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#include "../include/ImagePreview.hpp"
#include "../include/Settings.hpp"
#include "../include/Gif.hpp"
#include <SFML/Graphics/RectangleShape.hpp>
#include <dchat/Process.hpp>
#include <cassert>
namespace dchat
{
static const float PADDING_VERTICAL = 40.0f;
static const float PADDING_HORIZONTAL = 40.0f;
static ImagePreview *instance = nullptr;
static std::string imagePreviewUrl;
ImagePreview* ImagePreview::getInstance()
{
if(!instance)
instance = new ImagePreview();
return instance;
}
void ImagePreview::preview(sf::Texture *texture, const std::string &url)
{
ImagePreview *instance = getInstance();
if(texture == instance->texture) return;
instance->texture = texture;
instance->contentType = texture ? ContentType::TEXTURE : ContentType::NONE;
imagePreviewUrl = url;
if(texture)
instance->sprite.setTexture(*texture, true);
else
instance->sprite = sf::Sprite();
}
void ImagePreview::preview(Gif *gif, const std::string &url)
{
ImagePreview *instance = getInstance();
if(gif == instance->gif) return;
instance->gif = gif;
instance->contentType = gif ? ContentType::GIF : ContentType::NONE;
imagePreviewUrl = url;
instance->sprite = sf::Sprite();
}
void* ImagePreview::getPreviewContentPtr()
{
return getInstance()->texture;
}
sf::Int32 ImagePreview::getTimeSinceLastSeenMs()
{
return getInstance()->lastSeenTimer.getElapsedTime().asMilliseconds();
}
void ImagePreview::processEvent(const sf::Event &event)
{
ImagePreview *instance = getInstance();
if(instance->contentType == ContentType::NONE) return;
if(event.mouseButton.button == sf::Mouse::Button::Left)
{
const auto &imagePos = instance->position;
const auto &imageSize = instance->size;
bool mouseInside = false;
if(event.mouseButton.x >= imagePos.x && event.mouseButton.x <= imagePos.x + imageSize.x &&
event.mouseButton.y >= imagePos.y && event.mouseButton.y <= imagePos.y + imageSize.y)
{
mouseInside = true;
}
if(event.type == sf::Event::MouseButtonPressed && mouseInside && !imagePreviewUrl.empty())
{
// TODO: Implement for other platforms than linux
std::string cmd = "xdg-open '";
cmd += escapeCommand(imagePreviewUrl);
cmd += "'";
printf("Clicked on web page preview, opening web page by running command: %s\n", cmd.c_str());
system(cmd.c_str());
}
else if(event.type == sf::Event::MouseButtonReleased && !mouseInside)
{
ImagePreview::preview((sf::Texture*)nullptr);
}
}
else if(event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Escape)
{
ImagePreview::preview((sf::Texture*)nullptr);
}
}
void ImagePreview::draw(sf::RenderWindow &window)
{
ImagePreview *instance = getInstance();
if(instance->contentType == ContentType::NONE) return;
auto windowSize = window.getSize();
sf::RectangleShape background(sf::Vector2f(windowSize.x, windowSize.y));
background.setFillColor(sf::Color(0, 0, 0, 200));
auto imageSize = instance->calculateImageSize(windowSize);
instance->size = imageSize;
window.draw(background);
switch(instance->contentType)
{
case ContentType::TEXTURE:
{
auto textureSize = instance->sprite.getTexture()->getSize();
instance->position = sf::Vector2f(windowSize.x / 2 - imageSize.x / 2, windowSize.y / 2 - imageSize.y / 2);
instance->sprite.setPosition(instance->position);
instance->sprite.setScale((double)imageSize.x / (double)textureSize.x, (double)imageSize.y / (double)textureSize.y);
window.draw(instance->sprite);
break;
}
case ContentType::GIF:
{
auto *gif = static_cast<SfmlGif*>(instance->gif);
gif->update();
auto textureSize = gif->getSize();
instance->position = sf::Vector2f(windowSize.x / 2 - imageSize.x / 2, windowSize.y / 2 - imageSize.y / 2);
sf::Sprite sprite(gif->texture);
sprite.setPosition(instance->position);
sprite.setScale(sf::Vector2f((double)imageSize.x / (double)textureSize.x, (double)imageSize.y / (double)textureSize.y));
window.draw(sprite);
break;
}
}
instance->lastSeenTimer.restart();
}
sf::Vector2u ImagePreview::calculateImageSize(sf::Vector2u windowSize) const
{
assert(contentType != ContentType::NONE);
sf::Vector2u imageMaxSize(windowSize.x - PADDING_HORIZONTAL * Settings::getScaling() * 2.0f, windowSize.y - PADDING_VERTICAL * Settings::getScaling() * 2.0f);
sf::Vector2u textureSize;
switch(contentType)
{
case ContentType::TEXTURE:
textureSize = texture->getSize();
break;
case ContentType::GIF:
auto size = gif->getSize();
textureSize.x = size.x;
textureSize.y = size.y;
break;
}
auto imageSize = textureSize;
double textureWidthHeightRatio = (double)imageSize.x / (double)imageSize.y;
double textureHeightWidthRatio = (double)imageSize.y / (double)imageSize.x;
int overflowVertical = (int)imageSize.y - (int)imageMaxSize.y;
if(overflowVertical > 0)
{
imageSize.y = imageMaxSize.y;
imageSize.x -= (overflowVertical * textureWidthHeightRatio);
}
int overflowHorizontal = (int)imageSize.x - (int)imageMaxSize.x;
if(overflowHorizontal > 0)
{
imageSize.x = imageMaxSize.x;
imageSize.y -= (overflowHorizontal * textureHeightWidthRatio);
}
return imageSize;
}
}
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