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virtualx-engine/scene/gui/label.cpp
Juan Linietsky 864c0e84de line/col label was changing size with each cursor move, forcing the GUI to resize upwards and costing considerably CPU usage. 
It has been changed so it won't resize the UI when modified.
This will make the code editor feel a lot smoother.
2016-07-09 14:56:08 -03:00

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/*************************************************************************/
/* label.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "print_string.h"
#include "globals.h"
#include "translation.h"
void Label::set_autowrap(bool p_autowrap) {
autowrap=p_autowrap;
word_cache_dirty=true;
minimum_size_changed();
update();
}
bool Label::has_autowrap() const {
return autowrap;
}
void Label::set_uppercase(bool p_uppercase) {
uppercase=p_uppercase;
word_cache_dirty=true;
minimum_size_changed();
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_DRAW) {
if (clip || autowrap)
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<Font> font = get_font("font");
Color font_color = get_color("font_color");
Color font_color_shadow = get_color("font_color_shadow");
bool use_outlinde = 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");
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;
int 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) / 2;
vsep=0;
} break;
case VALIGN_BOTTOM: {
vbegin=size.y - lines_visible * font_h;
vsep=0;
} break;
case VALIGN_FILL: {
vbegin=0;
if (lines_visible>1) {
vsep=(size.y - lines_visible * font_h) / (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);
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=0;
} break;
case ALIGN_CENTER: {
x_ofs=int(size.width-(taken+spaces*space_w))/2;;
} break;
case ALIGN_RIGHT: {
x_ofs=int(size.width-(taken+spaces*space_w));
} break;
}
int 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 = text[i+pos];
CharType n = text[i+pos+1];
if (uppercase) {
c=String::char_uppercase(c);
n=String::char_uppercase(c);
}
float move=font->draw_char(ci, Point2( x_ofs_shadow, y_ofs )+shadow_ofs, c, n,font_color_shadow );
if (use_outlinde) {
font->draw_char(ci, Point2( x_ofs_shadow, y_ofs )+Vector2(-shadow_ofs.x,shadow_ofs.y), c, n,font_color_shadow );
font->draw_char(ci, Point2( x_ofs_shadow, y_ofs )+Vector2(shadow_ofs.x,-shadow_ofs.y), c, n,font_color_shadow );
font->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 = text[i+pos];
CharType n = text[i+pos+1];
if (uppercase) {
c=String::char_uppercase(c);
n=String::char_uppercase(c);
}
x_ofs+=font->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 {
if (autowrap)
return Size2(1,1);
else {
// don't want to mutable everything
if(word_cache_dirty)
const_cast<Label*>(this)->regenerate_word_cache();
Size2 ms=minsize;
if (clip)
ms.width=1;
return ms;
}
}
int Label::get_longest_line_width() const {
Ref<Font> font = get_font("font");
int max_line_width=0;
int line_width=0;
for (int i=0;i<text.size();i++) {
CharType current=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 {
int char_width=font->get_char_size(current).width;
line_width+=char_width;
}
}
if (line_width>max_line_width)
max_line_width=line_width;
return 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;
}
void Label::regenerate_word_cache() {
while (word_cache) {
WordCache *current=word_cache;
word_cache=current->next;
memdelete( current );
}
int width=autowrap?get_size().width:get_longest_line_width();
Ref<Font> font = get_font("font");
int current_word_size=0;
int word_pos=0;
int line_width=0;
int space_count=0;
int 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<text.size()+1;i++) {
CharType current=i<text.length()?text[i]:' '; //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;
int char_width;
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 {
total_char_cache++;
}
if (i<text.length() && text[i] == ' ') {
total_char_cache--; // do not count spaces
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).width;
current_word_size+=char_width;
line_width+=char_width;
total_char_cache++;
}
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;
space_count=0;
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));
}
}
word_cache_dirty=false;
}
void Label::set_align(Align p_align) {
ERR_FAIL_INDEX(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(p_align,4);
valign=p_align;
update();
}
Label::VAlign Label::get_valign() const{
return valign;
}
void Label::set_text(const String& p_string) {
String str = XL_MESSAGE(p_string);
if (text==str)
return;
text=str;
word_cache_dirty=true;
if (percent_visible<1)
visible_chars=get_total_character_count()*percent_visible;
update();
if (!autowrap) {
minimum_size_changed();
}
}
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;
}
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;
}
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() {
ObjectTypeDB::bind_method(_MD("set_align","align"),&Label::set_align);
ObjectTypeDB::bind_method(_MD("get_align"),&Label::get_align);
ObjectTypeDB::bind_method(_MD("set_valign","valign"),&Label::set_valign);
ObjectTypeDB::bind_method(_MD("get_valign"),&Label::get_valign);
ObjectTypeDB::bind_method(_MD("set_text","text"),&Label::set_text);
ObjectTypeDB::bind_method(_MD("get_text"),&Label::get_text);
ObjectTypeDB::bind_method(_MD("set_autowrap","enable"),&Label::set_autowrap);
ObjectTypeDB::bind_method(_MD("has_autowrap"),&Label::has_autowrap);
ObjectTypeDB::bind_method(_MD("set_clip_text","enable"),&Label::set_clip_text);
ObjectTypeDB::bind_method(_MD("is_clipping_text"),&Label::is_clipping_text);
ObjectTypeDB::bind_method(_MD("set_uppercase","enable"),&Label::set_uppercase);
ObjectTypeDB::bind_method(_MD("is_uppercase"),&Label::is_uppercase);
ObjectTypeDB::bind_method(_MD("get_line_height"),&Label::get_line_height);
ObjectTypeDB::bind_method(_MD("get_line_count"),&Label::get_line_count);
ObjectTypeDB::bind_method(_MD("get_total_character_count"),&Label::get_total_character_count);
ObjectTypeDB::bind_method(_MD("set_visible_characters","amount"),&Label::set_visible_characters);
ObjectTypeDB::bind_method(_MD("get_visible_characters"),&Label::get_visible_characters);
ObjectTypeDB::bind_method(_MD("set_percent_visible","percent_visible"),&Label::set_percent_visible);
ObjectTypeDB::bind_method(_MD("get_percent_visible"),&Label::get_percent_visible);
ObjectTypeDB::bind_method(_MD("set_lines_skipped","lines_skipped"),&Label::set_lines_skipped);
ObjectTypeDB::bind_method(_MD("get_lines_skipped"),&Label::get_lines_skipped);
ObjectTypeDB::bind_method(_MD("set_max_lines_visible","lines_visible"),&Label::set_max_lines_visible);
ObjectTypeDB::bind_method(_MD("get_max_lines_visible"),&Label::get_max_lines_visible);
BIND_CONSTANT( ALIGN_LEFT );
BIND_CONSTANT( ALIGN_CENTER );
BIND_CONSTANT( ALIGN_RIGHT );
BIND_CONSTANT( ALIGN_FILL );
BIND_CONSTANT( VALIGN_TOP );
BIND_CONSTANT( VALIGN_CENTER );
BIND_CONSTANT( VALIGN_BOTTOM );
BIND_CONSTANT( VALIGN_FILL );
ADD_PROPERTYNZ( PropertyInfo( Variant::STRING, "text",PROPERTY_HINT_MULTILINE_TEXT,"",PROPERTY_USAGE_DEFAULT_INTL), _SCS("set_text"),_SCS("get_text") );
ADD_PROPERTYNZ( PropertyInfo( Variant::INT, "align", PROPERTY_HINT_ENUM,"Left,Center,Right,Fill" ),_SCS("set_align"),_SCS("get_align") );
ADD_PROPERTYNZ( PropertyInfo( Variant::INT, "valign", PROPERTY_HINT_ENUM,"Top,Center,Bottom,Fill" ),_SCS("set_valign"),_SCS("get_valign") );
ADD_PROPERTYNZ( PropertyInfo( Variant::BOOL, "autowrap"),_SCS("set_autowrap"),_SCS("has_autowrap") );
ADD_PROPERTYNZ( PropertyInfo( Variant::BOOL, "clip_text"),_SCS("set_clip_text"),_SCS("is_clipping_text") );
ADD_PROPERTYNZ( PropertyInfo( Variant::BOOL, "uppercase"),_SCS("set_uppercase"),_SCS("is_uppercase") );
ADD_PROPERTY( PropertyInfo( Variant::REAL, "percent_visible", PROPERTY_HINT_RANGE,"0,1,0.001"),_SCS("set_percent_visible"),_SCS("get_percent_visible") );
ADD_PROPERTY( PropertyInfo( Variant::INT, "lines_skipped", PROPERTY_HINT_RANGE,"0,999,1"),_SCS("set_lines_skipped"),_SCS("get_lines_skipped") );
ADD_PROPERTY( PropertyInfo( Variant::INT, "max_lines_visible", PROPERTY_HINT_RANGE,"-1,999,1"),_SCS("set_max_lines_visible"),_SCS("get_max_lines_visible") );
}
Label::Label(const String &p_text) {
align=ALIGN_LEFT;
valign=VALIGN_TOP;
text="";
word_cache=NULL;
word_cache_dirty=true;
autowrap=false;
line_count=0;
set_v_size_flags(0);
clip=false;
set_ignore_mouse(true);
total_char_cache=0;
visible_chars=-1;
percent_visible=1;
lines_skipped=0;
max_lines_visible=-1;
set_text(p_text);
uppercase=false;
}
Label::~Label() {
while (word_cache) {
WordCache *current=word_cache;
word_cache=current->next;
memdelete( current );
}
}
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