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InputText: Word-Wrap: mouse clicks on word-wrapping points set cursor side correctly. (#3237, #952, #1062, #7363)

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ocornut 2025-08-28 19:37:52 +02:00
parent a82f66a9b0
commit 985723ed94
1 changed files with 13 additions and 3 deletions
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16
imstb_textedit.h
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@ -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
@ -491,6 +497,7 @@ 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;
@ -498,16 +505,18 @@ static void stb_textedit_click(IMSTB_TEXTEDIT_STRING *str, STB_TexteditState *st
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);
}
/////////////////////////////////////////////////////////////////////////////