minetest/src/gui/guiHyperText.cpp
DS 0ac999ded7
Add scroll_container formspec element (redo) (#9101)
New formspec elements:

 - `scroll_container[<X>,<Y>;<W>,<H>;<scrollbar name>;<orientation>;<scroll factor>]`
 - `scroll_container_end[]`

Other elements can be embedded in this element. Scrollbar must be placed manually.
2020-04-13 10:50:07 +02:00

1161 lines
28 KiB
C++

/*
Minetest
Copyright (C) 2019 EvicenceBKidscode / Pierre-Yves Rollo <dev@pyrollo.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "IGUIEnvironment.h"
#include "IGUIElement.h"
#include "guiScrollBar.h"
#include "IGUIFont.h"
#include <vector>
#include <list>
#include <unordered_map>
using namespace irr::gui;
#include "client/fontengine.h"
#include <SColor.h>
#include "client/tile.h"
#include "IVideoDriver.h"
#include "client/client.h"
#include "client/renderingengine.h"
#include "hud.h"
#include "guiHyperText.h"
#include "util/string.h"
bool check_color(const std::string &str)
{
irr::video::SColor color;
return parseColorString(str, color, false);
}
bool check_integer(const std::string &str)
{
if (str.empty())
return false;
char *endptr = nullptr;
strtol(str.c_str(), &endptr, 10);
return *endptr == '\0';
}
// -----------------------------------------------------------------------------
// ParsedText - A text parser
void ParsedText::Element::setStyle(StyleList &style)
{
this->underline = is_yes(style["underline"]);
video::SColor color;
if (parseColorString(style["color"], color, false))
this->color = color;
if (parseColorString(style["hovercolor"], color, false))
this->hovercolor = color;
unsigned int font_size = std::atoi(style["fontsize"].c_str());
FontMode font_mode = FM_Standard;
if (style["fontstyle"] == "mono")
font_mode = FM_Mono;
FontSpec spec(font_size, font_mode,
is_yes(style["bold"]), is_yes(style["italic"]));
// TODO: find a way to check font validity
// Build a new fontengine ?
this->font = g_fontengine->getFont(spec);
if (!this->font)
printf("No font found ! Size=%d, mode=%d, bold=%s, italic=%s\n",
font_size, font_mode, style["bold"].c_str(),
style["italic"].c_str());
}
void ParsedText::Paragraph::setStyle(StyleList &style)
{
if (style["halign"] == "center")
this->halign = HALIGN_CENTER;
else if (style["halign"] == "right")
this->halign = HALIGN_RIGHT;
else if (style["halign"] == "justify")
this->halign = HALIGN_JUSTIFY;
else
this->halign = HALIGN_LEFT;
}
ParsedText::ParsedText(const wchar_t *text)
{
// Default style
m_root_tag.name = "root";
m_root_tag.style["fontsize"] = "16";
m_root_tag.style["fontstyle"] = "normal";
m_root_tag.style["bold"] = "false";
m_root_tag.style["italic"] = "false";
m_root_tag.style["underline"] = "false";
m_root_tag.style["halign"] = "left";
m_root_tag.style["color"] = "#EEEEEE";
m_root_tag.style["hovercolor"] = "#FF0000";
m_active_tags.push_front(&m_root_tag);
m_style = m_root_tag.style;
// Default simple tags definitions
StyleList style;
style["color"] = "#0000FF";
style["underline"] = "true";
m_elementtags["action"] = style;
style.clear();
style["bold"] = "true";
m_elementtags["b"] = style;
style.clear();
style["italic"] = "true";
m_elementtags["i"] = style;
style.clear();
style["underline"] = "true";
m_elementtags["u"] = style;
style.clear();
style["fontstyle"] = "mono";
m_elementtags["mono"] = style;
style.clear();
style["fontsize"] = m_root_tag.style["fontsize"];
m_elementtags["normal"] = style;
style.clear();
style["fontsize"] = "24";
m_elementtags["big"] = style;
style.clear();
style["fontsize"] = "36";
m_elementtags["bigger"] = style;
style.clear();
style["halign"] = "center";
m_paragraphtags["center"] = style;
style.clear();
style["halign"] = "justify";
m_paragraphtags["justify"] = style;
style.clear();
style["halign"] = "left";
m_paragraphtags["left"] = style;
style.clear();
style["halign"] = "right";
m_paragraphtags["right"] = style;
style.clear();
m_element = NULL;
m_paragraph = NULL;
m_end_paragraph_reason = ER_NONE;
parse(text);
}
ParsedText::~ParsedText()
{
for (auto &tag : m_not_root_tags)
delete tag;
}
void ParsedText::parse(const wchar_t *text)
{
wchar_t c;
u32 cursor = 0;
bool escape = false;
while ((c = text[cursor]) != L'\0') {
cursor++;
if (c == L'\r') { // Mac or Windows breaks
if (text[cursor] == L'\n')
cursor++;
// If text has begun, don't skip empty line
if (m_paragraph) {
endParagraph(ER_NEWLINE);
enterElement(ELEMENT_SEPARATOR);
}
escape = false;
continue;
}
if (c == L'\n') { // Unix breaks
// If text has begun, don't skip empty line
if (m_paragraph) {
endParagraph(ER_NEWLINE);
enterElement(ELEMENT_SEPARATOR);
}
escape = false;
continue;
}
if (escape) {
escape = false;
pushChar(c);
continue;
}
if (c == L'\\') {
escape = true;
continue;
}
// Tag check
if (c == L'<') {
u32 newcursor = parseTag(text, cursor);
if (newcursor > 0) {
cursor = newcursor;
continue;
}
}
// Default behavior
pushChar(c);
}
endParagraph(ER_NONE);
}
void ParsedText::endElement()
{
m_element = NULL;
}
void ParsedText::endParagraph(EndReason reason)
{
if (!m_paragraph)
return;
EndReason previous = m_end_paragraph_reason;
m_end_paragraph_reason = reason;
if (m_empty_paragraph && (reason == ER_TAG ||
(reason == ER_NEWLINE && previous == ER_TAG))) {
// Ignore last empty paragraph
m_paragraph = nullptr;
m_paragraphs.pop_back();
return;
}
endElement();
m_paragraph = NULL;
}
void ParsedText::enterParagraph()
{
if (!m_paragraph) {
m_paragraphs.emplace_back();
m_paragraph = &m_paragraphs.back();
m_paragraph->setStyle(m_style);
m_empty_paragraph = true;
}
}
void ParsedText::enterElement(ElementType type)
{
enterParagraph();
if (!m_element || m_element->type != type) {
m_paragraph->elements.emplace_back();
m_element = &m_paragraph->elements.back();
m_element->type = type;
m_element->tags = m_active_tags;
m_element->setStyle(m_style);
}
}
void ParsedText::pushChar(wchar_t c)
{
// New word if needed
if (c == L' ' || c == L'\t') {
if (!m_empty_paragraph)
enterElement(ELEMENT_SEPARATOR);
else
return;
} else {
m_empty_paragraph = false;
enterElement(ELEMENT_TEXT);
}
m_element->text += c;
}
ParsedText::Tag *ParsedText::newTag(const std::string &name, const AttrsList &attrs)
{
endElement();
Tag *newtag = new Tag();
newtag->name = name;
newtag->attrs = attrs;
m_not_root_tags.push_back(newtag);
return newtag;
}
ParsedText::Tag *ParsedText::openTag(const std::string &name, const AttrsList &attrs)
{
Tag *newtag = newTag(name, attrs);
m_active_tags.push_front(newtag);
return newtag;
}
bool ParsedText::closeTag(const std::string &name)
{
bool found = false;
for (auto id = m_active_tags.begin(); id != m_active_tags.end(); ++id)
if ((*id)->name == name) {
m_active_tags.erase(id);
found = true;
break;
}
return found;
}
void ParsedText::parseGenericStyleAttr(
const std::string &name, const std::string &value, StyleList &style)
{
// Color styles
if (name == "color" || name == "hovercolor") {
if (check_color(value))
style[name] = value;
// Boolean styles
} else if (name == "bold" || name == "italic" || name == "underline") {
style[name] = is_yes(value);
} else if (name == "size") {
if (check_integer(value))
style["fontsize"] = value;
} else if (name == "font") {
if (value == "mono" || value == "normal")
style["fontstyle"] = value;
}
}
void ParsedText::parseStyles(const AttrsList &attrs, StyleList &style)
{
for (auto const &attr : attrs)
parseGenericStyleAttr(attr.first, attr.second, style);
}
void ParsedText::globalTag(const AttrsList &attrs)
{
for (const auto &attr : attrs) {
// Only page level style
if (attr.first == "margin") {
if (check_integer(attr.second))
margin = stoi(attr.second.c_str());
} else if (attr.first == "valign") {
if (attr.second == "top")
valign = ParsedText::VALIGN_TOP;
else if (attr.second == "bottom")
valign = ParsedText::VALIGN_BOTTOM;
else if (attr.second == "middle")
valign = ParsedText::VALIGN_MIDDLE;
} else if (attr.first == "background") {
irr::video::SColor color;
if (attr.second == "none") {
background_type = BACKGROUND_NONE;
} else if (parseColorString(attr.second, color, false)) {
background_type = BACKGROUND_COLOR;
background_color = color;
}
// Inheriting styles
} else if (attr.first == "halign") {
if (attr.second == "left" || attr.second == "center" ||
attr.second == "right" ||
attr.second == "justify")
m_root_tag.style["halign"] = attr.second;
// Generic default styles
} else {
parseGenericStyleAttr(attr.first, attr.second, m_root_tag.style);
}
}
}
u32 ParsedText::parseTag(const wchar_t *text, u32 cursor)
{
// Tag name
bool end = false;
std::string name = "";
wchar_t c = text[cursor];
if (c == L'/') {
end = true;
c = text[++cursor];
if (c == L'\0')
return 0;
}
while (c != ' ' && c != '>') {
name += c;
c = text[++cursor];
if (c == L'\0')
return 0;
}
// Tag attributes
AttrsList attrs;
while (c != L'>') {
std::string attr_name = "";
core::stringw attr_val = L"";
while (c == ' ') {
c = text[++cursor];
if (c == L'\0' || c == L'=')
return 0;
}
while (c != L' ' && c != L'=') {
attr_name += (char)c;
c = text[++cursor];
if (c == L'\0' || c == L'>')
return 0;
}
while (c == L' ') {
c = text[++cursor];
if (c == L'\0' || c == L'>')
return 0;
}
if (c != L'=')
return 0;
c = text[++cursor];
if (c == L'\0')
return 0;
while (c != L'>' && c != L' ') {
attr_val += c;
c = text[++cursor];
if (c == L'\0')
return 0;
}
attrs[attr_name] = stringw_to_utf8(attr_val);
}
++cursor; // Last ">"
// Tag specific processing
StyleList style;
if (name == "global") {
if (end)
return 0;
globalTag(attrs);
} else if (name == "style") {
if (end) {
closeTag(name);
} else {
parseStyles(attrs, style);
openTag(name, attrs)->style = style;
}
endElement();
} else if (name == "img" || name == "item") {
if (end)
return 0;
// Name is a required attribute
if (!attrs.count("name"))
return 0;
// Rotate attribute is only for <item>
if (attrs.count("rotate") && name != "item")
return 0;
// Angle attribute is only for <item>
if (attrs.count("angle") && name != "item")
return 0;
// Ok, element can be created
newTag(name, attrs);
if (name == "img")
enterElement(ELEMENT_IMAGE);
else
enterElement(ELEMENT_ITEM);
m_element->text = utf8_to_stringw(attrs["name"]);
if (attrs.count("float")) {
if (attrs["float"] == "left")
m_element->floating = FLOAT_LEFT;
if (attrs["float"] == "right")
m_element->floating = FLOAT_RIGHT;
}
if (attrs.count("width")) {
int width = stoi(attrs["width"]);
if (width > 0)
m_element->dim.Width = width;
}
if (attrs.count("height")) {
int height = stoi(attrs["height"]);
if (height > 0)
m_element->dim.Height = height;
}
if (attrs.count("angle")) {
std::string str = attrs["angle"];
std::vector<std::string> parts = split(str, ',');
if (parts.size() == 3) {
m_element->angle = v3s16(
rangelim(stoi(parts[0]), -180, 180),
rangelim(stoi(parts[1]), -180, 180),
rangelim(stoi(parts[2]), -180, 180));
m_element->rotation = v3s16(0, 0, 0);
}
}
if (attrs.count("rotate")) {
if (attrs["rotate"] == "yes") {
m_element->rotation = v3s16(0, 100, 0);
} else {
std::string str = attrs["rotate"];
std::vector<std::string> parts = split(str, ',');
if (parts.size() == 3) {
m_element->rotation = v3s16 (
rangelim(stoi(parts[0]), -1000, 1000),
rangelim(stoi(parts[1]), -1000, 1000),
rangelim(stoi(parts[2]), -1000, 1000));
}
}
}
endElement();
} else if (name == "tag") {
// Required attributes
if (!attrs.count("name"))
return 0;
StyleList tagstyle;
parseStyles(attrs, tagstyle);
if (is_yes(attrs["paragraph"]))
m_paragraphtags[attrs["name"]] = tagstyle;
else
m_elementtags[attrs["name"]] = tagstyle;
} else if (name == "action") {
if (end) {
closeTag(name);
} else {
if (!attrs.count("name"))
return 0;
openTag(name, attrs)->style = m_elementtags["action"];
}
} else if (m_elementtags.count(name)) {
if (end) {
closeTag(name);
} else {
openTag(name, attrs)->style = m_elementtags[name];
}
endElement();
} else if (m_paragraphtags.count(name)) {
if (end) {
closeTag(name);
} else {
openTag(name, attrs)->style = m_paragraphtags[name];
}
endParagraph(ER_TAG);
} else
return 0; // Unknown tag
// Update styles accordingly
m_style.clear();
for (auto tag = m_active_tags.crbegin(); tag != m_active_tags.crend(); ++tag)
for (const auto &prop : (*tag)->style)
m_style[prop.first] = prop.second;
return cursor;
}
// -----------------------------------------------------------------------------
// Text Drawer
TextDrawer::TextDrawer(const wchar_t *text, Client *client,
gui::IGUIEnvironment *environment, ISimpleTextureSource *tsrc) :
m_text(text),
m_client(client), m_environment(environment)
{
// Size all elements
for (auto &p : m_text.m_paragraphs) {
for (auto &e : p.elements) {
switch (e.type) {
case ParsedText::ELEMENT_SEPARATOR:
case ParsedText::ELEMENT_TEXT:
if (e.font) {
e.dim.Width = e.font->getDimension(e.text.c_str()).Width;
e.dim.Height = e.font->getDimension(L"Yy").Height;
#if USE_FREETYPE
if (e.font->getType() == irr::gui::EGFT_CUSTOM) {
e.baseline = e.dim.Height - 1 -
((irr::gui::CGUITTFont *)e.font)->getAscender() / 64;
}
#endif
} else {
e.dim = {0, 0};
}
break;
case ParsedText::ELEMENT_IMAGE:
case ParsedText::ELEMENT_ITEM:
// Resize only non sized items
if (e.dim.Height != 0 && e.dim.Width != 0)
break;
// Default image and item size
core::dimension2d<u32> dim(80, 80);
if (e.type == ParsedText::ELEMENT_IMAGE) {
video::ITexture *texture =
m_client->getTextureSource()->
getTexture(stringw_to_utf8(e.text));
if (texture)
dim = texture->getOriginalSize();
}
if (e.dim.Height == 0)
if (e.dim.Width == 0)
e.dim = dim;
else
e.dim.Height = dim.Height * e.dim.Width /
dim.Width;
else
e.dim.Width = dim.Width * e.dim.Height /
dim.Height;
break;
}
}
}
}
// Get element at given coordinates. Coordinates are inner coordinates (starting
// at 0,0).
ParsedText::Element *TextDrawer::getElementAt(core::position2d<s32> pos)
{
pos.Y -= m_voffset;
for (auto &p : m_text.m_paragraphs) {
for (auto &el : p.elements) {
core::rect<s32> rect(el.pos, el.dim);
if (rect.isPointInside(pos))
return &el;
}
}
return 0;
}
/*
This function places all elements according to given width. Elements have
been previously sized by constructor and will be later drawed by draw.
It may be called each time width changes and resulting height can be
retrieved using getHeight. See GUIHyperText constructor, it uses it once to
test if text fits in window and eventually another time if width is reduced
m_floating because of scrollbar added.
*/
void TextDrawer::place(const core::rect<s32> &dest_rect)
{
m_floating.clear();
s32 y = 0;
s32 ymargin = m_text.margin;
// Iterator used :
// p - Current paragraph, walked only once
// el - Current element, walked only once
// e and f - local element and floating operators
for (auto &p : m_text.m_paragraphs) {
// Find and place floating stuff in paragraph
for (auto e = p.elements.begin(); e != p.elements.end(); ++e) {
if (e->floating != ParsedText::FLOAT_NONE) {
if (y)
e->pos.Y = y + std::max(ymargin, e->margin);
else
e->pos.Y = ymargin;
if (e->floating == ParsedText::FLOAT_LEFT)
e->pos.X = m_text.margin;
if (e->floating == ParsedText::FLOAT_RIGHT)
e->pos.X = dest_rect.getWidth() - e->dim.Width -
m_text.margin;
RectWithMargin floating;
floating.rect = core::rect<s32>(e->pos, e->dim);
floating.margin = e->margin;
m_floating.push_back(floating);
}
}
if (y)
y = y + std::max(ymargin, p.margin);
ymargin = p.margin;
// Place non floating stuff
std::vector<ParsedText::Element>::iterator el = p.elements.begin();
while (el != p.elements.end()) {
// Determine line width and y pos
s32 left, right;
s32 nexty = y;
do {
y = nexty;
nexty = 0;
// Inner left & right
left = m_text.margin;
right = dest_rect.getWidth() - m_text.margin;
for (const auto &f : m_floating) {
// Does floating rect intersect paragraph y line?
if (f.rect.UpperLeftCorner.Y - f.margin <= y &&
f.rect.LowerRightCorner.Y + f.margin >= y) {
// Next Y to try if no room left
if (!nexty || f.rect.LowerRightCorner.Y +
std::max(f.margin, p.margin) < nexty) {
nexty = f.rect.LowerRightCorner.Y +
std::max(f.margin, p.margin) + 1;
}
if (f.rect.UpperLeftCorner.X - f.margin <= left &&
f.rect.LowerRightCorner.X + f.margin < right) {
// float on left
if (f.rect.LowerRightCorner.X +
std::max(f.margin, p.margin) > left) {
left = f.rect.LowerRightCorner.X +
std::max(f.margin, p.margin);
}
} else if (f.rect.LowerRightCorner.X + f.margin >= right &&
f.rect.UpperLeftCorner.X - f.margin > left) {
// float on right
if (f.rect.UpperLeftCorner.X -
std::max(f.margin, p.margin) < right)
right = f.rect.UpperLeftCorner.X -
std::max(f.margin, p.margin);
} else if (f.rect.UpperLeftCorner.X - f.margin <= left &&
f.rect.LowerRightCorner.X + f.margin >= right) {
// float taking all space
left = right;
}
else
{ // float in the middle -- should not occure yet, see that later
}
}
}
} while (nexty && right <= left);
u32 linewidth = right - left;
float x = left;
u32 charsheight = 0;
u32 charswidth = 0;
u32 wordcount = 0;
// Skip begining of line separators but include them in height
// computation.
while (el != p.elements.end() &&
el->type == ParsedText::ELEMENT_SEPARATOR) {
if (el->floating == ParsedText::FLOAT_NONE) {
el->drawwidth = 0;
if (charsheight < el->dim.Height)
charsheight = el->dim.Height;
}
el++;
}
std::vector<ParsedText::Element>::iterator linestart = el;
std::vector<ParsedText::Element>::iterator lineend = p.elements.end();
// First pass, find elements fitting into line
// (or at least one element)
while (el != p.elements.end() && (charswidth == 0 ||
charswidth + el->dim.Width <= linewidth)) {
if (el->floating == ParsedText::FLOAT_NONE) {
if (el->type != ParsedText::ELEMENT_SEPARATOR) {
lineend = el;
wordcount++;
}
charswidth += el->dim.Width;
if (charsheight < el->dim.Height)
charsheight = el->dim.Height;
}
el++;
}
// Empty line, nothing to place only go down line height
if (lineend == p.elements.end()) {
y += charsheight;
continue;
}
// Point to the first position outside line (may be end())
lineend++;
// Second pass, compute printable line width and adjustments
charswidth = 0;
s32 top = 0;
s32 bottom = 0;
for (auto e = linestart; e != lineend; ++e) {
if (e->floating == ParsedText::FLOAT_NONE) {
charswidth += e->dim.Width;
if (top < (s32)e->dim.Height - e->baseline)
top = e->dim.Height - e->baseline;
if (bottom < e->baseline)
bottom = e->baseline;
}
}
float extraspace = 0.f;
switch (p.halign) {
case ParsedText::HALIGN_CENTER:
x += (linewidth - charswidth) / 2.f;
break;
case ParsedText::HALIGN_JUSTIFY:
if (wordcount > 1 && // Justification only if at least two words
!(lineend == p.elements.end())) // Don't justify last line
extraspace = ((float)(linewidth - charswidth)) / (wordcount - 1);
break;
case ParsedText::HALIGN_RIGHT:
x += linewidth - charswidth;
break;
case ParsedText::HALIGN_LEFT:
break;
}
// Third pass, actually place everything
for (auto e = linestart; e != lineend; ++e) {
if (e->floating != ParsedText::FLOAT_NONE)
continue;
e->pos.X = x;
e->pos.Y = y;
switch (e->type) {
case ParsedText::ELEMENT_TEXT:
case ParsedText::ELEMENT_SEPARATOR:
e->pos.X = x;
// Align char baselines
e->pos.Y = y + top + e->baseline - e->dim.Height;
x += e->dim.Width;
if (e->type == ParsedText::ELEMENT_SEPARATOR)
x += extraspace;
break;
case ParsedText::ELEMENT_IMAGE:
case ParsedText::ELEMENT_ITEM:
x += e->dim.Width;
break;
}
// Draw width for separator can be different than element
// width. This will be important for char effects like
// underline.
e->drawwidth = x - e->pos.X;
}
y += charsheight;
} // Elements (actually lines)
} // Paragraph
// Check if float goes under paragraph
for (const auto &f : m_floating) {
if (f.rect.LowerRightCorner.Y >= y)
y = f.rect.LowerRightCorner.Y;
}
m_height = y + m_text.margin;
// Compute vertical offset according to vertical alignment
if (m_height < dest_rect.getHeight())
switch (m_text.valign) {
case ParsedText::VALIGN_BOTTOM:
m_voffset = dest_rect.getHeight() - m_height;
break;
case ParsedText::VALIGN_MIDDLE:
m_voffset = (dest_rect.getHeight() - m_height) / 2;
break;
case ParsedText::VALIGN_TOP:
default:
m_voffset = 0;
}
else
m_voffset = 0;
}
// Draw text in a rectangle with a given offset. Items are actually placed in
// relative (to upper left corner) coordinates.
void TextDrawer::draw(const core::rect<s32> &clip_rect,
const core::position2d<s32> &dest_offset)
{
irr::video::IVideoDriver *driver = m_environment->getVideoDriver();
core::position2d<s32> offset = dest_offset;
offset.Y += m_voffset;
if (m_text.background_type == ParsedText::BACKGROUND_COLOR)
driver->draw2DRectangle(m_text.background_color, clip_rect);
for (auto &p : m_text.m_paragraphs) {
for (auto &el : p.elements) {
core::rect<s32> rect(el.pos + offset, el.dim);
if (!rect.isRectCollided(clip_rect))
continue;
switch (el.type) {
case ParsedText::ELEMENT_SEPARATOR:
case ParsedText::ELEMENT_TEXT: {
irr::video::SColor color = el.color;
for (auto tag : el.tags)
if (&(*tag) == m_hovertag)
color = el.hovercolor;
if (!el.font)
break;
if (el.type == ParsedText::ELEMENT_TEXT)
el.font->draw(el.text, rect, color, false, true,
&clip_rect);
if (el.underline && el.drawwidth) {
s32 linepos = el.pos.Y + offset.Y +
el.dim.Height - (el.baseline >> 1);
core::rect<s32> linerect(el.pos.X + offset.X,
linepos - (el.baseline >> 3) - 1,
el.pos.X + offset.X + el.drawwidth,
linepos + (el.baseline >> 3));
driver->draw2DRectangle(color, linerect, &clip_rect);
}
} break;
case ParsedText::ELEMENT_IMAGE: {
video::ITexture *texture =
m_client->getTextureSource()->getTexture(
stringw_to_utf8(el.text));
if (texture != 0)
m_environment->getVideoDriver()->draw2DImage(
texture, rect,
irr::core::rect<s32>(
core::position2d<s32>(0, 0),
texture->getOriginalSize()),
&clip_rect, 0, true);
} break;
case ParsedText::ELEMENT_ITEM: {
IItemDefManager *idef = m_client->idef();
ItemStack item;
item.deSerialize(stringw_to_utf8(el.text), idef);
drawItemStack(
m_environment->getVideoDriver(),
g_fontengine->getFont(), item, rect, &clip_rect,
m_client, IT_ROT_OTHER, el.angle, el.rotation
);
} break;
}
}
}
}
// -----------------------------------------------------------------------------
// GUIHyperText - The formated text area formspec item
//! constructor
GUIHyperText::GUIHyperText(const wchar_t *text, IGUIEnvironment *environment,
IGUIElement *parent, s32 id, const core::rect<s32> &rectangle,
Client *client, ISimpleTextureSource *tsrc) :
IGUIElement(EGUIET_ELEMENT, environment, parent, id, rectangle),
m_client(client), m_vscrollbar(nullptr),
m_drawer(text, client, environment, tsrc), m_text_scrollpos(0, 0)
{
#ifdef _DEBUG
setDebugName("GUIHyperText");
#endif
IGUISkin *skin = 0;
if (Environment)
skin = Environment->getSkin();
m_scrollbar_width = skin ? skin->getSize(gui::EGDS_SCROLLBAR_SIZE) : 16;
core::rect<s32> rect = irr::core::rect<s32>(
RelativeRect.getWidth() - m_scrollbar_width, 0,
RelativeRect.getWidth(), RelativeRect.getHeight());
m_vscrollbar = new GUIScrollBar(Environment, this, -1, rect, false, true);
m_vscrollbar->setVisible(false);
}
//! destructor
GUIHyperText::~GUIHyperText()
{
m_vscrollbar->remove();
m_vscrollbar->drop();
}
ParsedText::Element *GUIHyperText::getElementAt(s32 X, s32 Y)
{
core::position2d<s32> pos{X, Y};
pos -= m_display_text_rect.UpperLeftCorner;
pos -= m_text_scrollpos;
return m_drawer.getElementAt(pos);
}
void GUIHyperText::checkHover(s32 X, s32 Y)
{
m_drawer.m_hovertag = nullptr;
if (AbsoluteRect.isPointInside(core::position2d<s32>(X, Y))) {
ParsedText::Element *element = getElementAt(X, Y);
if (element) {
for (auto &tag : element->tags) {
if (tag->name == "action") {
m_drawer.m_hovertag = tag;
break;
}
}
}
}
#ifndef HAVE_TOUCHSCREENGUI
if (m_drawer.m_hovertag)
RenderingEngine::get_raw_device()->getCursorControl()->setActiveIcon(
gui::ECI_HAND);
else
RenderingEngine::get_raw_device()->getCursorControl()->setActiveIcon(
gui::ECI_NORMAL);
#endif
}
bool GUIHyperText::OnEvent(const SEvent &event)
{
// Scroll bar
if (event.EventType == EET_GUI_EVENT &&
event.GUIEvent.EventType == EGET_SCROLL_BAR_CHANGED &&
event.GUIEvent.Caller == m_vscrollbar) {
m_text_scrollpos.Y = -m_vscrollbar->getPos();
}
// Reset hover if element left
if (event.EventType == EET_GUI_EVENT &&
event.GUIEvent.EventType == EGET_ELEMENT_LEFT) {
m_drawer.m_hovertag = nullptr;
#ifndef HAVE_TOUCHSCREENGUI
gui::ICursorControl *cursor_control =
RenderingEngine::get_raw_device()->getCursorControl();
if (cursor_control->isVisible())
cursor_control->setActiveIcon(gui::ECI_NORMAL);
#endif
}
if (event.EventType == EET_MOUSE_INPUT_EVENT) {
if (event.MouseInput.Event == EMIE_MOUSE_MOVED)
checkHover(event.MouseInput.X, event.MouseInput.Y);
if (event.MouseInput.Event == EMIE_MOUSE_WHEEL) {
m_vscrollbar->setPos(m_vscrollbar->getPos() -
event.MouseInput.Wheel * m_vscrollbar->getSmallStep());
m_text_scrollpos.Y = -m_vscrollbar->getPos();
m_drawer.draw(m_display_text_rect, m_text_scrollpos);
checkHover(event.MouseInput.X, event.MouseInput.Y);
return true;
} else if (event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN) {
ParsedText::Element *element = getElementAt(
event.MouseInput.X, event.MouseInput.Y);
if (element) {
for (auto &tag : element->tags) {
if (tag->name == "action") {
Text = core::stringw(L"action:") +
utf8_to_stringw(tag->attrs["name"]);
if (Parent) {
SEvent newEvent;
newEvent.EventType = EET_GUI_EVENT;
newEvent.GUIEvent.Caller = this;
newEvent.GUIEvent.Element = 0;
newEvent.GUIEvent.EventType = EGET_BUTTON_CLICKED;
Parent->OnEvent(newEvent);
}
break;
}
}
}
}
}
return IGUIElement::OnEvent(event);
}
//! draws the element and its children
void GUIHyperText::draw()
{
if (!IsVisible)
return;
// Text
m_display_text_rect = AbsoluteRect;
m_drawer.place(m_display_text_rect);
// Show scrollbar if text overflow
if (m_drawer.getHeight() > m_display_text_rect.getHeight()) {
m_vscrollbar->setSmallStep(m_display_text_rect.getHeight() * 0.1f);
m_vscrollbar->setLargeStep(m_display_text_rect.getHeight() * 0.5f);
m_vscrollbar->setMax(m_drawer.getHeight() - m_display_text_rect.getHeight());
m_vscrollbar->setVisible(true);
m_vscrollbar->setPageSize(s32(m_drawer.getHeight()));
core::rect<s32> smaller_rect = m_display_text_rect;
smaller_rect.LowerRightCorner.X -= m_scrollbar_width;
m_drawer.place(smaller_rect);
} else {
m_vscrollbar->setMax(0);
m_vscrollbar->setPos(0);
m_vscrollbar->setVisible(false);
}
m_drawer.draw(AbsoluteClippingRect,
m_display_text_rect.UpperLeftCorner + m_text_scrollpos);
// draw children
IGUIElement::draw();
}