Merge pull request #31 from flowln/who_needs_webview

17 files changed, 298 insertions, 6 deletions

diff --git a/launcher/Application.cpp b/launcher/Application.cpp
index d07ad99e..6ffec1ae 100644
--- a/launcher/Application.cpp
+++ b/launcher/Application.cpp
@@ -816,6 +816,7 @@ Application::Application(int &argc, char **argv) : QApplication(argc, argv)
         m_metacache->addBase("FlamePacks", QDir("cache/FlamePacks").absolutePath());
         m_metacache->addBase("FlameMods", QDir("cache/FlameMods").absolutePath());
         m_metacache->addBase("ModrinthPacks", QDir("cache/ModrinthPacks").absolutePath());
+        m_metacache->addBase("ModrinthModpacks", QDir("cache/ModrinthModpacks").absolutePath());
         m_metacache->addBase("root", QDir::currentPath());
         m_metacache->addBase("translations", QDir("translations").absolutePath());
         m_metacache->addBase("icons", QDir("cache/icons").absolutePath());
diff --git a/launcher/CMakeLists.txt b/launcher/CMakeLists.txt
index 6ad91a85..79ac49c7 100644
--- a/launcher/CMakeLists.txt
+++ b/launcher/CMakeLists.txt
@@ -854,6 +854,10 @@ SET(LAUNCHER_SOURCES
     ui/widgets/PageContainer.cpp
     ui/widgets/PageContainer.h
     ui/widgets/PageContainer_p.h
+    ui/widgets/ProjectDescriptionPage.h
+    ui/widgets/ProjectDescriptionPage.cpp
+    ui/widgets/VariableSizedImageObject.h
+    ui/widgets/VariableSizedImageObject.cpp
     ui/widgets/ProjectItem.h
     ui/widgets/ProjectItem.cpp
     ui/widgets/VersionListView.cpp
diff --git a/launcher/ui/dialogs/NewsDialog.cpp b/launcher/ui/dialogs/NewsDialog.cpp
index d3b21627..e1b5dd74 100644
--- a/launcher/ui/dialogs/NewsDialog.cpp
+++ b/launcher/ui/dialogs/NewsDialog.cpp
@@ -20,7 +20,9 @@ NewsDialog::NewsDialog(QList<NewsEntryPtr> entries, QWidget* parent) : QDialog(p
 
     auto article_entry = m_entries.constFind(first_item->text()).value();
     ui->articleTitleLabel->setText(QString("<a href='%1'>%2</a>").arg(article_entry->link, first_item->text()));
+
     ui->currentArticleContentBrowser->setText(article_entry->content);
+    ui->currentArticleContentBrowser->flush();
 }
 
 NewsDialog::~NewsDialog()
@@ -33,7 +35,9 @@ void NewsDialog::selectedArticleChanged(const QString& new_title)
     auto const& article_entry = m_entries.constFind(new_title).value();
 
     ui->articleTitleLabel->setText(QString("<a href='%1'>%2</a>").arg(article_entry->link, new_title));
+
     ui->currentArticleContentBrowser->setText(article_entry->content);
+    ui->currentArticleContentBrowser->flush();
 }
 
 void NewsDialog::toggleArticleList()
diff --git a/launcher/ui/dialogs/NewsDialog.ui b/launcher/ui/dialogs/NewsDialog.ui
index 2aaa08f1..08f35a0b 100644
--- a/launcher/ui/dialogs/NewsDialog.ui
+++ b/launcher/ui/dialogs/NewsDialog.ui
@@ -49,7 +49,7 @@
         </widget>
        </item>
        <item>
-        <widget class="QTextBrowser" name="currentArticleContentBrowser">
+        <widget class="ProjectDescriptionPage" name="currentArticleContentBrowser">
          <property name="textInteractionFlags">
           <set>Qt::LinksAccessibleByKeyboard|Qt::LinksAccessibleByMouse|Qt::TextBrowserInteraction|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
          </property>
@@ -91,6 +91,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ProjectDescriptionPage</class>
+   <extends>QTextBrowser</extends>
+   <header>ui/widgets/ProjectDescriptionPage.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections>
   <connection>
diff --git a/launcher/ui/pages/modplatform/ModPage.cpp b/launcher/ui/pages/modplatform/ModPage.cpp
index 2af9a10a..f2c1746f 100644
--- a/launcher/ui/pages/modplatform/ModPage.cpp
+++ b/launcher/ui/pages/modplatform/ModPage.cpp
@@ -352,4 +352,5 @@ void ModPage::updateUi()
 
     HoeDown h;
     ui->packDescription->setHtml(text + (current.extraData.body.isEmpty() ? current.description : h.process(current.extraData.body.toUtf8())));
+    ui->packDescription->flush();
 }
diff --git a/launcher/ui/pages/modplatform/ModPage.ui b/launcher/ui/pages/modplatform/ModPage.ui
index afcd9bb7..943f02aa 100644
--- a/launcher/ui/pages/modplatform/ModPage.ui
+++ b/launcher/ui/pages/modplatform/ModPage.ui
@@ -14,7 +14,7 @@
    <item row="1" column="0" colspan="4">
     <layout class="QGridLayout" name="gridLayout_3">
      <item row="1" column="2">
-      <widget class="QTextBrowser" name="packDescription">
+      <widget class="ProjectDescriptionPage" name="packDescription">
        <property name="openExternalLinks">
         <bool>true</bool>
        </property>
@@ -98,6 +98,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ProjectDescriptionPage</class>
+   <extends>QTextBrowser</extends>
+   <header>ui/widgets/ProjectDescriptionPage.h</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>searchEdit</tabstop>
   <tabstop>searchButton</tabstop>
diff --git a/launcher/ui/pages/modplatform/flame/FlameModPage.cpp b/launcher/ui/pages/modplatform/flame/FlameModPage.cpp
index 54a7be04..fd6e32ff 100644
--- a/launcher/ui/pages/modplatform/flame/FlameModPage.cpp
+++ b/launcher/ui/pages/modplatform/flame/FlameModPage.cpp
@@ -59,6 +59,8 @@ FlameModPage::FlameModPage(ModDownloadDialog* dialog, BaseInstance* instance)
     connect(ui->packView->selectionModel(), &QItemSelectionModel::currentChanged, this, &FlameModPage::onSelectionChanged);
     connect(ui->versionSelectionBox, &QComboBox::currentTextChanged, this, &FlameModPage::onVersionSelectionChanged);
     connect(ui->modSelectionButton, &QPushButton::clicked, this, &FlameModPage::onModSelected);
+
+    ui->packDescription->setMetaEntry(metaEntryBase());
 }
 
 auto FlameModPage::validateVersion(ModPlatform::IndexedVersion& ver, QString mineVer, ModAPI::ModLoaderTypes loaders) const -> bool
diff --git a/launcher/ui/pages/modplatform/ftb/FtbPage.cpp b/launcher/ui/pages/modplatform/ftb/FtbPage.cpp
index 34a3d1c0..b08f3bc4 100644
--- a/launcher/ui/pages/modplatform/ftb/FtbPage.cpp
+++ b/launcher/ui/pages/modplatform/ftb/FtbPage.cpp
@@ -73,6 +73,8 @@ FtbPage::FtbPage(NewInstanceDialog* dialog, QWidget *parent)
     connect(ui->sortByBox, &QComboBox::currentTextChanged, this, &FtbPage::onSortingSelectionChanged);
     connect(ui->packView->selectionModel(), &QItemSelectionModel::currentChanged, this, &FtbPage::onSelectionChanged);
     connect(ui->versionSelectionBox, &QComboBox::currentTextChanged, this, &FtbPage::onVersionSelectionChanged);
+
+    ui->packDescription->setMetaEntry("FTBPacks");
 }
 
 FtbPage::~FtbPage()
diff --git a/launcher/ui/pages/modplatform/ftb/FtbPage.ui b/launcher/ui/pages/modplatform/ftb/FtbPage.ui
index 850bf091..8de0f4e6 100644
--- a/launcher/ui/pages/modplatform/ftb/FtbPage.ui
+++ b/launcher/ui/pages/modplatform/ftb/FtbPage.ui
@@ -57,7 +57,7 @@
       </widget>
      </item>
      <item row="0" column="1">
-      <widget class="QTextBrowser" name="packDescription">
+      <widget class="ProjectDescriptionPage" name="packDescription">
        <property name="openExternalLinks">
         <bool>true</bool>
        </property>
@@ -70,6 +70,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ProjectDescriptionPage</class>
+   <extends>QTextBrowser</extends>
+   <header>ui/widgets/ProjectDescriptionPage.h</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>searchEdit</tabstop>
   <tabstop>versionSelectionBox</tabstop>
diff --git a/launcher/ui/pages/modplatform/modrinth/ModrinthModPage.cpp b/launcher/ui/pages/modplatform/modrinth/ModrinthModPage.cpp
index 5fa00b9b..62e417c8 100644
--- a/launcher/ui/pages/modplatform/modrinth/ModrinthModPage.cpp
+++ b/launcher/ui/pages/modplatform/modrinth/ModrinthModPage.cpp
@@ -59,6 +59,8 @@ ModrinthModPage::ModrinthModPage(ModDownloadDialog* dialog, BaseInstance* instan
     connect(ui->packView->selectionModel(), &QItemSelectionModel::currentChanged, this, &ModrinthModPage::onSelectionChanged);
     connect(ui->versionSelectionBox, &QComboBox::currentTextChanged, this, &ModrinthModPage::onVersionSelectionChanged);
     connect(ui->modSelectionButton, &QPushButton::clicked, this, &ModrinthModPage::onModSelected);
+
+    ui->packDescription->setMetaEntry(metaEntryBase());
 }
 
 auto ModrinthModPage::validateVersion(ModPlatform::IndexedVersion& ver, QString mineVer, ModAPI::ModLoaderTypes loaders) const -> bool
diff --git a/launcher/ui/pages/modplatform/modrinth/ModrinthModel.cpp b/launcher/ui/pages/modplatform/modrinth/ModrinthModel.cpp
index 43fda9de..e6704eef 100644
--- a/launcher/ui/pages/modplatform/modrinth/ModrinthModel.cpp
+++ b/launcher/ui/pages/modplatform/modrinth/ModrinthModel.cpp
@@ -218,7 +218,7 @@ void ModpackListModel::getLogo(const QString& logo, const QString& logoUrl, Logo
 {
     if (m_logoMap.contains(logo)) {
         callback(APPLICATION->metacache()
-                     ->resolveEntry("ModrinthPacks", QString("logos/%1").arg(logo.section(".", 0, 0)))
+                     ->resolveEntry(m_parent->metaEntryBase(), QString("logos/%1").arg(logo.section(".", 0, 0)))
                      ->getFullPath());
     } else {
         requestLogo(logo, logoUrl);
@@ -232,7 +232,7 @@ void ModpackListModel::requestLogo(QString logo, QString url)
     }
 
     MetaEntryPtr entry =
-        APPLICATION->metacache()->resolveEntry("ModrinthPacks", QString("logos/%1").arg(logo.section(".", 0, 0)));
+        APPLICATION->metacache()->resolveEntry(m_parent->metaEntryBase(), QString("logos/%1").arg(logo.section(".", 0, 0)));
     auto job = new NetJob(QString("%1 Icon Download %2").arg(m_parent->debugName()).arg(logo), APPLICATION->network());
     job->addNetAction(Net::Download::makeCached(QUrl(url), entry));
 
diff --git a/launcher/ui/pages/modplatform/modrinth/ModrinthPage.cpp b/launcher/ui/pages/modplatform/modrinth/ModrinthPage.cpp
index cea6cdee..4482774c 100644
--- a/launcher/ui/pages/modplatform/modrinth/ModrinthPage.cpp
+++ b/launcher/ui/pages/modplatform/modrinth/ModrinthPage.cpp
@@ -74,6 +74,7 @@ ModrinthPage::ModrinthPage(NewInstanceDialog* dialog, QWidget* parent) : QWidget
     connect(ui->versionSelectionBox, &QComboBox::currentTextChanged, this, &ModrinthPage::onVersionSelectionChanged);
 
     ui->packView->setItemDelegate(new ProjectItemDelegate(this));
+    ui->packDescription->setMetaEntry(metaEntryBase());
 }
 
 ModrinthPage::~ModrinthPage()
@@ -283,6 +284,7 @@ void ModrinthPage::updateUI()
     text += h.process(current.extra.body.toUtf8());
 
     ui->packDescription->setHtml(text + current.description);
+    ui->packDescription->flush();
 }
 
 void ModrinthPage::suggestCurrent()
diff --git a/launcher/ui/pages/modplatform/modrinth/ModrinthPage.ui b/launcher/ui/pages/modplatform/modrinth/ModrinthPage.ui
index 6a34701d..6d8b2b67 100644
--- a/launcher/ui/pages/modplatform/modrinth/ModrinthPage.ui
+++ b/launcher/ui/pages/modplatform/modrinth/ModrinthPage.ui
@@ -66,7 +66,7 @@
       </widget>
      </item>
      <item>
-      <widget class="QTextBrowser" name="packDescription">
+      <widget class="ProjectDescriptionPage" name="packDescription">
        <property name="openExternalLinks">
         <bool>true</bool>
        </property>
@@ -99,6 +99,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ProjectDescriptionPage</class>
+   <extends>QTextBrowser</extends>
+   <header>ui/widgets/ProjectDescriptionPage.h</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>searchEdit</tabstop>
   <tabstop>searchButton</tabstop>
diff --git a/launcher/ui/widgets/ProjectDescriptionPage.cpp b/launcher/ui/widgets/ProjectDescriptionPage.cpp
new file mode 100644
index 00000000..c7e79a17
--- /dev/null
+++ b/launcher/ui/widgets/ProjectDescriptionPage.cpp
@@ -0,0 +1,23 @@
+#include "ProjectDescriptionPage.h"
+
+#include "VariableSizedImageObject.h"
+
+#include <QDebug>
+
+ProjectDescriptionPage::ProjectDescriptionPage(QWidget* parent) : QTextBrowser(parent), m_image_text_object(new VariableSizedImageObject)
+{
+    m_image_text_object->setParent(this);
+    document()->documentLayout()->registerHandler(QTextFormat::ImageObject, m_image_text_object.get());
+}
+
+void ProjectDescriptionPage::setMetaEntry(QString entry)
+{
+    if (m_image_text_object)
+        m_image_text_object->setMetaEntry(entry);
+}
+
+void ProjectDescriptionPage::flush()
+{
+    if (m_image_text_object)
+        m_image_text_object->flush();
+}
diff --git a/launcher/ui/widgets/ProjectDescriptionPage.h b/launcher/ui/widgets/ProjectDescriptionPage.h
new file mode 100644
index 00000000..3dd85302
--- /dev/null
+++ b/launcher/ui/widgets/ProjectDescriptionPage.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <QTextBrowser>
+
+#include "QObjectPtr.h"
+
+QT_BEGIN_NAMESPACE
+class VariableSizedImageObject;
+QT_END_NAMESPACE
+
+/** This subclasses QTextBrowser to provide additional capabilities
+ *  to it, like allowing for images to be shown.
+ */
+class ProjectDescriptionPage final : public QTextBrowser {
+    Q_OBJECT
+
+   public:
+    ProjectDescriptionPage(QWidget* parent = nullptr);
+
+    void setMetaEntry(QString entry);
+
+   public slots:
+    /** Flushes the current processing happening in the page.
+     *
+     *  Should be called when changing the page's content entirely, to
+     *  prevent old tasks from changing the new content.
+     */
+    void flush();
+
+   private:
+    shared_qobject_ptr<VariableSizedImageObject> m_image_text_object;
+};
diff --git a/launcher/ui/widgets/VariableSizedImageObject.cpp b/launcher/ui/widgets/VariableSizedImageObject.cpp
new file mode 100644
index 00000000..e57f7e95
--- /dev/null
+++ b/launcher/ui/widgets/VariableSizedImageObject.cpp
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "VariableSizedImageObject.h"
+
+#include <QAbstractTextDocumentLayout>
+#include <QDebug>
+#include <QPainter>
+#include <QTextObject>
+
+#include "Application.h"
+
+#include "net/NetJob.h"
+
+enum FormatProperties { ImageData = QTextFormat::UserProperty + 1 };
+
+QSizeF VariableSizedImageObject::intrinsicSize(QTextDocument* doc, int posInDocument, const QTextFormat& format)
+{
+    Q_UNUSED(posInDocument);
+
+    auto image = qvariant_cast<QImage>(format.property(ImageData));
+    auto size = image.size();
+
+    // Get the width of the text content to make the image similar sized.
+    // doc->textWidth() includes the margin, so we need to remove it.
+    auto doc_width = doc->textWidth() - 2 * doc->documentMargin();
+
+    if (size.width() > doc_width)
+        size *= doc_width / (double)size.width();
+
+    return { size };
+}
+void VariableSizedImageObject::drawObject(QPainter* painter,
+                                          const QRectF& rect,
+                                          QTextDocument* doc,
+                                          int posInDocument,
+                                          const QTextFormat& format)
+{
+    if (!format.hasProperty(ImageData)) {
+        QUrl image_url{ qvariant_cast<QString>(format.property(QTextFormat::ImageName)) };
+        if (m_fetching_images.contains(image_url))
+            return;
+
+        loadImage(doc, image_url, posInDocument);
+        return;
+    }
+
+    auto image = qvariant_cast<QImage>(format.property(ImageData));
+
+    painter->setRenderHint(QPainter::RenderHint::SmoothPixmapTransform);
+    painter->drawImage(rect, image);
+}
+
+void VariableSizedImageObject::flush()
+{
+    m_fetching_images.clear();
+}
+
+void VariableSizedImageObject::parseImage(QTextDocument* doc, QImage image, int posInDocument)
+{
+    QTextCursor cursor(doc);
+    cursor.setPosition(posInDocument);
+    cursor.setKeepPositionOnInsert(true);
+
+    auto image_char_format = cursor.charFormat();
+
+    image_char_format.setObjectType(QTextFormat::ImageObject);
+    image_char_format.setProperty(ImageData, image);
+
+    // Qt doesn't allow us to modify the properties of an existing object in the document.
+    // So we remove the old one and add the new one with the ImageData property set.
+    cursor.deleteChar();
+    cursor.insertText(QString(QChar::ObjectReplacementCharacter), image_char_format);
+}
+
+void VariableSizedImageObject::loadImage(QTextDocument* doc, const QUrl& source, int posInDocument)
+{
+    m_fetching_images.insert(source);
+
+    MetaEntryPtr entry = APPLICATION->metacache()->resolveEntry(
+        m_meta_entry,
+        QString("images/%1").arg(QString(QCryptographicHash::hash(source.toEncoded(), QCryptographicHash::Algorithm::Sha1).toHex())));
+
+    auto job = new NetJob(QString("Load Image: %1").arg(source.fileName()), APPLICATION->network());
+    job->addNetAction(Net::Download::makeCached(source, entry));
+
+    auto full_entry_path = entry->getFullPath();
+    auto source_url = source;
+    connect(job, &NetJob::succeeded, [this, doc, full_entry_path, source_url, posInDocument] {
+        qDebug() << "Loaded resource at" << full_entry_path;
+
+        // If we flushed, don't proceed.
+        if (!m_fetching_images.contains(source_url))
+            return;
+
+        QImage image(full_entry_path);
+        doc->addResource(QTextDocument::ImageResource, source_url, image);
+
+        parseImage(doc, image, posInDocument);
+
+        // This size hack is needed to prevent the content from being laid out in an area smaller
+        // than the total width available (weird).
+        auto size = doc->pageSize();
+        doc->adjustSize();
+        doc->setPageSize(size);
+
+        m_fetching_images.remove(source_url);
+    });
+    connect(job, &NetJob::finished, job, &NetJob::deleteLater);
+
+    job->start();
+}
diff --git a/launcher/ui/widgets/VariableSizedImageObject.h b/launcher/ui/widgets/VariableSizedImageObject.h
new file mode 100644
index 00000000..137487ee
--- /dev/null
+++ b/launcher/ui/widgets/VariableSizedImageObject.h
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-3.0-only
+/*
+ *  PolyMC - Minecraft Launcher
+ *  Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, version 3.
+ *
+ *  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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QObject>
+#include <QString>
+#include <QTextObjectInterface>
+#include <QUrl>
+
+/** Custom image text object to be used instead of the normal one in ProjectDescriptionPage.
+ *
+ *  Why? Because we want to re-scale images dynamically based on the document's size, in order to
+ *  not have images being weirdly cropped out in different resolutions.
+ */
+class VariableSizedImageObject final : public QObject, public QTextObjectInterface {
+    Q_OBJECT
+    Q_INTERFACES(QTextObjectInterface)
+
+   public:
+    QSizeF intrinsicSize(QTextDocument* doc, int posInDocument, const QTextFormat& format) override;
+    void drawObject(QPainter* painter, const QRectF& rect, QTextDocument* doc, int posInDocument, const QTextFormat& format) override;
+
+    void setMetaEntry(QString meta_entry) { m_meta_entry = meta_entry; }
+
+   public slots:
+    /** Stops all currently loading images from modifying the document.
+     *
+     *  This does not stop the ongoing network tasks, it only prevents their result
+     *  from impacting the document any further.
+     */
+    void flush();
+
+   private:
+    /** Adds the image to the document, in the given position.
+     */
+    void parseImage(QTextDocument* doc, QImage image, int posInDocument);
+
+    /** Loads an image from an external source, and adds it to the document.
+     *
+     *  This uses m_meta_entry to cache the image.
+     */
+    void loadImage(QTextDocument* doc, const QUrl& source, int posInDocument);
+
+   private:
+    QString m_meta_entry;
+
+    QSet<QUrl> m_fetching_images;
+};