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virtualx-engine/scene/gui/label.cpp
Juan Linietsky 33b5c57199 Variant: Added 64-bit packed arrays, renamed Variant::REAL to FLOAT. 
- Renames PackedIntArray to PackedInt32Array.
- Renames PackedFloatArray to PackedFloat32Array.
- Adds PackedInt64Array and PackedFloat64Array.
- Renames Variant::REAL to Variant::FLOAT for consistency.

Packed arrays are for storing large amount of data and creating stuff like
meshes, buffers. textures, etc. Forcing them to be 64 is a huge waste of
memory. That said, many users requested the ability to have 64 bits packed
arrays for their games, so this is just an optional added type.

For Variant, the float datatype is always 64 bits, and exposed as `float`.

We still have `real_t` which is the datatype that can change from 32 to 64
bits depending on a compile flag (not entirely working right now, but that's
the idea). It affects math related datatypes and code only.

Neither Variant nor PackedArray make use of real_t, which is only intended
for math precision, so the term is removed from there to keep only float.
2020-02-25 12:55:53 +01:00

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/*************************************************************************/
/* label.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "label.h"
#include "core/print_string.h"
#include "core/project_settings.h"
#include "core/translation.h"
void Label::set_autowrap(bool p_autowrap) {
if (autowrap == p_autowrap) {
return;
}
autowrap = p_autowrap;
word_cache_dirty = true;
update();
if (clip) {
minimum_size_changed();
}
}
bool Label::has_autowrap() const {
return autowrap;
}
void Label::set_uppercase(bool p_uppercase) {
uppercase = p_uppercase;
word_cache_dirty = true;
update();
}
bool Label::is_uppercase() const {
return uppercase;
}
int Label::get_line_height() const {
return get_font("font")->get_height();
}
void Label::_notification(int p_what) {
if (p_what == NOTIFICATION_TRANSLATION_CHANGED) {
String new_text = tr(text);
if (new_text == xl_text)
return; //nothing new
xl_text = new_text;
regenerate_word_cache();
update();
}
if (p_what == NOTIFICATION_DRAW) {
if (clip) {
VisualServer::get_singleton()->canvas_item_set_clip(get_canvas_item(), true);
}
if (word_cache_dirty)
regenerate_word_cache();
RID ci = get_canvas_item();
Size2 string_size;
Size2 size = get_size();
Ref<StyleBox> style = get_stylebox("normal");
Ref<Font> font = get_font("font");
Color font_color = get_color("font_color");
Color font_color_shadow = get_color("font_color_shadow");
bool use_outline = get_constant("shadow_as_outline");
Point2 shadow_ofs(get_constant("shadow_offset_x"), get_constant("shadow_offset_y"));
int line_spacing = get_constant("line_spacing");
Color font_outline_modulate = get_color("font_outline_modulate");
style->draw(ci, Rect2(Point2(0, 0), get_size()));
VisualServer::get_singleton()->canvas_item_set_distance_field_mode(get_canvas_item(), font.is_valid() && font->is_distance_field_hint());
int font_h = font->get_height() + line_spacing;
int lines_visible = (size.y + line_spacing) / font_h;
real_t space_w = font->get_char_size(' ').width;
int chars_total = 0;
int vbegin = 0, vsep = 0;
if (lines_visible > line_count) {
lines_visible = line_count;
}
if (max_lines_visible >= 0 && lines_visible > max_lines_visible) {
lines_visible = max_lines_visible;
}
if (lines_visible > 0) {
switch (valign) {
case VALIGN_TOP: {
//nothing
} break;
case VALIGN_CENTER: {
vbegin = (size.y - (lines_visible * font_h - line_spacing)) / 2;
vsep = 0;
} break;
case VALIGN_BOTTOM: {
vbegin = size.y - (lines_visible * font_h - line_spacing);
vsep = 0;
} break;
case VALIGN_FILL: {
vbegin = 0;
if (lines_visible > 1) {
vsep = (size.y - (lines_visible * font_h - line_spacing)) / (lines_visible - 1);
} else {
vsep = 0;
}
} break;
}
}
WordCache *wc = word_cache;
if (!wc)
return;
int line = 0;
int line_to = lines_skipped + (lines_visible > 0 ? lines_visible : 1);
FontDrawer drawer(font, font_outline_modulate);
while (wc) {
/* handle lines not meant to be drawn quickly */
if (line >= line_to)
break;
if (line < lines_skipped) {
while (wc && wc->char_pos >= 0)
wc = wc->next;
if (wc)
wc = wc->next;
line++;
continue;
}
/* handle lines normally */
if (wc->char_pos < 0) {
//empty line
wc = wc->next;
line++;
continue;
}
WordCache *from = wc;
WordCache *to = wc;
int taken = 0;
int spaces = 0;
while (to && to->char_pos >= 0) {
taken += to->pixel_width;
if (to != from && to->space_count) {
spaces += to->space_count;
}
to = to->next;
}
bool can_fill = to && to->char_pos == WordCache::CHAR_WRAPLINE;
float x_ofs = 0;
switch (align) {
case ALIGN_FILL:
case ALIGN_LEFT: {
x_ofs = style->get_offset().x;
} break;
case ALIGN_CENTER: {
x_ofs = int(size.width - (taken + spaces * space_w)) / 2;
} break;
case ALIGN_RIGHT: {
x_ofs = int(size.width - style->get_margin(MARGIN_RIGHT) - (taken + spaces * space_w));
} break;
}
float y_ofs = style->get_offset().y;
y_ofs += (line - lines_skipped) * font_h + font->get_ascent();
y_ofs += vbegin + line * vsep;
while (from != to) {
// draw a word
int pos = from->char_pos;
if (from->char_pos < 0) {
ERR_PRINT("BUG");
return;
}
if (from->space_count) {
/* spacing */
x_ofs += space_w * from->space_count;
if (can_fill && align == ALIGN_FILL && spaces) {
x_ofs += int((size.width - (taken + space_w * spaces)) / spaces);
}
}
if (font_color_shadow.a > 0) {
int chars_total_shadow = chars_total; //save chars drawn
float x_ofs_shadow = x_ofs;
for (int i = 0; i < from->word_len; i++) {
if (visible_chars < 0 || chars_total_shadow < visible_chars) {
CharType c = xl_text[i + pos];
CharType n = xl_text[i + pos + 1];
if (uppercase) {
c = String::char_uppercase(c);
n = String::char_uppercase(n);
}
float move = drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + shadow_ofs, c, n, font_color_shadow);
if (use_outline) {
drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + Vector2(-shadow_ofs.x, shadow_ofs.y), c, n, font_color_shadow);
drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + Vector2(shadow_ofs.x, -shadow_ofs.y), c, n, font_color_shadow);
drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + Vector2(-shadow_ofs.x, -shadow_ofs.y), c, n, font_color_shadow);
}
x_ofs_shadow += move;
chars_total_shadow++;
}
}
}
for (int i = 0; i < from->word_len; i++) {
if (visible_chars < 0 || chars_total < visible_chars) {
CharType c = xl_text[i + pos];
CharType n = xl_text[i + pos + 1];
if (uppercase) {
c = String::char_uppercase(c);
n = String::char_uppercase(n);
}
x_ofs += drawer.draw_char(ci, Point2(x_ofs, y_ofs), c, n, font_color);
chars_total++;
}
}
from = from->next;
}
wc = to ? to->next : 0;
line++;
}
}
if (p_what == NOTIFICATION_THEME_CHANGED) {
word_cache_dirty = true;
update();
}
if (p_what == NOTIFICATION_RESIZED) {
word_cache_dirty = true;
}
}
Size2 Label::get_minimum_size() const {
Size2 min_style = get_stylebox("normal")->get_minimum_size();
// don't want to mutable everything
if (word_cache_dirty) {
const_cast<Label *>(this)->regenerate_word_cache();
}
if (autowrap)
return Size2(1, clip ? 1 : minsize.height) + min_style;
else {
Size2 ms = minsize;
if (clip)
ms.width = 1;
return ms + min_style;
}
}
int Label::get_longest_line_width() const {
Ref<Font> font = get_font("font");
real_t max_line_width = 0;
real_t line_width = 0;
for (int i = 0; i < xl_text.size(); i++) {
CharType current = xl_text[i];
if (uppercase)
current = String::char_uppercase(current);
if (current < 32) {
if (current == '\n') {
if (line_width > max_line_width)
max_line_width = line_width;
line_width = 0;
}
} else {
real_t char_width = font->get_char_size(current, xl_text[i + 1]).width;
line_width += char_width;
}
}
if (line_width > max_line_width)
max_line_width = line_width;
// ceiling to ensure autowrapping does not cut text
return Math::ceil(max_line_width);
}
int Label::get_line_count() const {
if (!is_inside_tree())
return 1;
if (word_cache_dirty)
const_cast<Label *>(this)->regenerate_word_cache();
return line_count;
}
int Label::get_visible_line_count() const {
int line_spacing = get_constant("line_spacing");
int font_h = get_font("font")->get_height() + line_spacing;
int lines_visible = (get_size().height - get_stylebox("normal")->get_minimum_size().height + line_spacing) / font_h;
if (lines_visible > line_count)
lines_visible = line_count;
if (max_lines_visible >= 0 && lines_visible > max_lines_visible)
lines_visible = max_lines_visible;
return lines_visible;
}
void Label::regenerate_word_cache() {
while (word_cache) {
WordCache *current = word_cache;
word_cache = current->next;
memdelete(current);
}
int width;
if (autowrap) {
Ref<StyleBox> style = get_stylebox("normal");
width = MAX(get_size().width, get_custom_minimum_size().width) - style->get_minimum_size().width;
} else {
width = get_longest_line_width();
}
Ref<Font> font = get_font("font");
real_t current_word_size = 0;
int word_pos = 0;
real_t line_width = 0;
int space_count = 0;
real_t space_width = font->get_char_size(' ').width;
int line_spacing = get_constant("line_spacing");
line_count = 1;
total_char_cache = 0;
WordCache *last = NULL;
for (int i = 0; i <= xl_text.length(); i++) {
CharType current = i < xl_text.length() ? xl_text[i] : L' '; //always a space at the end, so the algo works
if (uppercase)
current = String::char_uppercase(current);
// ranges taken from http://www.unicodemap.org/
// if your language is not well supported, consider helping improve
// the unicode support in Godot.
bool separatable = (current >= 0x2E08 && current <= 0xFAFF) || (current >= 0xFE30 && current <= 0xFE4F);
//current>=33 && (current < 65||current >90) && (current<97||current>122) && (current<48||current>57);
bool insert_newline = false;
real_t char_width = 0;
if (current < 33) {
if (current_word_size > 0) {
WordCache *wc = memnew(WordCache);
if (word_cache) {
last->next = wc;
} else {
word_cache = wc;
}
last = wc;
wc->pixel_width = current_word_size;
wc->char_pos = word_pos;
wc->word_len = i - word_pos;
wc->space_count = space_count;
current_word_size = 0;
space_count = 0;
}
if (current == '\n') {
insert_newline = true;
} else if (current != ' ') {
total_char_cache++;
}
if (i < xl_text.length() && xl_text[i] == ' ') {
if (line_width > 0 || last == NULL || last->char_pos != WordCache::CHAR_WRAPLINE) {
space_count++;
line_width += space_width;
} else {
space_count = 0;
}
}
} else {
// latin characters
if (current_word_size == 0) {
word_pos = i;
}
char_width = font->get_char_size(current, xl_text[i + 1]).width;
current_word_size += char_width;
line_width += char_width;
total_char_cache++;
// allow autowrap to cut words when they exceed line width
if (autowrap && (current_word_size > width)) {
separatable = true;
}
}
if ((autowrap && (line_width >= width) && ((last && last->char_pos >= 0) || separatable)) || insert_newline) {
if (separatable) {
if (current_word_size > 0) {
WordCache *wc = memnew(WordCache);
if (word_cache) {
last->next = wc;
} else {
word_cache = wc;
}
last = wc;
wc->pixel_width = current_word_size - char_width;
wc->char_pos = word_pos;
wc->word_len = i - word_pos;
wc->space_count = space_count;
current_word_size = char_width;
word_pos = i;
}
}
WordCache *wc = memnew(WordCache);
if (word_cache) {
last->next = wc;
} else {
word_cache = wc;
}
last = wc;
wc->pixel_width = 0;
wc->char_pos = insert_newline ? WordCache::CHAR_NEWLINE : WordCache::CHAR_WRAPLINE;
line_width = current_word_size;
line_count++;
space_count = 0;
}
}
if (!autowrap)
minsize.width = width;
if (max_lines_visible > 0 && line_count > max_lines_visible) {
minsize.height = (font->get_height() * max_lines_visible) + (line_spacing * (max_lines_visible - 1));
} else {
minsize.height = (font->get_height() * line_count) + (line_spacing * (line_count - 1));
}
if (!autowrap || !clip) {
//helps speed up some labels that may change a lot, as no resizing is requested. Do not change.
minimum_size_changed();
}
word_cache_dirty = false;
}
void Label::set_align(Align p_align) {
ERR_FAIL_INDEX((int)p_align, 4);
align = p_align;
update();
}
Label::Align Label::get_align() const {
return align;
}
void Label::set_valign(VAlign p_align) {
ERR_FAIL_INDEX((int)p_align, 4);
valign = p_align;
update();
}
Label::VAlign Label::get_valign() const {
return valign;
}
void Label::set_text(const String &p_string) {
if (text == p_string)
return;
text = p_string;
xl_text = tr(p_string);
word_cache_dirty = true;
if (percent_visible < 1)
visible_chars = get_total_character_count() * percent_visible;
update();
}
void Label::set_clip_text(bool p_clip) {
clip = p_clip;
update();
minimum_size_changed();
}
bool Label::is_clipping_text() const {
return clip;
}
String Label::get_text() const {
return text;
}
void Label::set_visible_characters(int p_amount) {
visible_chars = p_amount;
if (get_total_character_count() > 0) {
percent_visible = (float)p_amount / (float)total_char_cache;
}
_change_notify("percent_visible");
update();
}
int Label::get_visible_characters() const {
return visible_chars;
}
void Label::set_percent_visible(float p_percent) {
if (p_percent < 0 || p_percent >= 1) {
visible_chars = -1;
percent_visible = 1;
} else {
visible_chars = get_total_character_count() * p_percent;
percent_visible = p_percent;
}
_change_notify("visible_chars");
update();
}
float Label::get_percent_visible() const {
return percent_visible;
}
void Label::set_lines_skipped(int p_lines) {
lines_skipped = p_lines;
update();
}
int Label::get_lines_skipped() const {
return lines_skipped;
}
void Label::set_max_lines_visible(int p_lines) {
max_lines_visible = p_lines;
update();
}
int Label::get_max_lines_visible() const {
return max_lines_visible;
}
int Label::get_total_character_count() const {
if (word_cache_dirty)
const_cast<Label *>(this)->regenerate_word_cache();
return total_char_cache;
}
void Label::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_align", "align"), &Label::set_align);
ClassDB::bind_method(D_METHOD("get_align"), &Label::get_align);
ClassDB::bind_method(D_METHOD("set_valign", "valign"), &Label::set_valign);
ClassDB::bind_method(D_METHOD("get_valign"), &Label::get_valign);
ClassDB::bind_method(D_METHOD("set_text", "text"), &Label::set_text);
ClassDB::bind_method(D_METHOD("get_text"), &Label::get_text);
ClassDB::bind_method(D_METHOD("set_autowrap", "enable"), &Label::set_autowrap);
ClassDB::bind_method(D_METHOD("has_autowrap"), &Label::has_autowrap);
ClassDB::bind_method(D_METHOD("set_clip_text", "enable"), &Label::set_clip_text);
ClassDB::bind_method(D_METHOD("is_clipping_text"), &Label::is_clipping_text);
ClassDB::bind_method(D_METHOD("set_uppercase", "enable"), &Label::set_uppercase);
ClassDB::bind_method(D_METHOD("is_uppercase"), &Label::is_uppercase);
ClassDB::bind_method(D_METHOD("get_line_height"), &Label::get_line_height);
ClassDB::bind_method(D_METHOD("get_line_count"), &Label::get_line_count);
ClassDB::bind_method(D_METHOD("get_visible_line_count"), &Label::get_visible_line_count);
ClassDB::bind_method(D_METHOD("get_total_character_count"), &Label::get_total_character_count);
ClassDB::bind_method(D_METHOD("set_visible_characters", "amount"), &Label::set_visible_characters);
ClassDB::bind_method(D_METHOD("get_visible_characters"), &Label::get_visible_characters);
ClassDB::bind_method(D_METHOD("set_percent_visible", "percent_visible"), &Label::set_percent_visible);
ClassDB::bind_method(D_METHOD("get_percent_visible"), &Label::get_percent_visible);
ClassDB::bind_method(D_METHOD("set_lines_skipped", "lines_skipped"), &Label::set_lines_skipped);
ClassDB::bind_method(D_METHOD("get_lines_skipped"), &Label::get_lines_skipped);
ClassDB::bind_method(D_METHOD("set_max_lines_visible", "lines_visible"), &Label::set_max_lines_visible);
ClassDB::bind_method(D_METHOD("get_max_lines_visible"), &Label::get_max_lines_visible);
BIND_ENUM_CONSTANT(ALIGN_LEFT);
BIND_ENUM_CONSTANT(ALIGN_CENTER);
BIND_ENUM_CONSTANT(ALIGN_RIGHT);
BIND_ENUM_CONSTANT(ALIGN_FILL);
BIND_ENUM_CONSTANT(VALIGN_TOP);
BIND_ENUM_CONSTANT(VALIGN_CENTER);
BIND_ENUM_CONSTANT(VALIGN_BOTTOM);
BIND_ENUM_CONSTANT(VALIGN_FILL);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "text", PROPERTY_HINT_MULTILINE_TEXT, "", PROPERTY_USAGE_DEFAULT_INTL), "set_text", "get_text");
ADD_PROPERTY(PropertyInfo(Variant::INT, "align", PROPERTY_HINT_ENUM, "Left,Center,Right,Fill"), "set_align", "get_align");
ADD_PROPERTY(PropertyInfo(Variant::INT, "valign", PROPERTY_HINT_ENUM, "Top,Center,Bottom,Fill"), "set_valign", "get_valign");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "autowrap"), "set_autowrap", "has_autowrap");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "clip_text"), "set_clip_text", "is_clipping_text");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "uppercase"), "set_uppercase", "is_uppercase");
ADD_PROPERTY(PropertyInfo(Variant::INT, "visible_characters", PROPERTY_HINT_RANGE, "-1,128000,1", PROPERTY_USAGE_EDITOR), "set_visible_characters", "get_visible_characters");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "percent_visible", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_percent_visible", "get_percent_visible");
ADD_PROPERTY(PropertyInfo(Variant::INT, "lines_skipped", PROPERTY_HINT_RANGE, "0,999,1"), "set_lines_skipped", "get_lines_skipped");
ADD_PROPERTY(PropertyInfo(Variant::INT, "max_lines_visible", PROPERTY_HINT_RANGE, "-1,999,1"), "set_max_lines_visible", "get_max_lines_visible");
}
Label::Label(const String &p_text) {
align = ALIGN_LEFT;
valign = VALIGN_TOP;
xl_text = "";
word_cache = NULL;
word_cache_dirty = true;
autowrap = false;
line_count = 0;
set_v_size_flags(0);
clip = false;
set_mouse_filter(MOUSE_FILTER_IGNORE);
total_char_cache = 0;
visible_chars = -1;
percent_visible = 1;
lines_skipped = 0;
max_lines_visible = -1;
set_text(p_text);
uppercase = false;
set_v_size_flags(SIZE_SHRINK_CENTER);
}
Label::~Label() {
while (word_cache) {
WordCache *current = word_cache;
word_cache = current->next;
memdelete(current);
}
}
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