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Add support for clipboard. Improve text selection behaviour. Various fixes.

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This commit is contained in:
Michael Drake 2013-01-09 18:10:20 +00:00
parent 31e7b6d983
commit ec8e6ac91d
1 changed files with 133 additions and 53 deletions
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186
desktop/textarea.c
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@ -391,12 +391,13 @@ static bool textarea_reflow(struct textarea *ta, unsigned int line)
/**
* get character offset from the beginning of the text for some coordinates
* get byte/character offset from the beginning of the text for some coordinates
*
* \param ta Text area
* \param x X coordinate
* \param y Y coordinate
* \return character offset
* \param b_off Updated to byte offset
* \param c_off Updated to character offset
*/
static void textarea_get_xy_offset(struct textarea *ta, int x, int y,
size_t *b_off, unsigned int *c_off)
@ -435,7 +436,8 @@ static void textarea_get_xy_offset(struct textarea *ta, int x, int y,
* after it. Otherwise, the caret will be placed at the start of the
* following line, which is undesirable.
*/
if (bpos == (unsigned)ta->lines[line].b_length &&
if (ta->flags & TEXTAREA_MULTILINE &&
bpos == (unsigned)ta->lines[line].b_length &&
ta->text[ta->lines[line].b_start +
ta->lines[line].b_length - 1] == ' ')
bpos--;
@ -476,15 +478,15 @@ static bool textarea_set_caret_xy(struct textarea *ta, int x, int y)
/**
* Insert text into the text area
*
* \param ta Text area
* \param index 0-based character index to insert at
* \param text UTF-8 text to insert
* \param ta Text area
* \param index 0-based character index to insert at
* \param text UTF-8 text to insert
* \param b_len Byte length of UTF-8 text
* \return false on memory exhaustion, true otherwise
*/
static bool textarea_insert_text(struct textarea *ta, unsigned int index,
const char *text)
const char *text, size_t b_len)
{
unsigned int b_len = strlen(text);
size_t b_off;
if (ta->flags & TEXTAREA_READONLY)
@ -495,9 +497,9 @@ static bool textarea_insert_text(struct textarea *ta, unsigned int index,
index = ta->text_utf8_len;
/* find byte offset of insertion point */
for (b_off = 0; index-- > 0;
for (b_off = 0; index > 0;
b_off = utf8_next(ta->text, ta->text_len, b_off))
; /* do nothing */
index--;
if (b_len + ta->text_len >= ta->text_alloc) {
char *temp = realloc(ta->text, b_len + ta->text_len + 64);
@ -516,7 +518,7 @@ static bool textarea_insert_text(struct textarea *ta, unsigned int index,
/* Insert new text */
memcpy(ta->text + b_off, text, b_len);
ta->text_len += b_len;
ta->text_utf8_len += utf8_length(text);
ta->text_utf8_len += utf8_bounded_length(text, b_len);
textarea_normalise_text(ta, b_off, b_len);
@ -529,16 +531,18 @@ static bool textarea_insert_text(struct textarea *ta, unsigned int index,
/**
* Replace text in a text area
*
* \param ta Text area
* \param start Start character index of replaced section (inclusive)
* \param end End character index of replaced section (exclusive)
* \param text UTF-8 text to insert
* \param ta Text area
* \param start Start character index of replaced section (inclusive)
* \param end End character index of replaced section (exclusive)
* \param rep Replacement UTF-8 text to insert
* \param rep_len Byte length of replacement UTF-8 text
* \param add_to_clipboard True iff replaced text to be added to clipboard
* \return false on memory exhaustion, true otherwise
*/
static bool textarea_replace_text(struct textarea *ta, unsigned int start,
unsigned int end, const char *text)
unsigned int end, const char *rep, size_t rep_len,
bool add_to_clipboard)
{
unsigned int b_len = strlen(text);
size_t b_start, b_end, diff;
if (ta->flags & TEXTAREA_READONLY)
@ -549,8 +553,8 @@ static bool textarea_replace_text(struct textarea *ta, unsigned int start,
if (end > ta->text_utf8_len)
end = ta->text_utf8_len;
if (start == end)
return textarea_insert_text(ta, start, text);
if (start == end && rep != NULL)
return textarea_insert_text(ta, start, rep, rep_len);
if (start > end)
return false;
@ -567,9 +571,20 @@ static bool textarea_replace_text(struct textarea *ta, unsigned int start,
b_end = utf8_next(ta->text, ta->text_len, b_end))
; /* do nothing */
if (b_len + ta->text_len - (b_end - b_start) >= ta->text_alloc) {
/* Place CUTs on clipboard */
if (add_to_clipboard)
gui_set_clipboard(ta->text + b_start, b_end - b_start,
NULL, 0);
if (rep == NULL) {
/* No replacement text */
return true;
}
/* Ensure textarea's text buffer is large enough */
if (rep_len + ta->text_len - (b_end - b_start) >= ta->text_alloc) {
char *temp = realloc(ta->text,
b_len + ta->text_len - (b_end - b_start) + 64);
rep_len + ta->text_len - (b_end - b_start) + 64);
if (temp == NULL) {
LOG(("realloc failed"));
return false;
@ -577,19 +592,19 @@ static bool textarea_replace_text(struct textarea *ta, unsigned int start,
ta->text = temp;
ta->text_alloc =
b_len + ta->text_len - (b_end - b_start) + 64;
rep_len + ta->text_len - (b_end - b_start) + 64;
}
/* Shift text following to new position */
memmove(ta->text + b_start + b_len, ta->text + b_end,
memmove(ta->text + b_start + rep_len, ta->text + b_end,
ta->text_len - b_end);
/* Insert new text */
memcpy(ta->text + b_start, text, b_len);
memcpy(ta->text + b_start, rep, rep_len);
ta->text_len += b_len - (b_end - b_start);
ta->text_len += rep_len - (b_end - b_start);
ta->text_utf8_len = utf8_length(ta->text);
textarea_normalise_text(ta, b_start, b_len);
textarea_normalise_text(ta, b_start, rep_len);
/** \todo calculate line to reflow from */
return textarea_reflow(ta, 0);
@ -729,7 +744,7 @@ bool textarea_set_caret(struct textarea *ta, int caret)
c_len = ta->text_utf8_len;
if (caret != -1 && (unsigned)caret > c_len)
if (caret != -1 && caret > (signed)c_len)
caret = c_len;
if (ta->flags & TEXTAREA_MULTILINE) {
@ -1073,10 +1088,23 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
length = utf8_from_ucs4(key, utf8);
utf8[length] = '\0';
if (!textarea_insert_text(ta, caret, utf8))
return false;
caret++;
redraw = true;
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end, utf8, length, false))
return false;
caret = ta->sel_start + 1;
ta->sel_start = ta->sel_end = -1;
redraw = true;
} else {
if (!textarea_replace_text(ta,
caret, caret,
utf8, length, false))
return false;
caret++;
redraw = true;
}
} else switch (key) {
case KEY_SELECT_ALL:
@ -1087,6 +1115,13 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
redraw = true;
break;
case KEY_COPY_SELECTION:
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end,
NULL, 0, true))
return false;
}
break;
case KEY_DELETE_LEFT:
if (readonly)
@ -1094,37 +1129,83 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end, ""))
ta->sel_end, "", 0, false))
return false;
caret = ta->sel_start;
ta->sel_start = ta->sel_end = -1;
redraw = true;
} else {
if (caret) {
if (!textarea_replace_text(ta,
caret - 1,
caret, ""))
return false;
caret--;
redraw = true;
}
} else if (caret > 0) {
if (!textarea_replace_text(ta,
caret - 1,
caret, "", 0, false))
return false;
caret--;
redraw = true;
}
break;
case KEY_NL:
if (readonly)
break;
if(!textarea_insert_text(ta, caret, "\n"))
if(!textarea_insert_text(ta, caret, "\n", 1))
return false;
caret++;
ta->sel_start = ta->sel_end = -1;
redraw = true;
break;
case KEY_CUT_LINE:
break;
case KEY_PASTE:
{
if (readonly)
break;
char *clipboard;
size_t clipboard_length;
size_t clipboard_chars;
gui_get_clipboard(&clipboard, &clipboard_length);
clipboard_chars = utf8_bounded_length(clipboard,
clipboard_length);
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start, ta->sel_end,
clipboard, clipboard_length,
false))
return false;
caret = ta->sel_start + clipboard_chars;
ta->sel_start = ta->sel_end = -1;
redraw = true;
} else {
if (!textarea_replace_text(ta,
caret, caret,
clipboard, clipboard_length,
false))
return false;
caret += clipboard_chars;
redraw = true;
}
free(clipboard);
}
break;
case KEY_CUT_SELECTION:
if (readonly)
break;
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end, "", 0, true))
return false;
caret = ta->sel_start;
ta->sel_start = ta->sel_end = -1;
redraw = true;
}
break;
case KEY_ESCAPE:
/* Fall through to KEY_CLEAR_SELECTION */
case KEY_CLEAR_SELECTION:
ta->sel_start = -1;
ta->sel_end = -1;
@ -1133,7 +1214,7 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
case KEY_LEFT:
if (readonly)
break;
if (caret)
if (caret > 0)
caret--;
if (ta->sel_start != -1) {
ta->sel_start = ta->sel_end = -1;
@ -1158,8 +1239,7 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
KEY_UP */
line = ta->caret_pos.line - (ta->vis_height +
ta->line_height - 1) /
ta->line_height
+ 1;
ta->line_height + 1;
}
/* fall through */
case KEY_UP:
@ -1257,7 +1337,7 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end, ""))
ta->sel_end, "", 0, false))
return false;
caret = ta->sel_start;
@ -1265,8 +1345,9 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
redraw = true;
} else {
if (caret < ta->text_utf8_len) {
if (!textarea_replace_text(ta, caret,
caret + 1, ""))
if (!textarea_replace_text(ta,
caret, caret + 1,
"", 0, false))
return false;
redraw = true;
}
@ -1324,7 +1405,7 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end, ""))
ta->sel_end, "", 0, false))
return false;
ta->sel_start = ta->sel_end = -1;
} else {
@ -1333,7 +1414,7 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
l_len = utf8_bounded_length(&(ta->text[b_off]),
b_len);
if (!textarea_replace_text(ta, caret,
caret + l_len, ""))
caret + l_len, "", 0, false))
return false;
}
redraw = true;
@ -1344,14 +1425,13 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
if (ta->sel_start != -1) {
if (!textarea_replace_text(ta,
ta->sel_start,
ta->sel_end, ""))
ta->sel_end, "", 0, false))
return false;
ta->sel_start = ta->sel_end = -1;
} else {
if (!textarea_replace_text(ta,
caret - ta->caret_pos.char_off,
caret,
""))
caret, "", 0, false))
return false;
caret -= ta->caret_pos.char_off;
}