT_KEYTOTEXT.
-//    Instead, call stb_textedit_text() directly for text contents. 
+//    Instead, call stb_textedit_text() directly for text contents.
 //
 // Keyboard input must be encoded as a single integer value; e.g. a character code
 // and some bitflags that represent shift states. to simplify the interface, SHIFT must
@@ -260,7 +260,7 @@
 //
 //      text: (added 2025)
 //          call this to directly send text input the textfield, which is required
-//          for UTF-8 support, because stb_textedit_key() + STB_TEXTEDIT_KEYTOTEXT() 
+//          for UTF-8 support, because stb_textedit_key() + STB_TEXTEDIT_KEYTOTEXT()
 //          cannot infer text length.
 //
 //
@@ -427,7 +427,7 @@ typedef struct
 //
 
 // traverse the layout to locate the nearest character to a display position
-static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
+static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y, int* out_side_on_line)
 {
    StbTexteditRow r;
    int n = STB_TEXTEDIT_STRINGLEN(str);
@@ -437,6 +437,7 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
    r.x0 = r.x1 = 0;
    r.ymin = r.ymax = 0;
    r.num_chars = 0;
+   *out_side_on_line = 0;
 
    // search rows to find one that straddles 'y'
    while (i < n) {
@@ -456,7 +457,10 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
 
    // below all text, return 'after' last character
    if (i >= n)
+   {
+      *out_side_on_line = 1;
       return n;
+   }
 
    // check if it's before the beginning of the line
    if (x < r.x0)
@@ -469,6 +473,7 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
       for (k=0; k < r.num_chars; k = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, i + k) - i) {
          float w = STB_TEXTEDIT_GETWIDTH(str, i, k);
          if (x < prev_x+w) {
+            *out_side_on_line = (k == 0) ? 0 : 1;
             if (x < prev_x+w/2)
                return k+i;
             else
@@ -480,6 +485,7 @@ static int stb_text_locate_coord(IMSTB_TEXTEDIT_STRING *str, float x, float y)
    }
 
    // if the last character is a newline, return that. otherwise return 'after' the last character
+   *out_side_on_line = 1;
    if (STB_TEXTEDIT_GETCHAR(str, i+r.num_chars-1) == STB_TEXTEDIT_NEWLINE)
       return i+r.num_chars-1;
    else
@@ -491,23 +497,26 @@ static void stb_textedit_click(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *st
 {
    // In single-line mode, just always make y = 0. This lets the drag keep working if the mouse
    // goes off the top or bottom of the text
+   int side_on_line;
    if( state->single_line )
    {
       StbTexteditRow r;
       STB_TEXTEDIT_LAYOUTROW(&r, str, 0);
       y = r.ymin;
    }
 
-   state->cursor = stb_text_locate_coord(str, x, y);
+   state->cursor = stb_text_locate_coord(str, x, y, &side_on_line);
    state->select_start = state->cursor;
    state->select_end = state->cursor;
    state->has_preferred_x = 0;
+   str->LastMoveDirectionLR = (ImS8)(side_on_line ? ImGuiDir_Right : ImGuiDir_Left);
 }
 
 // API drag: on mouse drag, move the cursor and selection endpoint to the clicked location
 static void stb_textedit_drag(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state, float x, float y)
 {
    int p = 0;
+   int side_on_line;
 
    // In single-line mode, just always make y = 0. This lets the drag keep working if the mouse
    // goes off the top or bottom of the text
@@ -521,8 +530,9 @@ static void stb_textedit_drag(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *sta
    if (state->select_start == state->select_end)
       state->select_start = state->cursor;
 
-   p = stb_text_locate_coord(str, x, y);
+   p = stb_text_locate_coord(str, x, y, &side_on_line);
    state->cursor = state->select_end = p;
+   str->LastMoveDirectionLR = (ImS8)(side_on_line ? ImGuiDir_Right : ImGuiDir_Left);
 }
 
 /////////////////////////////////////////////////////////////////////////////
@@ -572,6 +582,8 @@ static void stb_textedit_find_charpos(StbFindState *find, IMSTB_TEXTEDIT_STRING
       STB_TEXTEDIT_LAYOUTROW(&r, str, i);
       if (n < i + r.num_chars)
          break;
+      if (str->LastMoveDirectionLR == ImGuiDir_Right && str->Stb->cursor > 0 && str->Stb->cursor == i + r.num_chars && STB_TEXTEDIT_GETCHAR(str, i + r.num_chars - 1) != STB_TEXTEDIT_NEWLINE) // [DEAR IMGUI] Wrapping point handling
+         break;
       if (i + r.num_chars == z && z > 0 && STB_TEXTEDIT_GETCHAR(str, z - 1) != STB_TEXTEDIT_NEWLINE)  // [DEAR IMGUI] special handling for last line
          break;   // [DEAR IMGUI]
       prev_start = i;
@@ -668,6 +680,35 @@ static void stb_textedit_move_to_last(IMSTB_TEXTEDIT_STRING *str, STB_TexteditSt
    }
 }
 
+// [DEAR IMGUI] Extracted this function so we can more easily add support for word-wrapping.
+#ifndef STB_TEXTEDIT_MOVELINESTART
+static int stb_textedit_move_line_start(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state, int cursor)
+{
+   if (state->single_line)
+      return 0;
+   while (cursor > 0) {
+      int prev = IMSTB_TEXTEDIT_GETPREVCHARINDEX(str, cursor);
+      if (STB_TEXTEDIT_GETCHAR(str, prev) == STB_TEXTEDIT_NEWLINE)
+         break;
+      cursor = prev;
+   }
+   return cursor;
+}
+#define STB_TEXTEDIT_MOVELINESTART stb_textedit_move_line_start
+#endif
+#ifndef STB_TEXTEDIT_MOVELINEEND
+static int stb_textedit_move_line_end(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *state, int cursor)
+{
+   int n = STB_TEXTEDIT_STRINGLEN(str);
+   if (state->single_line)
+      return n;
+   while (cursor < n && STB_TEXTEDIT_GETCHAR(str, cursor) != STB_TEXTEDIT_NEWLINE)
+      cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, cursor);
+   return cursor;
+}
+#define STB_TEXTEDIT_MOVELINEEND stb_textedit_move_line_end
+#endif
+
 #ifdef STB_TEXTEDIT_IS_SPACE
 static int is_word_boundary( IMSTB_TEXTEDIT_STRING *str, int idx )
 {
@@ -921,8 +962,8 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
 
             // [DEAR IMGUI]
             // going down while being on the last line shouldn't bring us to that line end
-            if (STB_TEXTEDIT_GETCHAR(str, find.first_char + find.length - 1) != STB_TEXTEDIT_NEWLINE)
-               break;
+            //if (STB_TEXTEDIT_GETCHAR(str, find.first_char + find.length - 1) != STB_TEXTEDIT_NEWLINE)
+            //   break;
 
             // now find character position down a row
             state->cursor = start;
@@ -943,6 +984,8 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
             }
             stb_textedit_clamp(str, state);
 
+            if (state->cursor == find.first_char + find.length)
+               str->LastMoveDirectionLR = ImGuiDir_Left;
             state->has_preferred_x = 1;
             state->preferred_x = goal_x;
 
@@ -1007,6 +1050,10 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
             }
             stb_textedit_clamp(str, state);
 
+            if (state->cursor == find.first_char)
+               str->LastMoveDirectionLR = ImGuiDir_Right;
+            else if (state->cursor == find.prev_first)
+               str->LastMoveDirectionLR = ImGuiDir_Left;
             state->has_preferred_x = 1;
             state->preferred_x = goal_x;
 
@@ -1024,7 +1071,7 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
                prev_scan = prev;
             }
             find.first_char = find.prev_first;
-            find.prev_first = prev_scan;
+            find.prev_first = STB_TEXTEDIT_MOVELINESTART(str, state, prev_scan);
          }
          break;
       }
@@ -1098,24 +1145,17 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
       case STB_TEXTEDIT_K_LINESTART:
          stb_textedit_clamp(str, state);
          stb_textedit_move_to_first(state);
-         if (state->single_line)
-            state->cursor = 0;
-         else while (state->cursor > 0 && STB_TEXTEDIT_GETCHAR(str, state->cursor-1) != STB_TEXTEDIT_NEWLINE)
-            state->cursor = IMSTB_TEXTEDIT_GETPREVCHARINDEX(str, state->cursor);
+         state->cursor = STB_TEXTEDIT_MOVELINESTART(str, state, state->cursor);
          state->has_preferred_x = 0;
          break;
 
 #ifdef STB_TEXTEDIT_K_LINEEND2
       case STB_TEXTEDIT_K_LINEEND2:
 #endif
       case STB_TEXTEDIT_K_LINEEND: {
-         int n = STB_TEXTEDIT_STRINGLEN(str);
          stb_textedit_clamp(str, state);
-         stb_textedit_move_to_first(state);
-         if (state->single_line)
-            state->cursor = n;
-         else while (state->cursor < n && STB_TEXTEDIT_GETCHAR(str, state->cursor) != STB_TEXTEDIT_NEWLINE)
-            state->cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, state->cursor);
+         stb_textedit_move_to_last(str, state);
+         state->cursor = STB_TEXTEDIT_MOVELINEEND(str, state, state->cursor);
          state->has_preferred_x = 0;
          break;
       }
@@ -1126,10 +1166,7 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
       case STB_TEXTEDIT_K_LINESTART | STB_TEXTEDIT_K_SHIFT:
          stb_textedit_clamp(str, state);
          stb_textedit_prep_selection_at_cursor(state);
-         if (state->single_line)
-            state->cursor = 0;
-         else while (state->cursor > 0 && STB_TEXTEDIT_GETCHAR(str, state->cursor-1) != STB_TEXTEDIT_NEWLINE)
-            state->cursor = IMSTB_TEXTEDIT_GETPREVCHARINDEX(str, state->cursor);
+         state->cursor = STB_TEXTEDIT_MOVELINESTART(str, state, state->cursor);
          state->select_end = state->cursor;
          state->has_preferred_x = 0;
          break;
@@ -1138,13 +1175,9 @@ static void stb_textedit_key(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *stat
       case STB_TEXTEDIT_K_LINEEND2 | STB_TEXTEDIT_K_SHIFT:
 #endif
       case STB_TEXTEDIT_K_LINEEND | STB_TEXTEDIT_K_SHIFT: {
-         int n = STB_TEXTEDIT_STRINGLEN(str);
          stb_textedit_clamp(str, state);
          stb_textedit_prep_selection_at_cursor(state);
-         if (state->single_line)
-             state->cursor = n;
-         else while (state->cursor < n && STB_TEXTEDIT_GETCHAR(str, state->cursor) != STB_TEXTEDIT_NEWLINE)
-            state->cursor = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(str, state->cursor);
+         state->cursor = STB_TEXTEDIT_MOVELINEEND(str, state, state->cursor);
          state->select_end = state->cursor;
          state->has_preferred_x = 0;
          break;