diff options
Diffstat (limited to 'widget/gtk/gtk3drawing.cpp')
| -rw-r--r-- | widget/gtk/gtk3drawing.cpp | 2179 |
1 files changed, 2179 insertions, 0 deletions
diff --git a/widget/gtk/gtk3drawing.cpp b/widget/gtk/gtk3drawing.cpp new file mode 100644 index 0000000000..1fa8b95606 --- /dev/null +++ b/widget/gtk/gtk3drawing.cpp @@ -0,0 +1,2179 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * This file contains painting functions for each of the gtk2 widgets. + * Adapted from the gtkdrawing.c, and gtk+2.0 source. + */ + +#include <gtk/gtk.h> +#include <gdk/gdkprivate.h> +#include <string.h> +#include "gtkdrawing.h" +#include "mozilla/Assertions.h" +#include "mozilla/ScopeExit.h" +#include "prinrval.h" +#include "WidgetStyleCache.h" +#include "nsString.h" +#include "nsDebug.h" +#include "WidgetUtilsGtk.h" + +#include <math.h> +#include <dlfcn.h> + +static gboolean checkbox_check_state; +static gboolean notebook_has_tab_gap; + +static ToggleGTKMetrics sCheckboxMetrics; +static ToggleGTKMetrics sRadioMetrics; +static ToolbarGTKMetrics sToolbarMetrics; +static CSDWindowDecorationSize sToplevelWindowDecorationSize; +static CSDWindowDecorationSize sPopupWindowDecorationSize; + +using mozilla::Span; + +#define ARROW_UP 0 +#define ARROW_DOWN G_PI +#define ARROW_RIGHT G_PI_2 +#define ARROW_LEFT (G_PI + G_PI_2) + +#if 0 +// It's used for debugging only to compare Gecko widget style with +// the ones used by Gtk+ applications. +static void +style_path_print(GtkStyleContext *context) +{ + const GtkWidgetPath* path = gtk_style_context_get_path(context); + + static auto sGtkWidgetPathToStringPtr = + (char * (*)(const GtkWidgetPath *)) + dlsym(RTLD_DEFAULT, "gtk_widget_path_to_string"); + + fprintf(stderr, "Style path:\n%s\n\n", sGtkWidgetPathToStringPtr(path)); +} +#endif + +static GtkBorder operator+=(GtkBorder& first, const GtkBorder& second) { + first.left += second.left; + first.right += second.right; + first.top += second.top; + first.bottom += second.bottom; + return first; +} + +static gint moz_gtk_get_tab_thickness(GtkStyleContext* style); + +static void Inset(GdkRectangle*, const GtkBorder&); + +static void InsetByMargin(GdkRectangle*, GtkStyleContext* style); + +static void moz_gtk_add_style_margin(GtkStyleContext* style, gint* left, + gint* top, gint* right, gint* bottom) { + GtkBorder margin; + + gtk_style_context_get_margin(style, gtk_style_context_get_state(style), + &margin); + *left += margin.left; + *right += margin.right; + *top += margin.top; + *bottom += margin.bottom; +} + +static void moz_gtk_add_style_border(GtkStyleContext* style, gint* left, + gint* top, gint* right, gint* bottom) { + GtkBorder border; + + gtk_style_context_get_border(style, gtk_style_context_get_state(style), + &border); + + *left += border.left; + *right += border.right; + *top += border.top; + *bottom += border.bottom; +} + +static void moz_gtk_add_style_padding(GtkStyleContext* style, gint* left, + gint* top, gint* right, gint* bottom) { + GtkBorder padding; + + gtk_style_context_get_padding(style, gtk_style_context_get_state(style), + &padding); + + *left += padding.left; + *right += padding.right; + *top += padding.top; + *bottom += padding.bottom; +} + +static void moz_gtk_add_margin_border_padding(GtkStyleContext* style, + gint* left, gint* top, + gint* right, gint* bottom) { + moz_gtk_add_style_margin(style, left, top, right, bottom); + moz_gtk_add_style_border(style, left, top, right, bottom); + moz_gtk_add_style_padding(style, left, top, right, bottom); +} + +static void moz_gtk_add_border_padding(GtkStyleContext* style, gint* left, + gint* top, gint* right, gint* bottom) { + moz_gtk_add_style_border(style, left, top, right, bottom); + moz_gtk_add_style_padding(style, left, top, right, bottom); +} + +// In case there's an error in Gtk theme and preferred size is zero, +// return some sane values to pass mozilla automation tests. +// It should not happen in real-life. +#define MIN_WIDGET_SIZE 10 +static void moz_gtk_sanity_preferred_size(GtkRequisition* requisition) { + if (requisition->width <= 0) { + requisition->width = MIN_WIDGET_SIZE; + } + if (requisition->height <= 0) { + requisition->height = MIN_WIDGET_SIZE; + } +} + +// GetStateFlagsFromGtkWidgetState() can be safely used for the specific +// GtkWidgets that set both prelight and active flags. For other widgets, +// either the GtkStateFlags or Gecko's GtkWidgetState need to be carefully +// adjusted to match GTK behavior. Although GTK sets insensitive and focus +// flags in the generic GtkWidget base class, GTK adds prelight and active +// flags only to widgets that are expected to demonstrate prelight or active +// states. This contrasts with HTML where any element may have :active and +// :hover states, and so Gecko's GtkStateFlags do not necessarily map to GTK +// flags. Failure to restrict the flags in the same way as GTK can cause +// generic CSS selectors from some themes to unintentionally match elements +// that are not expected to change appearance on hover or mouse-down. +static GtkStateFlags GetStateFlagsFromGtkWidgetState(GtkWidgetState* state) { + GtkStateFlags stateFlags = GTK_STATE_FLAG_NORMAL; + + if (state->disabled) + stateFlags = GTK_STATE_FLAG_INSENSITIVE; + else { + if (state->depressed || state->active) + stateFlags = + static_cast<GtkStateFlags>(stateFlags | GTK_STATE_FLAG_ACTIVE); + if (state->inHover) + stateFlags = + static_cast<GtkStateFlags>(stateFlags | GTK_STATE_FLAG_PRELIGHT); + if (state->focused) + stateFlags = + static_cast<GtkStateFlags>(stateFlags | GTK_STATE_FLAG_FOCUSED); + if (state->backdrop) + stateFlags = + static_cast<GtkStateFlags>(stateFlags | GTK_STATE_FLAG_BACKDROP); + } + + return stateFlags; +} + +static GtkStateFlags GetStateFlagsFromGtkTabFlags(GtkTabFlags flags) { + return ((flags & MOZ_GTK_TAB_SELECTED) == 0) ? GTK_STATE_FLAG_NORMAL + : GTK_STATE_FLAG_ACTIVE; +} + +gint moz_gtk_init() { + if (gtk_major_version > 3 || + (gtk_major_version == 3 && gtk_minor_version >= 14)) + checkbox_check_state = GTK_STATE_FLAG_CHECKED; + else + checkbox_check_state = GTK_STATE_FLAG_ACTIVE; + + moz_gtk_refresh(); + + return MOZ_GTK_SUCCESS; +} + +void moz_gtk_refresh() { + if (gtk_check_version(3, 20, 0) != nullptr) { + // Deprecated for Gtk >= 3.20+ + GtkStyleContext* style = GetStyleContext(MOZ_GTK_TAB_TOP); + gtk_style_context_get_style(style, "has-tab-gap", ¬ebook_has_tab_gap, + NULL); + } else { + notebook_has_tab_gap = true; + } + + sCheckboxMetrics.initialized = false; + sRadioMetrics.initialized = false; + sToolbarMetrics.initialized = false; + sToplevelWindowDecorationSize.initialized = false; + sPopupWindowDecorationSize.initialized = false; + + /* This will destroy all of our widgets */ + ResetWidgetCache(); +} + +gint moz_gtk_button_get_default_overflow(gint* border_top, gint* border_left, + gint* border_bottom, + gint* border_right) { + GtkBorder* default_outside_border; + + GtkStyleContext* style = GetStyleContext(MOZ_GTK_BUTTON); + gtk_style_context_get_style(style, "default-outside-border", + &default_outside_border, NULL); + + if (default_outside_border) { + *border_top = default_outside_border->top; + *border_left = default_outside_border->left; + *border_bottom = default_outside_border->bottom; + *border_right = default_outside_border->right; + gtk_border_free(default_outside_border); + } else { + *border_top = *border_left = *border_bottom = *border_right = 0; + } + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_button_get_default_border(gint* border_top, + gint* border_left, + gint* border_bottom, + gint* border_right) { + GtkBorder* default_border; + + GtkStyleContext* style = GetStyleContext(MOZ_GTK_BUTTON); + gtk_style_context_get_style(style, "default-border", &default_border, NULL); + + if (default_border) { + *border_top = default_border->top; + *border_left = default_border->left; + *border_bottom = default_border->bottom; + *border_right = default_border->right; + gtk_border_free(default_border); + } else { + /* see gtkbutton.c */ + *border_top = *border_left = *border_bottom = *border_right = 1; + } + return MOZ_GTK_SUCCESS; +} + +gint moz_gtk_splitter_get_metrics(gint orientation, gint* size) { + GtkStyleContext* style; + if (orientation == GTK_ORIENTATION_HORIZONTAL) { + style = GetStyleContext(MOZ_GTK_SPLITTER_HORIZONTAL); + } else { + style = GetStyleContext(MOZ_GTK_SPLITTER_VERTICAL); + } + gtk_style_context_get_style(style, "handle_size", size, NULL); + return MOZ_GTK_SUCCESS; +} + +static void CalculateToolbarButtonMetrics(WidgetNodeType aAppearance, + ToolbarButtonGTKMetrics* aMetrics) { + gint iconWidth, iconHeight; + if (!gtk_icon_size_lookup(GTK_ICON_SIZE_MENU, &iconWidth, &iconHeight)) { + NS_WARNING("Failed to get Gtk+ icon size for titlebar button!"); + + // Use some reasonable fallback size + iconWidth = 16; + iconHeight = 16; + } + + GtkStyleContext* style = GetStyleContext(aAppearance); + gint width = 0, height = 0; + if (!gtk_check_version(3, 20, 0)) { + gtk_style_context_get(style, gtk_style_context_get_state(style), + "min-width", &width, "min-height", &height, NULL); + } + + // Cover cases when min-width/min-height is not set, it's invalid + // or we're running on Gtk+ < 3.20. + if (width < iconWidth) width = iconWidth; + if (height < iconHeight) height = iconHeight; + + gint left = 0, top = 0, right = 0, bottom = 0; + moz_gtk_add_border_padding(style, &left, &top, &right, &bottom); + + // Button size is calculated as min-width/height + border/padding. + width += left + right; + height += top + bottom; + + // Place icon at button center. + aMetrics->iconXPosition = (width - iconWidth) / 2; + aMetrics->iconYPosition = (height - iconHeight) / 2; + + aMetrics->minSizeWithBorderMargin.width = width; + aMetrics->minSizeWithBorderMargin.height = height; +} + +// We support LTR layout only here for now. +static void CalculateToolbarButtonSpacing(WidgetNodeType aAppearance, + ToolbarButtonGTKMetrics* aMetrics) { + GtkStyleContext* style = GetStyleContext(aAppearance); + gtk_style_context_get_margin(style, gtk_style_context_get_state(style), + &aMetrics->buttonMargin); + + // Get titlebar spacing, a default one is 6 pixels (gtk/gtkheaderbar.c) + gint buttonSpacing = 6; + g_object_get(GetWidget(MOZ_GTK_HEADER_BAR), "spacing", &buttonSpacing, + nullptr); + + // We apply spacing as a margin equally to both adjacent buttons. + buttonSpacing /= 2; + + if (!aMetrics->firstButton) { + aMetrics->buttonMargin.left += buttonSpacing; + } + if (!aMetrics->lastButton) { + aMetrics->buttonMargin.right += buttonSpacing; + } + + aMetrics->minSizeWithBorderMargin.width += + aMetrics->buttonMargin.right + aMetrics->buttonMargin.left; + aMetrics->minSizeWithBorderMargin.height += + aMetrics->buttonMargin.top + aMetrics->buttonMargin.bottom; +} + +size_t GetGtkHeaderBarButtonLayout(Span<ButtonLayout> aButtonLayout, + bool* aReversedButtonsPlacement) { + gchar* decorationLayoutSetting = nullptr; + GtkSettings* settings = gtk_settings_get_default(); + g_object_get(settings, "gtk-decoration-layout", &decorationLayoutSetting, + nullptr); + auto free = mozilla::MakeScopeExit([&] { g_free(decorationLayoutSetting); }); + + // Use a default layout + const gchar* decorationLayout = "menu:minimize,maximize,close"; + if (decorationLayoutSetting) { + decorationLayout = decorationLayoutSetting; + } + + // "minimize,maximize,close:" layout means buttons are on the opposite + // titlebar side. close button is always there. + if (aReversedButtonsPlacement) { + const char* closeButton = strstr(decorationLayout, "close"); + const char* separator = strchr(decorationLayout, ':'); + *aReversedButtonsPlacement = + closeButton && separator && closeButton < separator; + } + + // We check what position a button string is stored in decorationLayout. + // + // decorationLayout gets its value from the GNOME preference: + // org.gnome.desktop.vm.preferences.button-layout via the + // gtk-decoration-layout property. + // + // Documentation of the gtk-decoration-layout property can be found here: + // https://developer.gnome.org/gtk3/stable/GtkSettings.html#GtkSettings--gtk-decoration-layout + if (aButtonLayout.IsEmpty()) { + return 0; + } + + nsDependentCSubstring layout(decorationLayout, strlen(decorationLayout)); + + size_t activeButtons = 0; + for (const auto& part : layout.Split(':')) { + for (const auto& button : part.Split(',')) { + if (button.EqualsLiteral("close")) { + aButtonLayout[activeButtons++] = {MOZ_GTK_HEADER_BAR_BUTTON_CLOSE}; + } else if (button.EqualsLiteral("minimize")) { + aButtonLayout[activeButtons++] = {MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE}; + } else if (button.EqualsLiteral("maximize")) { + aButtonLayout[activeButtons++] = {MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE}; + } + if (activeButtons == aButtonLayout.Length()) { + return activeButtons; + } + } + } + return activeButtons; +} + +static void EnsureToolbarMetrics() { + if (sToolbarMetrics.initialized) { + return; + } + // Make sure we have clean cache after theme reset, etc. + memset(&sToolbarMetrics, 0, sizeof(sToolbarMetrics)); + + // Calculate titlebar button visibility and positions. + ButtonLayout aButtonLayout[TOOLBAR_BUTTONS]; + size_t activeButtonNums = + GetGtkHeaderBarButtonLayout(Span(aButtonLayout), nullptr); + + for (size_t i = 0; i < activeButtonNums; i++) { + int buttonIndex = + (aButtonLayout[i].mType - MOZ_GTK_HEADER_BAR_BUTTON_CLOSE); + ToolbarButtonGTKMetrics* metrics = sToolbarMetrics.button + buttonIndex; + metrics->visible = true; + // Mark first button + if (!i) { + metrics->firstButton = true; + } + // Mark last button. + if (i == (activeButtonNums - 1)) { + metrics->lastButton = true; + } + + CalculateToolbarButtonMetrics(aButtonLayout[i].mType, metrics); + CalculateToolbarButtonSpacing(aButtonLayout[i].mType, metrics); + } + + sToolbarMetrics.initialized = true; +} + +const ToolbarButtonGTKMetrics* GetToolbarButtonMetrics( + WidgetNodeType aAppearance) { + EnsureToolbarMetrics(); + + int buttonIndex = (aAppearance - MOZ_GTK_HEADER_BAR_BUTTON_CLOSE); + NS_ASSERTION(buttonIndex >= 0 && buttonIndex <= TOOLBAR_BUTTONS, + "GetToolbarButtonMetrics(): Wrong titlebar button!"); + return sToolbarMetrics.button + buttonIndex; +} + +static gint moz_gtk_window_decoration_paint(cairo_t* cr, + const GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + if (mozilla::widget::GdkIsWaylandDisplay()) { + // Doesn't seem to be needed. + return MOZ_GTK_SUCCESS; + } + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + GtkStyleContext* windowStyle = + GetStyleContext(MOZ_GTK_HEADERBAR_WINDOW, state->image_scale); + const bool solidDecorations = + gtk_style_context_has_class(windowStyle, "solid-csd"); + GtkStyleContext* decorationStyle = + GetStyleContext(solidDecorations ? MOZ_GTK_WINDOW_DECORATION_SOLID + : MOZ_GTK_WINDOW_DECORATION, + state->image_scale, GTK_TEXT_DIR_LTR, state_flags); + + gtk_render_background(decorationStyle, cr, rect->x, rect->y, rect->width, + rect->height); + gtk_render_frame(decorationStyle, cr, rect->x, rect->y, rect->width, + rect->height); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_button_paint(cairo_t* cr, const GdkRectangle* rect, + GtkWidgetState* state, GtkReliefStyle relief, + GtkWidget* widget, + GtkTextDirection direction) { + if (!widget) { + return MOZ_GTK_UNKNOWN_WIDGET; + } + + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + GtkStyleContext* style = gtk_widget_get_style_context(widget); + gint x = rect->x, y = rect->y, width = rect->width, height = rect->height; + + gtk_widget_set_direction(widget, direction); + + gtk_style_context_save(style); + StyleContextSetScale(style, state->image_scale); + gtk_style_context_set_state(style, state_flags); + + if (state->isDefault && relief == GTK_RELIEF_NORMAL && !state->focused && + !(state_flags & GTK_STATE_FLAG_PRELIGHT)) { + /* handle default borders both outside and inside the button */ + gint default_top, default_left, default_bottom, default_right; + moz_gtk_button_get_default_overflow(&default_top, &default_left, + &default_bottom, &default_right); + x -= default_left; + y -= default_top; + width += default_left + default_right; + height += default_top + default_bottom; + gtk_render_background(style, cr, x, y, width, height); + gtk_render_frame(style, cr, x, y, width, height); + moz_gtk_button_get_default_border(&default_top, &default_left, + &default_bottom, &default_right); + x += default_left; + y += default_top; + width -= (default_left + default_right); + height -= (default_top + default_bottom); + } else if (relief != GTK_RELIEF_NONE || state->depressed || + (state_flags & GTK_STATE_FLAG_PRELIGHT)) { + /* the following line can trigger an assertion (Crux theme) + file ../../gdk/gdkwindow.c: line 1846 (gdk_window_clear_area): + assertion `GDK_IS_WINDOW (window)' failed */ + gtk_render_background(style, cr, x, y, width, height); + gtk_render_frame(style, cr, x, y, width, height); + } + + if (state->focused) { + GtkBorder border; + gtk_style_context_get_border(style, state_flags, &border); + x += border.left; + y += border.top; + width -= (border.left + border.right); + height -= (border.top + border.bottom); + gtk_render_focus(style, cr, x, y, width, height); + } + gtk_style_context_restore(style); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_header_bar_button_paint(cairo_t* cr, + const GdkRectangle* aRect, + GtkWidgetState* state, + GtkReliefStyle relief, + WidgetNodeType aIconWidgetType, + GtkTextDirection direction) { + GdkRectangle rect = *aRect; + // We need to inset our calculated margin because it also + // contains titlebar button spacing. + const ToolbarButtonGTKMetrics* metrics = GetToolbarButtonMetrics( + aIconWidgetType == MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE + ? MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE + : aIconWidgetType); + Inset(&rect, metrics->buttonMargin); + + GtkWidget* buttonWidget = GetWidget(aIconWidgetType); + if (!buttonWidget) { + return MOZ_GTK_UNKNOWN_WIDGET; + } + moz_gtk_button_paint(cr, &rect, state, relief, buttonWidget, direction); + + GtkWidget* iconWidget = + gtk_bin_get_child(GTK_BIN(GetWidget(aIconWidgetType))); + if (!iconWidget) { + return MOZ_GTK_UNKNOWN_WIDGET; + } + cairo_surface_t* surface = + GetWidgetIconSurface(iconWidget, state->image_scale); + + if (surface) { + GtkStyleContext* style = gtk_widget_get_style_context(buttonWidget); + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + + gtk_style_context_save(style); + StyleContextSetScale(style, state->image_scale); + gtk_style_context_set_state(style, state_flags); + + /* This is available since Gtk+ 3.10 as well as GtkHeaderBar */ + gtk_render_icon_surface(style, cr, surface, rect.x + metrics->iconXPosition, + rect.y + metrics->iconYPosition); + gtk_style_context_restore(style); + } + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_toggle_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, gboolean selected, + gboolean inconsistent, gboolean isradio, + GtkTextDirection direction) { + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + gint x, y, width, height; + GtkStyleContext* style; + + // We need to call this before GetStyleContext, because otherwise we would + // reset state flags + const ToggleGTKMetrics* metrics = + GetToggleMetrics(isradio ? MOZ_GTK_RADIOBUTTON : MOZ_GTK_CHECKBUTTON); + // Clamp the rect and paint it center aligned in the rect. + x = rect->x; + y = rect->y; + width = rect->width; + height = rect->height; + + if (rect->width < rect->height) { + y = rect->y + (rect->height - rect->width) / 2; + height = rect->width; + } + + if (rect->height < rect->width) { + x = rect->x + (rect->width - rect->height) / 2; + width = rect->height; + } + + if (selected) + state_flags = + static_cast<GtkStateFlags>(state_flags | checkbox_check_state); + + if (inconsistent) + state_flags = + static_cast<GtkStateFlags>(state_flags | GTK_STATE_FLAG_INCONSISTENT); + + style = GetStyleContext(isradio ? MOZ_GTK_RADIOBUTTON : MOZ_GTK_CHECKBUTTON, + state->image_scale, direction, state_flags); + + if (gtk_check_version(3, 20, 0) == nullptr) { + gtk_render_background(style, cr, x, y, width, height); + gtk_render_frame(style, cr, x, y, width, height); + // Indicator is inset by the toggle's padding and border. + gint indicator_x = x + metrics->borderAndPadding.left; + gint indicator_y = y + metrics->borderAndPadding.top; + gint indicator_width = metrics->minSizeWithBorder.width - + metrics->borderAndPadding.left - + metrics->borderAndPadding.right; + gint indicator_height = metrics->minSizeWithBorder.height - + metrics->borderAndPadding.top - + metrics->borderAndPadding.bottom; + if (isradio) { + gtk_render_option(style, cr, indicator_x, indicator_y, indicator_width, + indicator_height); + } else { + gtk_render_check(style, cr, indicator_x, indicator_y, indicator_width, + indicator_height); + } + } else { + if (isradio) { + gtk_render_option(style, cr, x, y, width, height); + } else { + gtk_render_check(style, cr, x, y, width, height); + } + } + + return MOZ_GTK_SUCCESS; +} + +static gint calculate_button_inner_rect(GtkWidget* button, + const GdkRectangle* rect, + GdkRectangle* inner_rect, + GtkTextDirection direction) { + GtkStyleContext* style; + GtkBorder border; + GtkBorder padding = {0, 0, 0, 0}; + + style = gtk_widget_get_style_context(button); + + /* This mirrors gtkbutton's child positioning */ + gtk_style_context_get_border(style, gtk_style_context_get_state(style), + &border); + gtk_style_context_get_padding(style, gtk_style_context_get_state(style), + &padding); + + inner_rect->x = rect->x + border.left + padding.left; + inner_rect->y = rect->y + padding.top + border.top; + inner_rect->width = + MAX(1, rect->width - padding.left - padding.right - border.left * 2); + inner_rect->height = + MAX(1, rect->height - padding.top - padding.bottom - border.top * 2); + + return MOZ_GTK_SUCCESS; +} + +static gint calculate_arrow_rect(GtkWidget* arrow, GdkRectangle* rect, + GdkRectangle* arrow_rect, + GtkTextDirection direction) { + /* defined in gtkarrow.c */ + gfloat arrow_scaling = 0.7; + gfloat xalign, xpad; + gint extent; + gint mxpad, mypad; + gfloat mxalign, myalign; + GtkMisc* misc = GTK_MISC(arrow); + + gtk_style_context_get_style(gtk_widget_get_style_context(arrow), + "arrow_scaling", &arrow_scaling, NULL); + + gtk_misc_get_padding(misc, &mxpad, &mypad); + extent = MIN((rect->width - mxpad * 2), (rect->height - mypad * 2)) * + arrow_scaling; + + gtk_misc_get_alignment(misc, &mxalign, &myalign); + + xalign = direction == GTK_TEXT_DIR_LTR ? mxalign : 1.0 - mxalign; + xpad = mxpad + (rect->width - extent) * xalign; + + arrow_rect->x = direction == GTK_TEXT_DIR_LTR ? floor(rect->x + xpad) + : ceil(rect->x + xpad); + arrow_rect->y = floor(rect->y + mypad + ((rect->height - extent) * myalign)); + + arrow_rect->width = arrow_rect->height = extent; + + return MOZ_GTK_SUCCESS; +} + +/** + * Get minimum widget size as sum of margin, padding, border and + * min-width/min-height. + */ +static void moz_gtk_get_widget_min_size(GtkStyleContext* style, int* width, + int* height) { + GtkStateFlags state_flags = gtk_style_context_get_state(style); + gtk_style_context_get(style, state_flags, "min-height", height, "min-width", + width, nullptr); + + GtkBorder border, padding, margin; + gtk_style_context_get_border(style, state_flags, &border); + gtk_style_context_get_padding(style, state_flags, &padding); + gtk_style_context_get_margin(style, state_flags, &margin); + + *width += border.left + border.right + margin.left + margin.right + + padding.left + padding.right; + *height += border.top + border.bottom + margin.top + margin.bottom + + padding.top + padding.bottom; +} + +static void Inset(GdkRectangle* rect, const GtkBorder& aBorder) { + rect->x += aBorder.left; + rect->y += aBorder.top; + rect->width -= aBorder.left + aBorder.right; + rect->height -= aBorder.top + aBorder.bottom; +} + +// Inset a rectangle by the margins specified in a style context. +static void InsetByMargin(GdkRectangle* rect, GtkStyleContext* style) { + GtkBorder margin; + gtk_style_context_get_margin(style, gtk_style_context_get_state(style), + &margin); + Inset(rect, margin); +} + +// Inset a rectangle by the border and padding specified in a style context. +static void InsetByBorderPadding(GdkRectangle* rect, GtkStyleContext* style) { + GtkStateFlags state = gtk_style_context_get_state(style); + GtkBorder padding, border; + + gtk_style_context_get_padding(style, state, &padding); + Inset(rect, padding); + gtk_style_context_get_border(style, state, &border); + Inset(rect, border); +} + +static void moz_gtk_draw_styled_frame(GtkStyleContext* style, cairo_t* cr, + const GdkRectangle* aRect, + bool drawFocus) { + GdkRectangle rect = *aRect; + + InsetByMargin(&rect, style); + + gtk_render_background(style, cr, rect.x, rect.y, rect.width, rect.height); + gtk_render_frame(style, cr, rect.x, rect.y, rect.width, rect.height); + if (drawFocus) { + gtk_render_focus(style, cr, rect.x, rect.y, rect.width, rect.height); + } +} + +static gint moz_gtk_inner_spin_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_SPINBUTTON, state->image_scale, direction, + GetStateFlagsFromGtkWidgetState(state)); + + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + + /* hard code these values */ + GdkRectangle arrow_rect; + arrow_rect.width = 6; + arrow_rect.height = 6; + + // align spin to the left + arrow_rect.x = rect->x; + + // up button + arrow_rect.y = rect->y + (rect->height - arrow_rect.height) / 2 - 3; + gtk_render_arrow(style, cr, ARROW_UP, arrow_rect.x, arrow_rect.y, + arrow_rect.width); + + // down button + arrow_rect.y = rect->y + (rect->height - arrow_rect.height) / 2 + 3; + gtk_render_arrow(style, cr, ARROW_DOWN, arrow_rect.x, arrow_rect.y, + arrow_rect.width); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_spin_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_SPINBUTTON, state->image_scale, direction); + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_spin_updown_paint(cairo_t* cr, GdkRectangle* rect, + gboolean isDown, GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_SPINBUTTON, state->image_scale, direction, + GetStateFlagsFromGtkWidgetState(state)); + + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + + /* hard code these values */ + GdkRectangle arrow_rect; + arrow_rect.width = 6; + arrow_rect.height = 6; + arrow_rect.x = rect->x + (rect->width - arrow_rect.width) / 2; + arrow_rect.y = rect->y + (rect->height - arrow_rect.height) / 2; + arrow_rect.y += isDown ? -1 : 1; + + gtk_render_arrow(style, cr, isDown ? ARROW_DOWN : ARROW_UP, arrow_rect.x, + arrow_rect.y, arrow_rect.width); + + return MOZ_GTK_SUCCESS; +} + +/* See gtk_range_draw() for reference. + */ +static gint moz_gtk_scale_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, GtkOrientation flags, + GtkTextDirection direction) { + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + gint x, y, width, height, min_width, min_height; + GtkStyleContext* style; + GtkBorder margin; + + moz_gtk_get_scale_metrics(flags, &min_width, &min_height); + + WidgetNodeType widget = (flags == GTK_ORIENTATION_HORIZONTAL) + ? MOZ_GTK_SCALE_TROUGH_HORIZONTAL + : MOZ_GTK_SCALE_TROUGH_VERTICAL; + style = GetStyleContext(widget, state->image_scale, direction, state_flags); + gtk_style_context_get_margin(style, state_flags, &margin); + + // Clamp the dimension perpendicular to the direction that the slider crosses + // to the minimum size. + if (flags == GTK_ORIENTATION_HORIZONTAL) { + width = rect->width - (margin.left + margin.right); + height = min_height - (margin.top + margin.bottom); + x = rect->x + margin.left; + y = rect->y + (rect->height - height) / 2; + } else { + width = min_width - (margin.left + margin.right); + height = rect->height - (margin.top + margin.bottom); + x = rect->x + (rect->width - width) / 2; + y = rect->y + margin.top; + } + + gtk_render_background(style, cr, x, y, width, height); + gtk_render_frame(style, cr, x, y, width, height); + + if (state->focused) + gtk_render_focus(style, cr, rect->x, rect->y, rect->width, rect->height); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_scale_thumb_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkOrientation flags, + GtkTextDirection direction) { + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + GtkStyleContext* style; + gint thumb_width, thumb_height, x, y; + + /* determine the thumb size, and position the thumb in the center in the + * opposite axis + */ + if (flags == GTK_ORIENTATION_HORIZONTAL) { + moz_gtk_get_scalethumb_metrics(GTK_ORIENTATION_HORIZONTAL, &thumb_width, + &thumb_height); + x = rect->x; + y = rect->y + (rect->height - thumb_height) / 2; + } else { + moz_gtk_get_scalethumb_metrics(GTK_ORIENTATION_VERTICAL, &thumb_height, + &thumb_width); + x = rect->x + (rect->width - thumb_width) / 2; + y = rect->y; + } + + WidgetNodeType widget = (flags == GTK_ORIENTATION_HORIZONTAL) + ? MOZ_GTK_SCALE_THUMB_HORIZONTAL + : MOZ_GTK_SCALE_THUMB_VERTICAL; + style = GetStyleContext(widget, state->image_scale, direction, state_flags); + gtk_render_slider(style, cr, x, y, thumb_width, thumb_height, flags); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_hpaned_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_SPLITTER_SEPARATOR_HORIZONTAL, state->image_scale, + GTK_TEXT_DIR_LTR, GetStateFlagsFromGtkWidgetState(state)); + gtk_render_handle(style, cr, rect->x, rect->y, rect->width, rect->height); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_vpaned_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_SPLITTER_SEPARATOR_VERTICAL, state->image_scale, + GTK_TEXT_DIR_LTR, GetStateFlagsFromGtkWidgetState(state)); + gtk_render_handle(style, cr, rect->x, rect->y, rect->width, rect->height); + return MOZ_GTK_SUCCESS; +} + +// See gtk_entry_draw() for reference. +static gint moz_gtk_entry_paint(cairo_t* cr, const GdkRectangle* aRect, + GtkWidgetState* state, GtkStyleContext* style, + WidgetNodeType widget) { + GdkRectangle rect = *aRect; + gtk_render_background(style, cr, rect.x, rect.y, rect.width, rect.height); + + // Paint the border, except for 'menulist-textfield' that isn't focused: + if (widget != MOZ_GTK_DROPDOWN_ENTRY || state->focused) { + gtk_render_frame(style, cr, rect.x, rect.y, rect.width, rect.height); + } + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_text_view_paint(cairo_t* cr, GdkRectangle* aRect, + GtkWidgetState* state, + GtkTextDirection direction) { + // GtkTextView and GtkScrolledWindow do not set active and prelight flags. + // The use of focus with MOZ_GTK_SCROLLED_WINDOW here is questionable + // because a parent widget will not have focus when its child GtkTextView + // has focus, but perhaps this may help identify a focused textarea with + // some themes as GtkTextView backgrounds do not typically render + // differently with focus. + GtkStateFlags state_flags = state->disabled ? GTK_STATE_FLAG_INSENSITIVE + : state->focused ? GTK_STATE_FLAG_FOCUSED + : GTK_STATE_FLAG_NORMAL; + + GtkStyleContext* style_frame = GetStyleContext( + MOZ_GTK_SCROLLED_WINDOW, state->image_scale, direction, state_flags); + gtk_render_frame(style_frame, cr, aRect->x, aRect->y, aRect->width, + aRect->height); + + GdkRectangle rect = *aRect; + InsetByBorderPadding(&rect, style_frame); + + GtkStyleContext* style = GetStyleContext( + MOZ_GTK_TEXT_VIEW, state->image_scale, direction, state_flags); + gtk_render_background(style, cr, rect.x, rect.y, rect.width, rect.height); + // There is a separate "text" window, which usually provides the + // background behind the text. However, this is transparent in Ambiance + // for GTK 3.20, in which case the MOZ_GTK_TEXT_VIEW background is + // visible. + style = GetStyleContext(MOZ_GTK_TEXT_VIEW_TEXT, state->image_scale, direction, + state_flags); + gtk_render_background(style, cr, rect.x, rect.y, rect.width, rect.height); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_treeview_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + gint xthickness, ythickness; + GtkStyleContext* style; + GtkStyleContext* style_tree; + GtkStateFlags state_flags; + GtkBorder border; + + /* only handle disabled and normal states, otherwise the whole background + * area will be painted differently with other states */ + state_flags = + state->disabled ? GTK_STATE_FLAG_INSENSITIVE : GTK_STATE_FLAG_NORMAL; + + style = + GetStyleContext(MOZ_GTK_SCROLLED_WINDOW, state->image_scale, direction); + gtk_style_context_get_border(style, state_flags, &border); + xthickness = border.left; + ythickness = border.top; + + style_tree = + GetStyleContext(MOZ_GTK_TREEVIEW_VIEW, state->image_scale, direction); + gtk_render_background(style_tree, cr, rect->x + xthickness, + rect->y + ythickness, rect->width - 2 * xthickness, + rect->height - 2 * ythickness); + + style = + GetStyleContext(MOZ_GTK_SCROLLED_WINDOW, state->image_scale, direction); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_tree_header_cell_paint(cairo_t* cr, + const GdkRectangle* aRect, + GtkWidgetState* state, + gboolean isSorted, + GtkTextDirection direction) { + moz_gtk_button_paint(cr, aRect, state, GTK_RELIEF_NORMAL, + GetWidget(MOZ_GTK_TREE_HEADER_CELL), direction); + return MOZ_GTK_SUCCESS; +} + +/* See gtk_expander_paint() for reference. + */ +static gint moz_gtk_treeview_expander_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkExpanderStyle expander_state, + GtkTextDirection direction) { + /* Because the frame we get is of the entire treeview, we can't get the + * precise event state of one expander, thus rendering hover and active + * feedback useless. */ + GtkStateFlags state_flags = + state->disabled ? GTK_STATE_FLAG_INSENSITIVE : GTK_STATE_FLAG_NORMAL; + + if (state->inHover) + state_flags = + static_cast<GtkStateFlags>(state_flags | GTK_STATE_FLAG_PRELIGHT); + if (state->selected) + state_flags = + static_cast<GtkStateFlags>(state_flags | GTK_STATE_FLAG_SELECTED); + + /* GTK_STATE_FLAG_ACTIVE controls expanded/colapsed state rendering + * in gtk_render_expander() + */ + if (expander_state == GTK_EXPANDER_EXPANDED) + state_flags = + static_cast<GtkStateFlags>(state_flags | checkbox_check_state); + else + state_flags = + static_cast<GtkStateFlags>(state_flags & ~(checkbox_check_state)); + + GtkStyleContext* style = GetStyleContext( + MOZ_GTK_TREEVIEW_EXPANDER, state->image_scale, direction, state_flags); + gtk_render_expander(style, cr, rect->x, rect->y, rect->width, rect->height); + + return MOZ_GTK_SUCCESS; +} + +/* See gtk_separator_draw() for reference. + */ +static gint moz_gtk_combo_box_paint(cairo_t* cr, const GdkRectangle* aRect, + GtkWidgetState* state, + GtkTextDirection direction) { + GdkRectangle arrow_rect, real_arrow_rect; + gint separator_width; + gboolean wide_separators; + GtkStyleContext* style; + GtkRequisition arrow_req; + + GtkWidget* comboBoxButton = GetWidget(MOZ_GTK_COMBOBOX_BUTTON); + GtkWidget* comboBoxArrow = GetWidget(MOZ_GTK_COMBOBOX_ARROW); + if (!comboBoxButton || !comboBoxArrow) { + return MOZ_GTK_UNKNOWN_WIDGET; + } + + /* Also sets the direction on gComboBoxButtonWidget, which is then + * inherited by the separator and arrow */ + moz_gtk_button_paint(cr, aRect, state, GTK_RELIEF_NORMAL, comboBoxButton, + direction); + + calculate_button_inner_rect(comboBoxButton, aRect, &arrow_rect, direction); + /* Now arrow_rect contains the inner rect ; we want to correct the width + * to what the arrow needs (see gtk_combo_box_size_allocate) */ + gtk_widget_get_preferred_size(comboBoxArrow, NULL, &arrow_req); + moz_gtk_sanity_preferred_size(&arrow_req); + + if (direction == GTK_TEXT_DIR_LTR) + arrow_rect.x += arrow_rect.width - arrow_req.width; + arrow_rect.width = arrow_req.width; + + calculate_arrow_rect(comboBoxArrow, &arrow_rect, &real_arrow_rect, direction); + + style = GetStyleContext(MOZ_GTK_COMBOBOX_ARROW, state->image_scale); + gtk_render_arrow(style, cr, ARROW_DOWN, real_arrow_rect.x, real_arrow_rect.y, + real_arrow_rect.width); + + /* If there is no separator in the theme, there's nothing left to do. */ + GtkWidget* widget = GetWidget(MOZ_GTK_COMBOBOX_SEPARATOR); + if (!widget) { + return MOZ_GTK_SUCCESS; + } + style = gtk_widget_get_style_context(widget); + StyleContextSetScale(style, state->image_scale); + gtk_style_context_get_style(style, "wide-separators", &wide_separators, + "separator-width", &separator_width, NULL); + + if (wide_separators) { + if (direction == GTK_TEXT_DIR_LTR) + arrow_rect.x -= separator_width; + else + arrow_rect.x += arrow_rect.width; + + gtk_render_frame(style, cr, arrow_rect.x, arrow_rect.y, separator_width, + arrow_rect.height); + } else { + if (direction == GTK_TEXT_DIR_LTR) { + GtkBorder padding; + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + gtk_style_context_get_padding(style, state_flags, &padding); + arrow_rect.x -= padding.left; + } else + arrow_rect.x += arrow_rect.width; + + gtk_render_line(style, cr, arrow_rect.x, arrow_rect.y, arrow_rect.x, + arrow_rect.y + arrow_rect.height); + } + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_arrow_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, GtkArrowType arrow_type, + GtkTextDirection direction) { + GdkRectangle arrow_rect; + gdouble arrow_angle; + + if (direction == GTK_TEXT_DIR_RTL) { + if (arrow_type == GTK_ARROW_LEFT) { + arrow_type = GTK_ARROW_RIGHT; + } else if (arrow_type == GTK_ARROW_RIGHT) { + arrow_type = GTK_ARROW_LEFT; + } + } + switch (arrow_type) { + case GTK_ARROW_LEFT: + arrow_angle = ARROW_LEFT; + break; + case GTK_ARROW_RIGHT: + arrow_angle = ARROW_RIGHT; + break; + case GTK_ARROW_DOWN: + arrow_angle = ARROW_DOWN; + break; + default: + arrow_angle = ARROW_UP; + break; + } + if (arrow_type == GTK_ARROW_NONE) return MOZ_GTK_SUCCESS; + + GtkWidget* widget = GetWidget(MOZ_GTK_BUTTON_ARROW); + if (!widget) { + return MOZ_GTK_UNKNOWN_WIDGET; + } + calculate_arrow_rect(widget, rect, &arrow_rect, direction); + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + GtkStyleContext* style = GetStyleContext( + MOZ_GTK_BUTTON_ARROW, state->image_scale, direction, state_flags); + gtk_render_arrow(style, cr, arrow_angle, arrow_rect.x, arrow_rect.y, + arrow_rect.width); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_tooltip_paint(cairo_t* cr, const GdkRectangle* aRect, + GtkWidgetState* state, + GtkTextDirection direction) { + // Tooltip widget is made in GTK3 as following tree: + // Tooltip window + // Horizontal Box + // Icon (not supported by Firefox) + // Label + // Each element can be fully styled by CSS of GTK theme. + // We have to draw all elements with appropriate offset and right dimensions. + + // Tooltip drawing + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_TOOLTIP, state->image_scale, direction); + GdkRectangle rect = *aRect; + gtk_render_background(style, cr, rect.x, rect.y, rect.width, rect.height); + gtk_render_frame(style, cr, rect.x, rect.y, rect.width, rect.height); + + // Horizontal Box drawing + // + // The box element has hard-coded 6px margin-* GtkWidget properties, which + // are added between the window dimensions and the CSS margin box of the + // horizontal box. The frame of the tooltip window is drawn in the + // 6px margin. + // For drawing Horizontal Box we have to inset drawing area by that 6px + // plus its CSS margin. + GtkStyleContext* boxStyle = + GetStyleContext(MOZ_GTK_TOOLTIP_BOX, state->image_scale, direction); + + rect.x += 6; + rect.y += 6; + rect.width -= 12; + rect.height -= 12; + + InsetByMargin(&rect, boxStyle); + gtk_render_background(boxStyle, cr, rect.x, rect.y, rect.width, rect.height); + gtk_render_frame(boxStyle, cr, rect.x, rect.y, rect.width, rect.height); + + // Label drawing + InsetByBorderPadding(&rect, boxStyle); + + GtkStyleContext* labelStyle = + GetStyleContext(MOZ_GTK_TOOLTIP_BOX_LABEL, state->image_scale, direction); + moz_gtk_draw_styled_frame(labelStyle, cr, &rect, false); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_resizer_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_RESIZER, state->image_scale, GTK_TEXT_DIR_LTR, + GetStateFlagsFromGtkWidgetState(state)); + + // Workaround unico not respecting the text direction for resizers. + // See bug 1174248. + cairo_save(cr); + if (direction == GTK_TEXT_DIR_RTL) { + cairo_matrix_t mat; + cairo_matrix_init_translate(&mat, 2 * rect->x + rect->width, 0); + cairo_matrix_scale(&mat, -1, 1); + cairo_transform(cr, &mat); + } + + gtk_render_handle(style, cr, rect->x, rect->y, rect->width, rect->height); + cairo_restore(cr); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_frame_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_FRAME, state->image_scale, direction); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_progressbar_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_PROGRESS_TROUGH, state->image_scale, direction); + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_progress_chunk_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction, + WidgetNodeType widget) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_PROGRESS_CHUNK, state->image_scale, direction); + + if (widget == MOZ_GTK_PROGRESS_CHUNK_INDETERMINATE || + widget == MOZ_GTK_PROGRESS_CHUNK_VERTICAL_INDETERMINATE) { + /** + * The bar's size and the bar speed are set depending of the progress' + * size. These could also be constant for all progress bars easily. + */ + gboolean vertical = + (widget == MOZ_GTK_PROGRESS_CHUNK_VERTICAL_INDETERMINATE); + + /* The size of the dimension we are going to use for the animation. */ + const gint progressSize = vertical ? rect->height : rect->width; + + /* The bar is using a fifth of the element size, based on GtkProgressBar + * activity-blocks property. */ + const gint barSize = MAX(1, progressSize / 5); + + /* Represents the travel that has to be done for a complete cycle. */ + const gint travel = 2 * (progressSize - barSize); + + /* period equals to travel / pixelsPerMillisecond + * where pixelsPerMillisecond equals progressSize / 1000.0. + * This is equivalent to 1600. */ + static const guint period = 1600; + const gint t = PR_IntervalToMilliseconds(PR_IntervalNow()) % period; + const gint dx = travel * t / period; + + if (vertical) { + rect->y += (dx < travel / 2) ? dx : travel - dx; + rect->height = barSize; + } else { + rect->x += (dx < travel / 2) ? dx : travel - dx; + rect->width = barSize; + } + } + + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_get_tab_thickness(GtkStyleContext* style) { + if (!notebook_has_tab_gap) + return 0; /* tabs do not overdraw the tabpanel border with "no gap" style */ + + GtkBorder border; + gtk_style_context_get_border(style, gtk_style_context_get_state(style), + &border); + if (border.top < 2) return 2; /* some themes don't set ythickness correctly */ + + return border.top; +} + +gint moz_gtk_get_tab_thickness(WidgetNodeType aNodeType) { + GtkStyleContext* style = GetStyleContext(aNodeType); + int thickness = moz_gtk_get_tab_thickness(style); + return thickness; +} + +/* actual small tabs */ +static gint moz_gtk_tab_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, GtkTabFlags flags, + GtkTextDirection direction, + WidgetNodeType widget) { + /* When the tab isn't selected, we just draw a notebook extension. + * When it is selected, we overwrite the adjacent border of the tabpanel + * touching the tab with a pierced border (called "the gap") to make the + * tab appear physically attached to the tabpanel; see details below. */ + + GtkStyleContext* style; + GdkRectangle tabRect; + GdkRectangle focusRect; + GdkRectangle backRect; + int initial_gap = 0; + bool isBottomTab = (widget == MOZ_GTK_TAB_BOTTOM); + + style = GetStyleContext(widget, state->image_scale, direction, + GetStateFlagsFromGtkTabFlags(flags)); + tabRect = *rect; + + if (flags & MOZ_GTK_TAB_FIRST) { + gtk_style_context_get_style(style, "initial-gap", &initial_gap, NULL); + tabRect.width -= initial_gap; + + if (direction != GTK_TEXT_DIR_RTL) { + tabRect.x += initial_gap; + } + } + + focusRect = backRect = tabRect; + + if (notebook_has_tab_gap) { + if ((flags & MOZ_GTK_TAB_SELECTED) == 0) { + /* Only draw the tab */ + gtk_render_extension(style, cr, tabRect.x, tabRect.y, tabRect.width, + tabRect.height, + isBottomTab ? GTK_POS_TOP : GTK_POS_BOTTOM); + } else { + /* Draw the tab and the gap + * We want the gap to be positioned exactly on the tabpanel top + * border; since tabbox.css may set a negative margin so that the tab + * frame rect already overlaps the tabpanel frame rect, we need to take + * that into account when drawing. To that effect, nsNativeThemeGTK + * passes us this negative margin (bmargin in the graphic below) in the + * lowest bits of |flags|. We use it to set gap_voffset, the distance + * between the top of the gap and the bottom of the tab (resp. the + * bottom of the gap and the top of the tab when we draw a bottom tab), + * while ensuring that the gap always touches the border of the tab, + * i.e. 0 <= gap_voffset <= gap_height, to avoid surprinsing results + * with big negative or positive margins. + * Here is a graphical explanation in the case of top tabs: + * ___________________________ + * / \ + * | T A B | + * ----------|. . . . . . . . . . . . . . .|----- top of tabpanel + * : ^ bmargin : ^ + * : | (-negative margin, : | + * bottom : v passed in flags) : | gap_height + * of -> :.............................: | (the size of the + * the tab . part of the gap . | tabpanel top border) + * . outside of the tab . v + * ---------------------------------------------- + * + * To draw the gap, we use gtk_render_frame_gap(), see comment in + * moz_gtk_tabpanels_paint(). This gap is made 3 * gap_height tall, + * which should suffice to ensure that the only visible border is the + * pierced one. If the tab is in the middle, we make the box_gap begin + * a bit to the left of the tab and end a bit to the right, adjusting + * the gap position so it still is under the tab, because we want the + * rendering of a gap in the middle of a tabpanel. This is the role of + * the gints gap_{l,r}_offset. On the contrary, if the tab is the + * first, we align the start border of the box_gap with the start + * border of the tab (left if LTR, right if RTL), by setting the + * appropriate offset to 0.*/ + gint gap_loffset, gap_roffset, gap_voffset, gap_height; + + /* Get height needed by the gap */ + gap_height = moz_gtk_get_tab_thickness(style); + + /* Extract gap_voffset from the first bits of flags */ + gap_voffset = flags & MOZ_GTK_TAB_MARGIN_MASK; + if (gap_voffset > gap_height) gap_voffset = gap_height; + + /* Set gap_{l,r}_offset to appropriate values */ + gap_loffset = gap_roffset = 20; /* should be enough */ + if (flags & MOZ_GTK_TAB_FIRST) { + if (direction == GTK_TEXT_DIR_RTL) + gap_roffset = initial_gap; + else + gap_loffset = initial_gap; + } + + GtkStyleContext* panelStyle = + GetStyleContext(MOZ_GTK_TABPANELS, state->image_scale, direction); + + if (isBottomTab) { + /* Draw the tab on bottom */ + focusRect.y += gap_voffset; + focusRect.height -= gap_voffset; + + gtk_render_extension(style, cr, tabRect.x, tabRect.y + gap_voffset, + tabRect.width, tabRect.height - gap_voffset, + GTK_POS_TOP); + + backRect.y += (gap_voffset - gap_height); + backRect.height = gap_height; + + /* Draw the gap; erase with background color before painting in + * case theme does not */ + gtk_render_background(panelStyle, cr, backRect.x, backRect.y, + backRect.width, backRect.height); + cairo_save(cr); + cairo_rectangle(cr, backRect.x, backRect.y, backRect.width, + backRect.height); + cairo_clip(cr); + + gtk_render_frame_gap(panelStyle, cr, tabRect.x - gap_loffset, + tabRect.y + gap_voffset - 3 * gap_height, + tabRect.width + gap_loffset + gap_roffset, + 3 * gap_height, GTK_POS_BOTTOM, gap_loffset, + gap_loffset + tabRect.width); + cairo_restore(cr); + } else { + /* Draw the tab on top */ + focusRect.height -= gap_voffset; + gtk_render_extension(style, cr, tabRect.x, tabRect.y, tabRect.width, + tabRect.height - gap_voffset, GTK_POS_BOTTOM); + + backRect.y += (tabRect.height - gap_voffset); + backRect.height = gap_height; + + /* Draw the gap; erase with background color before painting in + * case theme does not */ + gtk_render_background(panelStyle, cr, backRect.x, backRect.y, + backRect.width, backRect.height); + + cairo_save(cr); + cairo_rectangle(cr, backRect.x, backRect.y, backRect.width, + backRect.height); + cairo_clip(cr); + + gtk_render_frame_gap(panelStyle, cr, tabRect.x - gap_loffset, + tabRect.y + tabRect.height - gap_voffset, + tabRect.width + gap_loffset + gap_roffset, + 3 * gap_height, GTK_POS_TOP, gap_loffset, + gap_loffset + tabRect.width); + cairo_restore(cr); + } + } + } else { + gtk_render_background(style, cr, tabRect.x, tabRect.y, tabRect.width, + tabRect.height); + gtk_render_frame(style, cr, tabRect.x, tabRect.y, tabRect.width, + tabRect.height); + } + + if (state->focused) { + /* Paint the focus ring */ + GtkBorder padding; + gtk_style_context_get_padding(style, GetStateFlagsFromGtkWidgetState(state), + &padding); + + focusRect.x += padding.left; + focusRect.width -= (padding.left + padding.right); + focusRect.y += padding.top; + focusRect.height -= (padding.top + padding.bottom); + + gtk_render_focus(style, cr, focusRect.x, focusRect.y, focusRect.width, + focusRect.height); + } + + return MOZ_GTK_SUCCESS; +} + +/* tab area*/ +static gint moz_gtk_tabpanels_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkTextDirection direction) { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_TABPANELS, state->image_scale, direction); + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + /* + * The gap size is not needed in moz_gtk_tabpanels_paint because + * the gap will be painted with the foreground tab in moz_gtk_tab_paint. + * + * However, if moz_gtk_tabpanels_paint just uses gtk_render_frame(), + * the theme will think that there are no tabs and may draw something + * different.Hence the trick of using two clip regions, and drawing the + * gap outside each clip region, to get the correct frame for + * a tabpanel with tabs. + */ + /* left side */ + cairo_save(cr); + cairo_rectangle(cr, rect->x, rect->y, rect->x + rect->width / 2, + rect->y + rect->height); + cairo_clip(cr); + gtk_render_frame_gap(style, cr, rect->x, rect->y, rect->width, rect->height, + GTK_POS_TOP, rect->width - 1, rect->width); + cairo_restore(cr); + + /* right side */ + cairo_save(cr); + cairo_rectangle(cr, rect->x + rect->width / 2, rect->y, rect->x + rect->width, + rect->y + rect->height); + cairo_clip(cr); + gtk_render_frame_gap(style, cr, rect->x, rect->y, rect->width, rect->height, + GTK_POS_TOP, 0, 1); + cairo_restore(cr); + + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_tab_scroll_arrow_paint(cairo_t* cr, GdkRectangle* rect, + GtkWidgetState* state, + GtkArrowType arrow_type, + GtkTextDirection direction) { + GtkStyleContext* style; + gdouble arrow_angle; + gint arrow_size = MIN(rect->width, rect->height); + gint x = rect->x + (rect->width - arrow_size) / 2; + gint y = rect->y + (rect->height - arrow_size) / 2; + + if (direction == GTK_TEXT_DIR_RTL) { + arrow_type = + (arrow_type == GTK_ARROW_LEFT) ? GTK_ARROW_RIGHT : GTK_ARROW_LEFT; + } + switch (arrow_type) { + case GTK_ARROW_LEFT: + arrow_angle = ARROW_LEFT; + break; + case GTK_ARROW_RIGHT: + arrow_angle = ARROW_RIGHT; + break; + case GTK_ARROW_DOWN: + arrow_angle = ARROW_DOWN; + break; + default: + arrow_angle = ARROW_UP; + break; + } + if (arrow_type != GTK_ARROW_NONE) { + style = GetStyleContext(MOZ_GTK_TAB_SCROLLARROW, state->image_scale, + direction, GetStateFlagsFromGtkWidgetState(state)); + gtk_render_arrow(style, cr, arrow_angle, x, y, arrow_size); + } + return MOZ_GTK_SUCCESS; +} + +static gint moz_gtk_header_bar_paint(WidgetNodeType widgetType, cairo_t* cr, + GdkRectangle* rect, + GtkWidgetState* state) { + GtkStateFlags state_flags = GetStateFlagsFromGtkWidgetState(state); + GtkStyleContext* style = GetStyleContext(widgetType, state->image_scale, + GTK_TEXT_DIR_NONE, state_flags); + + // Some themes like Elementary's style the container of the headerbar rather + // than the header bar itself. + if (HeaderBarShouldDrawContainer(widgetType)) { + auto containerType = widgetType == MOZ_GTK_HEADER_BAR + ? MOZ_GTK_HEADERBAR_FIXED + : MOZ_GTK_HEADERBAR_FIXED_MAXIMIZED; + style = GetStyleContext(containerType, state->image_scale, + GTK_TEXT_DIR_NONE, state_flags); + } + + gtk_render_background(style, cr, rect->x, rect->y, rect->width, rect->height); + gtk_render_frame(style, cr, rect->x, rect->y, rect->width, rect->height); + + return MOZ_GTK_SUCCESS; +} + +gint moz_gtk_get_widget_border(WidgetNodeType widget, gint* left, gint* top, + gint* right, gint* bottom, + // NOTE: callers depend on direction being used + // only for MOZ_GTK_DROPDOWN widgets. + GtkTextDirection direction) { + GtkWidget* w; + GtkStyleContext* style; + *left = *top = *right = *bottom = 0; + + switch (widget) { + case MOZ_GTK_BUTTON: + case MOZ_GTK_TOOLBAR_BUTTON: { + style = GetStyleContext(MOZ_GTK_BUTTON); + + *left = *top = *right = *bottom = gtk_container_get_border_width( + GTK_CONTAINER(GetWidget(MOZ_GTK_BUTTON))); + + if (widget == MOZ_GTK_TOOLBAR_BUTTON) { + gtk_style_context_save(style); + gtk_style_context_add_class(style, "image-button"); + } + + moz_gtk_add_style_padding(style, left, top, right, bottom); + + if (widget == MOZ_GTK_TOOLBAR_BUTTON) gtk_style_context_restore(style); + + moz_gtk_add_style_border(style, left, top, right, bottom); + + return MOZ_GTK_SUCCESS; + } + case MOZ_GTK_ENTRY: + case MOZ_GTK_DROPDOWN_ENTRY: { + style = GetStyleContext(widget); + + // XXX: Subtract 1 pixel from the padding to account for the default + // padding in forms.css. See bug 1187385. + *left = *top = *right = *bottom = -1; + moz_gtk_add_border_padding(style, left, top, right, bottom); + + return MOZ_GTK_SUCCESS; + } + case MOZ_GTK_TEXT_VIEW: + case MOZ_GTK_TREEVIEW: { + style = GetStyleContext(MOZ_GTK_SCROLLED_WINDOW); + moz_gtk_add_style_border(style, left, top, right, bottom); + return MOZ_GTK_SUCCESS; + } + case MOZ_GTK_TREE_HEADER_CELL: { + /* A Tree Header in GTK is just a different styled button + * It must be placed in a TreeView for getting the correct style + * assigned. + * That is why the following code is the same as for MOZ_GTK_BUTTON. + * */ + *left = *top = *right = *bottom = gtk_container_get_border_width( + GTK_CONTAINER(GetWidget(MOZ_GTK_TREE_HEADER_CELL))); + style = GetStyleContext(MOZ_GTK_TREE_HEADER_CELL); + moz_gtk_add_border_padding(style, left, top, right, bottom); + return MOZ_GTK_SUCCESS; + } + case MOZ_GTK_DROPDOWN: { + /* We need to account for the arrow on the dropdown, so text + * doesn't come too close to the arrow, or in some cases spill + * into the arrow. */ + gboolean wide_separators; + gint separator_width; + GtkRequisition arrow_req; + GtkBorder border; + + *left = *top = *right = *bottom = gtk_container_get_border_width( + GTK_CONTAINER(GetWidget(MOZ_GTK_COMBOBOX_BUTTON))); + style = GetStyleContext(MOZ_GTK_COMBOBOX_BUTTON); + moz_gtk_add_border_padding(style, left, top, right, bottom); + + /* If there is no separator, don't try to count its width. */ + separator_width = 0; + GtkWidget* comboBoxSeparator = GetWidget(MOZ_GTK_COMBOBOX_SEPARATOR); + if (comboBoxSeparator) { + style = gtk_widget_get_style_context(comboBoxSeparator); + gtk_style_context_get_style(style, "wide-separators", &wide_separators, + "separator-width", &separator_width, NULL); + + if (!wide_separators) { + gtk_style_context_get_border( + style, gtk_style_context_get_state(style), &border); + separator_width = border.left; + } + } + + gtk_widget_get_preferred_size(GetWidget(MOZ_GTK_COMBOBOX_ARROW), NULL, + &arrow_req); + moz_gtk_sanity_preferred_size(&arrow_req); + + if (direction == GTK_TEXT_DIR_RTL) + *left += separator_width + arrow_req.width; + else + *right += separator_width + arrow_req.width; + + return MOZ_GTK_SUCCESS; + } + case MOZ_GTK_TABPANELS: + w = GetWidget(MOZ_GTK_TABPANELS); + break; + case MOZ_GTK_PROGRESSBAR: + w = GetWidget(MOZ_GTK_PROGRESSBAR); + break; + case MOZ_GTK_SPINBUTTON_ENTRY: + case MOZ_GTK_SPINBUTTON_UP: + case MOZ_GTK_SPINBUTTON_DOWN: + w = GetWidget(MOZ_GTK_SPINBUTTON); + break; + case MOZ_GTK_SCALE_HORIZONTAL: + case MOZ_GTK_SCALE_VERTICAL: + w = GetWidget(widget); + break; + case MOZ_GTK_FRAME: + w = GetWidget(MOZ_GTK_FRAME); + break; + case MOZ_GTK_TOOLTIP: { + // In GTK 3 there are 6 pixels of additional margin around the box. + // See details there: + // https://github.com/GNOME/gtk/blob/5ea69a136bd7e4970b3a800390e20314665aaed2/gtk/ui/gtktooltipwindow.ui#L11 + *left = *right = *top = *bottom = 6; + + // We also need to add margin/padding/borders from Tooltip content. + // Tooltip contains horizontal box, where icon and label is put. + // We ignore icon as long as we don't have support for it. + GtkStyleContext* boxStyle = GetStyleContext(MOZ_GTK_TOOLTIP_BOX); + moz_gtk_add_margin_border_padding(boxStyle, left, top, right, bottom); + + GtkStyleContext* labelStyle = GetStyleContext(MOZ_GTK_TOOLTIP_BOX_LABEL); + moz_gtk_add_margin_border_padding(labelStyle, left, top, right, bottom); + + return MOZ_GTK_SUCCESS; + } + case MOZ_GTK_HEADER_BAR_BUTTON_BOX: { + style = GetStyleContext(MOZ_GTK_HEADER_BAR); + moz_gtk_add_border_padding(style, left, top, right, bottom); + *top = *bottom = 0; + bool leftButtonsPlacement = false; + GetGtkHeaderBarButtonLayout({}, &leftButtonsPlacement); + if (direction == GTK_TEXT_DIR_RTL) { + leftButtonsPlacement = !leftButtonsPlacement; + } + if (leftButtonsPlacement) { + *right = 0; + } else { + *left = 0; + } + return MOZ_GTK_SUCCESS; + } + /* These widgets have no borders, since they are not containers. */ + case MOZ_GTK_SPLITTER_HORIZONTAL: + case MOZ_GTK_SPLITTER_VERTICAL: + case MOZ_GTK_CHECKBUTTON: + case MOZ_GTK_RADIOBUTTON: + case MOZ_GTK_SCALE_THUMB_HORIZONTAL: + case MOZ_GTK_SCALE_THUMB_VERTICAL: + case MOZ_GTK_PROGRESS_CHUNK: + case MOZ_GTK_PROGRESS_CHUNK_INDETERMINATE: + case MOZ_GTK_PROGRESS_CHUNK_VERTICAL_INDETERMINATE: + case MOZ_GTK_TREEVIEW_EXPANDER: + case MOZ_GTK_HEADER_BAR: + case MOZ_GTK_HEADER_BAR_MAXIMIZED: + case MOZ_GTK_HEADER_BAR_BUTTON_CLOSE: + case MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE: + case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE: + case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE: + /* These widgets have no borders.*/ + case MOZ_GTK_INNER_SPIN_BUTTON: + case MOZ_GTK_SPINBUTTON: + case MOZ_GTK_WINDOW_DECORATION: + case MOZ_GTK_WINDOW_DECORATION_SOLID: + case MOZ_GTK_RESIZER: + case MOZ_GTK_TOOLBARBUTTON_ARROW: + case MOZ_GTK_TAB_SCROLLARROW: + return MOZ_GTK_SUCCESS; + default: + g_warning("Unsupported widget type: %d", widget); + return MOZ_GTK_UNKNOWN_WIDGET; + } + /* TODO - we're still missing some widget implementations */ + if (w) { + moz_gtk_add_style_border(gtk_widget_get_style_context(w), left, top, right, + bottom); + } + return MOZ_GTK_SUCCESS; +} + +gint moz_gtk_get_tab_border(gint* left, gint* top, gint* right, gint* bottom, + GtkTextDirection direction, GtkTabFlags flags, + WidgetNodeType widget) { + GtkStyleContext* style = GetStyleContext(widget, 1, direction, + GetStateFlagsFromGtkTabFlags(flags)); + + *left = *top = *right = *bottom = 0; + moz_gtk_add_style_padding(style, left, top, right, bottom); + + // Gtk >= 3.20 does not use those styles + if (gtk_check_version(3, 20, 0) != nullptr) { + int tab_curvature; + + gtk_style_context_get_style(style, "tab-curvature", &tab_curvature, NULL); + *left += tab_curvature; + *right += tab_curvature; + + if (flags & MOZ_GTK_TAB_FIRST) { + int initial_gap = 0; + gtk_style_context_get_style(style, "initial-gap", &initial_gap, NULL); + if (direction == GTK_TEXT_DIR_RTL) + *right += initial_gap; + else + *left += initial_gap; + } + } else { + GtkBorder margin; + + gtk_style_context_get_margin(style, gtk_style_context_get_state(style), + &margin); + *left += margin.left; + *right += margin.right; + + if (flags & MOZ_GTK_TAB_FIRST) { + style = GetStyleContext(MOZ_GTK_NOTEBOOK_HEADER, direction); + gtk_style_context_get_margin(style, gtk_style_context_get_state(style), + &margin); + *left += margin.left; + *right += margin.right; + } + } + + return MOZ_GTK_SUCCESS; +} + +gint moz_gtk_get_tab_scroll_arrow_size(gint* width, gint* height) { + gint arrow_size; + + GtkStyleContext* style = GetStyleContext(MOZ_GTK_TABPANELS); + gtk_style_context_get_style(style, "scroll-arrow-hlength", &arrow_size, NULL); + + *height = *width = arrow_size; + + return MOZ_GTK_SUCCESS; +} + +void moz_gtk_get_arrow_size(WidgetNodeType widgetType, gint* width, + gint* height) { + GtkWidget* widget; + switch (widgetType) { + case MOZ_GTK_DROPDOWN: + widget = GetWidget(MOZ_GTK_COMBOBOX_ARROW); + break; + default: + widget = GetWidget(MOZ_GTK_BUTTON_ARROW); + break; + } + if (widget) { + GtkRequisition requisition; + gtk_widget_get_preferred_size(widget, NULL, &requisition); + moz_gtk_sanity_preferred_size(&requisition); + + *width = requisition.width; + *height = requisition.height; + } else { + *width = 0; + *height = 0; + } +} + +gint moz_gtk_get_expander_size(gint* size) { + GtkStyleContext* style = GetStyleContext(MOZ_GTK_EXPANDER); + gtk_style_context_get_style(style, "expander-size", size, NULL); + return MOZ_GTK_SUCCESS; +} + +gint moz_gtk_get_treeview_expander_size(gint* size) { + GtkStyleContext* style = GetStyleContext(MOZ_GTK_TREEVIEW); + gtk_style_context_get_style(style, "expander-size", size, NULL); + return MOZ_GTK_SUCCESS; +} + +void moz_gtk_get_entry_min_height(gint* min_content_height, + gint* border_padding_height) { + GtkStyleContext* style = GetStyleContext(MOZ_GTK_ENTRY); + if (!gtk_check_version(3, 20, 0)) { + gtk_style_context_get(style, gtk_style_context_get_state(style), + "min-height", min_content_height, nullptr); + } else { + *min_content_height = 0; + } + + GtkBorder border; + GtkBorder padding; + gtk_style_context_get_border(style, gtk_style_context_get_state(style), + &border); + gtk_style_context_get_padding(style, gtk_style_context_get_state(style), + &padding); + + *border_padding_height = + (border.top + border.bottom + padding.top + padding.bottom); +} + +void moz_gtk_get_scale_metrics(GtkOrientation orient, gint* scale_width, + gint* scale_height) { + if (gtk_check_version(3, 20, 0) != nullptr) { + WidgetNodeType widget = (orient == GTK_ORIENTATION_HORIZONTAL) + ? MOZ_GTK_SCALE_HORIZONTAL + : MOZ_GTK_SCALE_VERTICAL; + + gint thumb_length, thumb_height, trough_border; + moz_gtk_get_scalethumb_metrics(orient, &thumb_length, &thumb_height); + + GtkStyleContext* style = GetStyleContext(widget); + gtk_style_context_get_style(style, "trough-border", &trough_border, NULL); + + if (orient == GTK_ORIENTATION_HORIZONTAL) { + *scale_width = thumb_length + trough_border * 2; + *scale_height = thumb_height + trough_border * 2; + } else { + *scale_width = thumb_height + trough_border * 2; + *scale_height = thumb_length + trough_border * 2; + } + } else { + WidgetNodeType widget = (orient == GTK_ORIENTATION_HORIZONTAL) + ? MOZ_GTK_SCALE_TROUGH_HORIZONTAL + : MOZ_GTK_SCALE_TROUGH_VERTICAL; + moz_gtk_get_widget_min_size(GetStyleContext(widget), scale_width, + scale_height); + } +} + +gint moz_gtk_get_scalethumb_metrics(GtkOrientation orient, gint* thumb_length, + gint* thumb_height) { + if (gtk_check_version(3, 20, 0) != nullptr) { + WidgetNodeType widget = (orient == GTK_ORIENTATION_HORIZONTAL) + ? MOZ_GTK_SCALE_HORIZONTAL + : MOZ_GTK_SCALE_VERTICAL; + GtkStyleContext* style = GetStyleContext(widget); + gtk_style_context_get_style(style, "slider_length", thumb_length, + "slider_width", thumb_height, NULL); + } else { + WidgetNodeType widget = (orient == GTK_ORIENTATION_HORIZONTAL) + ? MOZ_GTK_SCALE_THUMB_HORIZONTAL + : MOZ_GTK_SCALE_THUMB_VERTICAL; + GtkStyleContext* style = GetStyleContext(widget); + + gint min_width, min_height; + GtkStateFlags state = gtk_style_context_get_state(style); + gtk_style_context_get(style, state, "min-width", &min_width, "min-height", + &min_height, nullptr); + GtkBorder margin; + gtk_style_context_get_margin(style, state, &margin); + gint margin_width = margin.left + margin.right; + gint margin_height = margin.top + margin.bottom; + + // Negative margin of slider element also determines its minimal size + // so use bigger of those two values. + if (min_width < -margin_width) min_width = -margin_width; + if (min_height < -margin_height) min_height = -margin_height; + + *thumb_length = min_width; + *thumb_height = min_height; + } + + return MOZ_GTK_SUCCESS; +} + +const ToggleGTKMetrics* GetToggleMetrics(WidgetNodeType aWidgetType) { + ToggleGTKMetrics* metrics; + + switch (aWidgetType) { + case MOZ_GTK_RADIOBUTTON: + metrics = &sRadioMetrics; + break; + case MOZ_GTK_CHECKBUTTON: + metrics = &sCheckboxMetrics; + break; + default: + MOZ_CRASH("Unsupported widget type for getting metrics"); + return nullptr; + } + + metrics->initialized = true; + if (gtk_check_version(3, 20, 0) == nullptr) { + GtkStyleContext* style = GetStyleContext(aWidgetType); + GtkStateFlags state_flags = gtk_style_context_get_state(style); + gtk_style_context_get(style, state_flags, "min-height", + &(metrics->minSizeWithBorder.height), "min-width", + &(metrics->minSizeWithBorder.width), nullptr); + // Fallback to indicator size if min dimensions are zero + if (metrics->minSizeWithBorder.height == 0 || + metrics->minSizeWithBorder.width == 0) { + gint indicator_size = 0; + gtk_widget_style_get(GetWidget(MOZ_GTK_CHECKBUTTON_CONTAINER), + "indicator_size", &indicator_size, nullptr); + if (metrics->minSizeWithBorder.height == 0) { + metrics->minSizeWithBorder.height = indicator_size; + } + if (metrics->minSizeWithBorder.width == 0) { + metrics->minSizeWithBorder.width = indicator_size; + } + } + + GtkBorder border, padding; + gtk_style_context_get_border(style, state_flags, &border); + gtk_style_context_get_padding(style, state_flags, &padding); + metrics->borderAndPadding.left = border.left + padding.left; + metrics->borderAndPadding.right = border.right + padding.right; + metrics->borderAndPadding.top = border.top + padding.top; + metrics->borderAndPadding.bottom = border.bottom + padding.bottom; + metrics->minSizeWithBorder.width += + metrics->borderAndPadding.left + metrics->borderAndPadding.right; + metrics->minSizeWithBorder.height += + metrics->borderAndPadding.top + metrics->borderAndPadding.bottom; + } else { + gint indicator_size = 0, indicator_spacing = 0; + gtk_widget_style_get(GetWidget(MOZ_GTK_CHECKBUTTON_CONTAINER), + "indicator_size", &indicator_size, "indicator_spacing", + &indicator_spacing, nullptr); + metrics->minSizeWithBorder.width = metrics->minSizeWithBorder.height = + indicator_size; + } + return metrics; +} + +/* + * get_shadow_width() from gtkwindow.c is not public so we need + * to implement it. + */ +void InitWindowDecorationSize(CSDWindowDecorationSize* sWindowDecorationSize, + bool aPopupWindow) { + bool solidDecorations = gtk_style_context_has_class( + GetStyleContext(MOZ_GTK_HEADERBAR_WINDOW, 1), "solid-csd"); + // solid-csd does not use frame extents, quit now. + if (solidDecorations) { + sWindowDecorationSize->decorationSize = {0, 0, 0, 0}; + return; + } + + // Scale factor is applied later when decoration size is used for actual + // gtk windows. + GtkStyleContext* context = GetStyleContext(MOZ_GTK_WINDOW_DECORATION); + + /* Always sum border + padding */ + GtkBorder padding; + GtkStateFlags state = gtk_style_context_get_state(context); + gtk_style_context_get_border(context, state, + &sWindowDecorationSize->decorationSize); + gtk_style_context_get_padding(context, state, &padding); + sWindowDecorationSize->decorationSize += padding; + + // Available on GTK 3.20+. + static auto sGtkRenderBackgroundGetClip = (void (*)( + GtkStyleContext*, gdouble, gdouble, gdouble, gdouble, + GdkRectangle*))dlsym(RTLD_DEFAULT, "gtk_render_background_get_clip"); + + if (!sGtkRenderBackgroundGetClip) { + return; + } + + GdkRectangle clip; + sGtkRenderBackgroundGetClip(context, 0, 0, 0, 0, &clip); + + GtkBorder extents; + extents.top = -clip.y; + extents.right = clip.width + clip.x; + extents.bottom = clip.height + clip.y; + extents.left = -clip.x; + + // Get shadow extents but combine with style margin; use the bigger value. + // Margin is used for resize grip size - it's not present on + // popup windows. + if (!aPopupWindow) { + GtkBorder margin; + gtk_style_context_get_margin(context, state, &margin); + + extents.top = MAX(extents.top, margin.top); + extents.right = MAX(extents.right, margin.right); + extents.bottom = MAX(extents.bottom, margin.bottom); + extents.left = MAX(extents.left, margin.left); + } + + sWindowDecorationSize->decorationSize += extents; +} + +GtkBorder GetCSDDecorationSize(bool aIsPopup) { + auto metrics = + aIsPopup ? &sPopupWindowDecorationSize : &sToplevelWindowDecorationSize; + if (!metrics->initialized) { + InitWindowDecorationSize(metrics, aIsPopup); + metrics->initialized = true; + } + return metrics->decorationSize; +} + +/* cairo_t *cr argument has to be a system-cairo. */ +gint moz_gtk_widget_paint(WidgetNodeType widget, cairo_t* cr, + GdkRectangle* rect, GtkWidgetState* state, gint flags, + GtkTextDirection direction) { + /* A workaround for https://bugzilla.gnome.org/show_bug.cgi?id=694086 + */ + cairo_new_path(cr); + + switch (widget) { + case MOZ_GTK_BUTTON: + case MOZ_GTK_TOOLBAR_BUTTON: + if (state->depressed) { + return moz_gtk_button_paint(cr, rect, state, (GtkReliefStyle)flags, + GetWidget(MOZ_GTK_TOGGLE_BUTTON), + direction); + } + return moz_gtk_button_paint(cr, rect, state, (GtkReliefStyle)flags, + GetWidget(MOZ_GTK_BUTTON), direction); + case MOZ_GTK_HEADER_BAR_BUTTON_CLOSE: + case MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE: + case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE: + case MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE: + return moz_gtk_header_bar_button_paint( + cr, rect, state, (GtkReliefStyle)flags, widget, direction); + case MOZ_GTK_CHECKBUTTON: + case MOZ_GTK_RADIOBUTTON: + return moz_gtk_toggle_paint(cr, rect, state, + !!(flags & MOZ_GTK_WIDGET_CHECKED), + !!(flags & MOZ_GTK_WIDGET_INCONSISTENT), + (widget == MOZ_GTK_RADIOBUTTON), direction); + case MOZ_GTK_SCALE_HORIZONTAL: + case MOZ_GTK_SCALE_VERTICAL: + return moz_gtk_scale_paint(cr, rect, state, (GtkOrientation)flags, + direction); + case MOZ_GTK_SCALE_THUMB_HORIZONTAL: + case MOZ_GTK_SCALE_THUMB_VERTICAL: + return moz_gtk_scale_thumb_paint(cr, rect, state, (GtkOrientation)flags, + direction); + case MOZ_GTK_INNER_SPIN_BUTTON: + return moz_gtk_inner_spin_paint(cr, rect, state, direction); + case MOZ_GTK_SPINBUTTON: + return moz_gtk_spin_paint(cr, rect, state, direction); + case MOZ_GTK_SPINBUTTON_UP: + case MOZ_GTK_SPINBUTTON_DOWN: + return moz_gtk_spin_updown_paint( + cr, rect, (widget == MOZ_GTK_SPINBUTTON_DOWN), state, direction); + case MOZ_GTK_SPINBUTTON_ENTRY: { + GtkStyleContext* style = + GetStyleContext(MOZ_GTK_SPINBUTTON_ENTRY, state->image_scale, + direction, GetStateFlagsFromGtkWidgetState(state)); + return moz_gtk_entry_paint(cr, rect, state, style, widget); + } + case MOZ_GTK_TREEVIEW: + return moz_gtk_treeview_paint(cr, rect, state, direction); + case MOZ_GTK_TREE_HEADER_CELL: + return moz_gtk_tree_header_cell_paint(cr, rect, state, flags, direction); + case MOZ_GTK_TREEVIEW_EXPANDER: + return moz_gtk_treeview_expander_paint( + cr, rect, state, (GtkExpanderStyle)flags, direction); + case MOZ_GTK_ENTRY: + case MOZ_GTK_DROPDOWN_ENTRY: { + GtkStyleContext* style = + GetStyleContext(widget, state->image_scale, direction, + GetStateFlagsFromGtkWidgetState(state)); + gint ret = moz_gtk_entry_paint(cr, rect, state, style, widget); + return ret; + } + case MOZ_GTK_TEXT_VIEW: + return moz_gtk_text_view_paint(cr, rect, state, direction); + case MOZ_GTK_DROPDOWN: + return moz_gtk_combo_box_paint(cr, rect, state, direction); + case MOZ_GTK_TOOLTIP: + return moz_gtk_tooltip_paint(cr, rect, state, direction); + case MOZ_GTK_FRAME: + return moz_gtk_frame_paint(cr, rect, state, direction); + case MOZ_GTK_RESIZER: + return moz_gtk_resizer_paint(cr, rect, state, direction); + case MOZ_GTK_PROGRESSBAR: + return moz_gtk_progressbar_paint(cr, rect, state, direction); + case MOZ_GTK_PROGRESS_CHUNK: + case MOZ_GTK_PROGRESS_CHUNK_INDETERMINATE: + case MOZ_GTK_PROGRESS_CHUNK_VERTICAL_INDETERMINATE: + return moz_gtk_progress_chunk_paint(cr, rect, state, direction, widget); + case MOZ_GTK_TAB_TOP: + case MOZ_GTK_TAB_BOTTOM: + return moz_gtk_tab_paint(cr, rect, state, (GtkTabFlags)flags, direction, + widget); + case MOZ_GTK_TABPANELS: + return moz_gtk_tabpanels_paint(cr, rect, state, direction); + case MOZ_GTK_TAB_SCROLLARROW: + return moz_gtk_tab_scroll_arrow_paint(cr, rect, state, + (GtkArrowType)flags, direction); + case MOZ_GTK_TOOLBARBUTTON_ARROW: + return moz_gtk_arrow_paint(cr, rect, state, (GtkArrowType)flags, + direction); + case MOZ_GTK_SPLITTER_HORIZONTAL: + return moz_gtk_vpaned_paint(cr, rect, state); + case MOZ_GTK_SPLITTER_VERTICAL: + return moz_gtk_hpaned_paint(cr, rect, state); + case MOZ_GTK_WINDOW_DECORATION: + return moz_gtk_window_decoration_paint(cr, rect, state, direction); + case MOZ_GTK_HEADER_BAR: + case MOZ_GTK_HEADER_BAR_MAXIMIZED: + return moz_gtk_header_bar_paint(widget, cr, rect, state); + default: + g_warning("Unknown widget type: %d", widget); + } + + return MOZ_GTK_UNKNOWN_WIDGET; +} + +gint moz_gtk_shutdown() { + /* This will destroy all of our widgets */ + ResetWidgetCache(); + + return MOZ_GTK_SUCCESS; +} |