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-rw-r--r--buffer.c90
1 files changed, 87 insertions, 3 deletions
diff --git a/buffer.c b/buffer.c
index cc97e19..422f03c 100644
--- a/buffer.c
+++ b/buffer.c
@@ -1,4 +1,6 @@
// Text buffers - These store the contents of a file.
+// NOTE: All text editing should be done through the two functions
+// buffer_insert_text_at_pos and buffer_delete_chars_at_pos
// this is a macro so we get -Wformat warnings
#define buffer_seterr(buffer, ...) \
@@ -181,7 +183,7 @@ static u64 buffer_checksum(TextBuffer *buffer) {
// Returns the number of characters gotten.
// You can pass NULL for text if you just want to know how many characters *could* be accessed before the
// end of the file.
-static size_t buffer_get_text_at_pos(TextBuffer *buffer, BufferPos pos, char32_t *text, size_t nchars) {
+size_t buffer_get_text_at_pos(TextBuffer *buffer, BufferPos pos, char32_t *text, size_t nchars) {
if (!buffer_pos_valid(buffer, pos)) {
return 0; // invalid position. no chars for you!
}
@@ -213,6 +215,32 @@ static size_t buffer_get_text_at_pos(TextBuffer *buffer, BufferPos pos, char32_t
return nchars - chars_left;
}
+// returns a UTF-32 string of at most `nchars` code points from `buffer` starting at `pos`
+// the string should be str32_free'd.
+String32 buffer_get_str32_text_at_pos(TextBuffer *buffer, BufferPos pos, size_t nchars) {
+ String32 s32 = {0};
+ size_t len = buffer_get_text_at_pos(buffer, pos, NULL, nchars);
+ if (len) {
+ char32_t *str = buffer_calloc(buffer, len, sizeof *str);
+ if (str) {
+ buffer_get_text_at_pos(buffer, pos, str, nchars);
+ s32.str = str;
+ s32.len = len;
+ }
+ }
+ return s32;
+}
+
+// see buffer_get_str32_text_at_pos. returns NULL on failure (out of memory)
+// the returned string should be free'd
+char *buffer_get_utf8_text_at_pos(TextBuffer *buffer, BufferPos pos, size_t nchars) {
+ String32 s32 = buffer_get_str32_text_at_pos(buffer, pos, nchars);
+ char *ret = str32_to_utf8_cstr(s32);
+ if (!ret) buffer_out_of_mem(buffer);
+ str32_free(&s32);
+ return ret;
+}
+
static BufferPos buffer_pos_advance(TextBuffer *buffer, BufferPos pos, size_t nchars) {
buffer_pos_validate(buffer, &pos);
size_t chars_left = nchars;
@@ -619,6 +647,9 @@ bool buffer_save(TextBuffer *buffer) {
}
if (ferror(out)) success = false;
if (fclose(out) != 0) success = false;
+ if (success) {
+ buffer->modified = false;
+ }
return success;
} else {
buffer_seterr(buffer, "Couldn't create file %s.", buffer->filename);
@@ -1280,6 +1311,8 @@ BufferPos buffer_insert_text_at_pos(TextBuffer *buffer, BufferPos pos, String32
// We need to put this after the end so the emptiness-checking is done after the edit is made.
buffer_remove_last_edit_if_empty(buffer);
+ buffer->modified = true;
+
BufferPos b = {.line = line_idx, .index = index};
return b;
}
@@ -1522,6 +1555,8 @@ void buffer_delete_chars_at_pos(TextBuffer *buffer, BufferPos pos, i64 nchars_)
// cursor position could have been invalidated by this edit
buffer_validate_cursor(buffer);
+
+ buffer->modified = true;
}
// Delete characters between the given buffer positions. Returns number of characters deleted.
@@ -1683,6 +1718,49 @@ void buffer_redo(TextBuffer *buffer, i64 ntimes) {
}
}
+void buffer_copy_or_cut(TextBuffer *buffer, bool cut) {
+ if (buffer->selection) {
+ BufferPos pos1 = buffer_pos_min(buffer->selection_pos, buffer->cursor_pos);
+ BufferPos pos2 = buffer_pos_max(buffer->selection_pos, buffer->cursor_pos);
+ i64 selection_len = buffer_pos_diff(buffer, pos1, pos2);
+ char *text = buffer_get_utf8_text_at_pos(buffer, pos1, (size_t)selection_len);
+ if (text) {
+ int err = SDL_SetClipboardText(text);
+ free(text);
+ if (err < 0) {
+ buffer_seterr(buffer, "Couldn't get clipboard contents: %s", SDL_GetError());
+ } else {
+ // text copied successfully
+ if (cut) {
+ buffer_delete_selection(buffer);
+ }
+ }
+ }
+ }
+}
+
+void buffer_copy(TextBuffer *buffer) {
+ buffer_copy_or_cut(buffer, false);
+}
+
+void buffer_cut(TextBuffer *buffer) {
+ buffer_copy_or_cut(buffer, true);
+}
+
+void buffer_paste(TextBuffer *buffer) {
+ if (SDL_HasClipboardText()) {
+ char *text = SDL_GetClipboardText();
+ if (text) {
+ String32 str = str32_from_utf8(text);
+ if (str.len) {
+ buffer_insert_text_at_cursor(buffer, str);
+ str32_free(&str);
+ }
+ SDL_free(text);
+ }
+ }
+}
+
// for debugging
#if DEBUG
static void buffer_pos_check_valid(TextBuffer *buffer, BufferPos p) {
@@ -1752,8 +1830,11 @@ void buffer_render(TextBuffer *buffer, float x1, float y1, float x2, float y2) {
if (!buffer->is_line_buffer) { // header
glColor3f(1,1,1);
float x = x1, y = y1;
- if (buffer->filename)
- text_render_with_state(font, &text_state, buffer->filename, x, y);
+ if (buffer->filename) {
+ char text[256] = {0};
+ strbuf_printf(text, "%s%s%s", buffer->modified ? "*" : "", buffer->filename, buffer->modified ? "*" :"");
+ text_render_with_state(font, &text_state, text, x, y);
+ }
#if DEBUG
// show checksum
char checksum[32] = {0};
@@ -1853,6 +1934,9 @@ void buffer_render(TextBuffer *buffer, float x1, float y1, float x2, float y2) {
.render = true
};
+ // sel_pos >= scrolloff
+ // sel - scroll >= scrolloff
+ // scroll <= sel - scrolloff
text_state.y -= (float)(buffer->scroll_y - start_line) * char_height;
gl_color_rgba(colors[COLOR_TEXT]);