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#include "markdown_helper.h"
#include "core/style.h"
#include "logger.h"
#include "imgui/imgui_image.h"
#include "resources.h"
#include "common/image/image.h"
#include "common/image/io.h"
#include <filesystem>
#if defined(_WIN32)
#include <windows.h>
#elif defined(__ANDROID__)
#include <android_native_app_glue.h>
extern struct android_app *g_App;
#endif
namespace widgets
{
void MarkdownHelper::link_callback(ImGui::MarkdownLinkCallbackData data_)
{
std::string url(data_.link, data_.linkLength);
if (!data_.isImage)
{
logger->info("Opening URL " + url);
#if defined(_WIN32)
ShellExecuteA(0, 0, url.c_str(), 0, 0, SW_SHOW);
#elif defined(__APPLE__)
system(std::string("open " + url).c_str());
#elif defined(__ANDROID__)
JavaVM *java_vm = g_App->activity->vm;
JNIEnv *java_env = NULL;
jint jni_return = java_vm->GetEnv((void **)&java_env, JNI_VERSION_1_6);
if (jni_return == JNI_ERR)
throw std::runtime_error("Could not get JNI environement");
jni_return = java_vm->AttachCurrentThread(&java_env, NULL);
if (jni_return != JNI_OK)
throw std::runtime_error("Could not attach to thread");
jclass native_activity_clazz = java_env->GetObjectClass(g_App->activity->clazz);
if (native_activity_clazz == NULL)
throw std::runtime_error("Could not get MainActivity class");
jmethodID method_id = java_env->GetMethodID(native_activity_clazz, "openURL", "(Ljava/lang/String;)V");
if (method_id == NULL)
throw std::runtime_error("Could not get methode ID");
jstring jurl = java_env->NewStringUTF(url.c_str());
java_env->CallVoidMethod(g_App->activity->clazz, method_id, jurl);
jni_return = java_vm->DetachCurrentThread();
if (jni_return != JNI_OK)
throw std::runtime_error("Could not detach from thread");
#else
if (system(std::string("xdg-open " + url).c_str()) != 0)
logger->error("Error opening URL!");
#endif
}
}
ImGui::MarkdownImageData MarkdownHelper::image_callback(ImGui::MarkdownLinkCallbackData data_)
{
MarkdownHelper *tthis = (MarkdownHelper *)data_.userData;
std::string image_path(data_.link, data_.linkLength);
ImGui::MarkdownImageData imageData;
if (tthis->texture_buffer.count(image_path))
{
imageData = tthis->texture_buffer[image_path];
}
else
{
imageData.isValid = false;
if (std::filesystem::exists(resources::getResourcePath(image_path)))
{
logger->trace("Loading image for markdown : " + image_path);
image::Image img;
image::load_img(img, resources::getResourcePath(image_path));
unsigned int text_id = makeImageTexture();
uint32_t *output_buffer = new uint32_t[img.width() * img.height()];
image::image_to_rgba(img, output_buffer);
updateImageTexture(text_id, output_buffer, img.width(), img.height());
delete[] output_buffer;
imageData.isValid = true;
imageData.useLinkCallback = false;
imageData.user_texture_id = (ImTextureID)(intptr_t)text_id;
imageData.size = ImVec2(img.width(), img.height());
}
tthis->texture_buffer.emplace(image_path, imageData);
}
// For image resize when available size.x > image width, add
ImVec2 const contentSize = ImGui::GetContentRegionAvail();
if (imageData.size.x > contentSize.x)
{
float const ratio = imageData.size.y / imageData.size.x;
imageData.size.x = contentSize.x;
imageData.size.y = contentSize.x * ratio;
}
return imageData;
}
MarkdownHelper::MarkdownHelper()
{
mdConfig.linkCallback = link_callback;
mdConfig.imageCallback = image_callback;
}
void MarkdownHelper::render()
{
mdConfig.headingFormats[0] = {style::bigFont, true};
mdConfig.headingFormats[1] = {style::bigFont, true};
mdConfig.headingFormats[2] = {style::baseFont, true};
mdConfig.userData = (void *)this;
ImGui::Markdown(markdown_.c_str(), markdown_.length(), mdConfig);
}
void MarkdownHelper::set_md(std::string md)
{
markdown_ = md;
texture_buffer.clear();
}
}
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