From ff83cfac10939ceba524c93d4e36f634f4bec805 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 19 May 2017 19:09:17 +0200
Subject: Make sure we don't resize to negative values.

---
 plugingui/abouttab.cc                  |  6 ++++--
 plugingui/abouttab.h                   |  2 +-
 plugingui/diskstreamingframecontent.cc |  4 ++--
 plugingui/diskstreamingframecontent.h  |  4 ++--
 plugingui/drumkitframecontent.cc       |  4 ++--
 plugingui/drumkitframecontent.h        |  6 +++---
 plugingui/filebrowser.cc               |  9 +++++----
 plugingui/frame.cc                     |  4 ++--
 plugingui/frame.h                      | 12 ++++++------
 plugingui/layout.cc                    |  5 +++--
 plugingui/lineedit.cc                  |  2 +-
 plugingui/mainwindow.cc                |  2 +-
 plugingui/tabwidget.cc                 | 18 +++++++++---------
 plugingui/textedit.cc                  |  2 +-
 plugingui/textedit.h                   |  6 +++---
 plugingui/widget.cc                    |  1 +
 16 files changed, 46 insertions(+), 41 deletions(-)

diff --git a/plugingui/abouttab.cc b/plugingui/abouttab.cc
index 2e4eace..f731100 100644
--- a/plugingui/abouttab.cc
+++ b/plugingui/abouttab.cc
@@ -38,14 +38,16 @@ AboutTab::AboutTab(Widget* parent)
 {
 	text_edit.setText(getAboutText());
 	text_edit.setReadOnly(true);
-	text_edit.resize(width() - 2*margin, height() - 2*margin);
+	text_edit.resize(std::max((int)width() - 2*margin,0),
+	                 std::max((int)height() - 2*margin, 0));
 	text_edit.move(margin, margin);
 }
 
 void AboutTab::resize(std::size_t width, std::size_t height)
 {
 	Widget::resize(width, height);
-	text_edit.resize(width - 2*margin, height - 2*margin);
+	text_edit.resize(std::max((int)width - 2*margin, 0),
+	                 std::max((int)height - 2*margin, 0));
 }
 
 std::string AboutTab::getAboutText()
diff --git a/plugingui/abouttab.h b/plugingui/abouttab.h
index 556b5bb..ecec13a 100644
--- a/plugingui/abouttab.h
+++ b/plugingui/abouttab.h
@@ -48,7 +48,7 @@ private:
 	std::string getAboutText();
 
 	TextEdit text_edit{this};
-	std::size_t margin{10};
+	int margin{10};
 
 	Resource about{":../ABOUT"};
 	Resource authors{":../AUTHORS"};
diff --git a/plugingui/diskstreamingframecontent.cc b/plugingui/diskstreamingframecontent.cc
index 33367de..4bd9cad 100644
--- a/plugingui/diskstreamingframecontent.cc
+++ b/plugingui/diskstreamingframecontent.cc
@@ -73,10 +73,10 @@ void DiskstreamingframeContent::resize(std::size_t width, std::size_t height)
 {
 	Widget::resize(width, height);
 
-	std::size_t slider_button_gap = 10;
+	int slider_button_gap = 10;
 
 	slider_width = 0.8 * width;
-	button_width = width - slider_width - slider_button_gap;
+	button_width = std::max((int)width - slider_width - slider_button_gap, 0);
 
 	label_text.move(0, 0);
 	slider.move(0, 20);
diff --git a/plugingui/diskstreamingframecontent.h b/plugingui/diskstreamingframecontent.h
index 0f9a098..e404807 100644
--- a/plugingui/diskstreamingframecontent.h
+++ b/plugingui/diskstreamingframecontent.h
@@ -63,8 +63,8 @@ private:
 	Slider slider{this};
 	Button button{this};
 
-	std::size_t slider_width;
-	std::size_t button_width;
+	int slider_width;
+	int button_width;
 
 	Settings& settings;
 	SettingsNotifier& settings_notifier;
diff --git a/plugingui/drumkitframecontent.cc b/plugingui/drumkitframecontent.cc
index f90f346..d58f7b4 100644
--- a/plugingui/drumkitframecontent.cc
+++ b/plugingui/drumkitframecontent.cc
@@ -51,8 +51,8 @@ void BrowseFile::resize(std::size_t width, std::size_t height)
 {
 	Widget::resize(width, height);
 
-	lineedit_width = 0.77 * width - gap;
-	button_width = width - lineedit_width - gap;
+	lineedit_width = std::max((int)(0.77 * (int)width - gap), 0);
+	button_width = std::max((int)width - lineedit_width - gap, 0);
 
 	lineedit.resize(lineedit_width, 29);
 	browse_button.resize(button_width, 30);
diff --git a/plugingui/drumkitframecontent.h b/plugingui/drumkitframecontent.h
index c6e0942..866b720 100644
--- a/plugingui/drumkitframecontent.h
+++ b/plugingui/drumkitframecontent.h
@@ -61,9 +61,9 @@ private:
 	LineEdit lineedit{this};
 	Button browse_button{this};
 
-	std::size_t lineedit_width;
-	std::size_t button_width;
-	std::size_t gap{10};
+	int lineedit_width;
+	int button_width;
+	int gap{10};
 };
 
 class DrumkitframeContent
diff --git a/plugingui/filebrowser.cc b/plugingui/filebrowser.cc
index 8854f6e..75d717d 100644
--- a/plugingui/filebrowser.cc
+++ b/plugingui/filebrowser.cc
@@ -118,18 +118,19 @@ void FileBrowser::resize(std::size_t width, std::size_t height)
 	offset += btn_h;
 
 	lbl_path.resize(60, btn_h);
-	lineedit.resize(width - 60 - brd, btn_h);
+	lineedit.resize(std::max((int)width - 60 - brd, 0), btn_h);
 
 	offset += brd;
 
 	listbox.move(brd, offset);
-	listbox.resize(width - 1 - 2*brd, height - btn_h - 2*brd - offset);
+	listbox.resize(std::max((int)width - 1 - 2*brd, 0),
+	               std::max((int)height - btn_h - 2*brd - offset, 0));
 
 	btn_esc.move(brd, height - btn_h - brd);
-	btn_esc.resize((width - 1 - 2*brd) / 2 - brd / 2, btn_h);
+	btn_esc.resize(std::max(((int)width - 1 - 2*brd) / 2 - brd / 2, 0), btn_h);
 
 	btn_sel.move(brd + width / 2 - brd / 2, height - btn_h - brd);
-	btn_sel.resize((width - 1 - 2*brd) / 2, btn_h);
+	btn_sel.resize(std::max((int)((int)width - 1 - 2*brd) / 2, 0), btn_h);
 }
 
 void FileBrowser::repaintEvent(RepaintEvent* repaintEvent)
diff --git a/plugingui/frame.cc b/plugingui/frame.cc
index efe0281..81cc3c2 100644
--- a/plugingui/frame.cc
+++ b/plugingui/frame.cc
@@ -110,8 +110,8 @@ void FrameWidget::sizeChanged(int width, int height)
 	{
 		content_start_x = content_margin;
 		content_start_y = bar_height + content_margin;
-		content_width = width - 2 * content_margin;
-		content_height = height - (bar_height + 2 * content_margin);
+		content_width = std::max((int)width - 2 * content_margin, 0);
+		content_height = std::max((int)height - (bar_height + 2 * content_margin), 0);
 
 		content->move(content_start_x, content_start_y);
 		content->resize(content_width, content_height);
diff --git a/plugingui/frame.h b/plugingui/frame.h
index 8475690..eb745f6 100644
--- a/plugingui/frame.h
+++ b/plugingui/frame.h
@@ -80,7 +80,7 @@ private:
 	void powerButtonStateChanged(bool clicked);
 
 	// grey box
-	std::size_t bar_height;
+	int bar_height;
 	GUI::Colour grey_box_colour{0.7};
 	GUI::Colour background_colour{0.85, 0.8};
 
@@ -95,12 +95,12 @@ private:
 
 	// content box
 	Widget* content{nullptr};
-	std::size_t content_margin{12};
+	int content_margin{12};
 
-	std::size_t content_start_x;
-	std::size_t content_start_y;
-	std::size_t content_width;
-	std::size_t content_height;
+	int content_start_x;
+	int content_start_y;
+	int content_width;
+	int content_height;
 };
 
 } // GUI::
diff --git a/plugingui/layout.cc b/plugingui/layout.cc
index ea025bd..1e18c40 100644
--- a/plugingui/layout.cc
+++ b/plugingui/layout.cc
@@ -106,7 +106,8 @@ void BoxLayout::setSpacing(size_t spacing)
 //
 
 VBoxLayout::VBoxLayout(LayoutItem* parent)
-    : BoxLayout(parent), align(HAlignment::center)
+	: BoxLayout(parent)
+	, align(HAlignment::center)
 {
 }
 
@@ -315,7 +316,7 @@ auto GridLayout::calculateCellSize() const -> CellSize
 }
 
 void GridLayout::moveAndResize(
-    LayoutItem& item, GridRange const& range, CellSize cell_size) const
+	LayoutItem& item, GridRange const& range, CellSize cell_size) const
 {
 	std::size_t x = range.column_begin * (cell_size.width + spacing);
 	std::size_t y = range.row_begin * (cell_size.height + spacing);
diff --git a/plugingui/lineedit.cc b/plugingui/lineedit.cc
index 96bf56f..5dd8bc5 100644
--- a/plugingui/lineedit.cc
+++ b/plugingui/lineedit.cc
@@ -237,7 +237,7 @@ void LineEdit::repaintEvent(RepaintEvent *repaintEvent)
 	while(true)
 	{
 		int textWidth = font.textWidth(visibleText);
-		if(textWidth <= (w - BORDER - 4 + 3))
+		if(textWidth <= std::max(w - BORDER - 4 + 3, 0))
 		{
 			break;
 		}
diff --git a/plugingui/mainwindow.cc b/plugingui/mainwindow.cc
index 578af28..d98d335 100644
--- a/plugingui/mainwindow.cc
+++ b/plugingui/mainwindow.cc
@@ -99,7 +99,7 @@ void MainWindow::repaintEvent(RepaintEvent* repaintEvent)
 
 void MainWindow::sizeChanged(std::size_t width, std::size_t height)
 {
-	tabs.resize(width - 2 * 16, height);
+	tabs.resize(std::max((int)width - 2 * 16, 0), height);
 }
 
 void MainWindow::closeEventHandler()
diff --git a/plugingui/tabwidget.cc b/plugingui/tabwidget.cc
index dde2137..b18f62f 100644
--- a/plugingui/tabwidget.cc
+++ b/plugingui/tabwidget.cc
@@ -94,13 +94,13 @@ void TabWidget::sizeChanged(int width, int height)
 {
 	std::size_t pos = 0;
 
-	std::size_t button_width = 1;
-	std::size_t bar_height = 25;
-	std::size_t button_border_width = 10;
+	int button_width = 1;
+	int bar_height = 25;
+	int button_border_width = 10;
 
-	std::size_t button_padding_left = 25;
-	std::size_t button_padding_inner = 3;
-	std::size_t logo_padding_right = button_padding_left / 2;
+	int button_padding_left = 25;
+	int button_padding_inner = 3;
+	int logo_padding_right = button_padding_left / 2;
 
 	Painter p(*this);
 
@@ -108,11 +108,11 @@ void TabWidget::sizeChanged(int width, int height)
 	{
 		for (auto& button : buttons)
 		{
-			auto min_width = button.getMinimalWidth();
+			int min_width = button.getMinimalWidth();
 			button_width = std::max(button_width, min_width + button_border_width);
 		}
 
-		button_width = std::min(button_width, width / buttons.size());
+		button_width = std::min(button_width, width / (int)buttons.size());
 	}
 
 	// draw the upper bar
@@ -132,7 +132,7 @@ void TabWidget::sizeChanged(int width, int height)
 	}
 
 	stack.move(0, bar_height);
-	stack.resize(width, height - bar_height);
+	stack.resize(width, std::max((int)height - bar_height, 0));
 }
 
 } // GUI::
diff --git a/plugingui/textedit.cc b/plugingui/textedit.cc
index ebe8d32..fd2f891 100644
--- a/plugingui/textedit.cc
+++ b/plugingui/textedit.cc
@@ -50,7 +50,7 @@ void TextEdit::resize(std::size_t width, std::size_t height)
 
 	needs_preprocessing = true;
 	scroll.move(width - 2*x_border - 3, y_border - 1);
-	scroll.resize(scroll.width(), height - 2*(y_border - 1));
+	scroll.resize(scroll.width(), std::max((int)height - 2*(y_border - 1), 0));
 }
 
 void TextEdit::setReadOnly(bool readonly)
diff --git a/plugingui/textedit.h b/plugingui/textedit.h
index 6ce59b6..17a04ff 100644
--- a/plugingui/textedit.h
+++ b/plugingui/textedit.h
@@ -74,9 +74,9 @@ private:
 	    0,         // atlas offset (x, y)
 	    7, 1, 7,   // dx1, dx2, dx3
 	    7, 63, 7}; // dy1, dy2, dy3
-	
-	static constexpr std::size_t x_border{10};
-	static constexpr std::size_t y_border{8};
+
+	static constexpr int x_border{10};
+	static constexpr int y_border{8};
 
 	ScrollBar scroll;
 	Font font;
diff --git a/plugingui/widget.cc b/plugingui/widget.cc
index 4a99524..c148219 100644
--- a/plugingui/widget.cc
+++ b/plugingui/widget.cc
@@ -122,6 +122,7 @@ void Widget::reparent(Widget* parent)
 
 void Widget::resize(std::size_t width, std::size_t height)
 {
+	assert(width < 32000 && height < 32000); // Catch negative values as size_t
 	if((width < 1) || (height < 1) ||
 	   ((width == _width) && (height == _height)))
 	{
-- 
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