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Diffstat (limited to 'widget/gtk/gtkdrawing.h')
| -rw-r--r-- | widget/gtk/gtkdrawing.h | 524 |
1 files changed, 524 insertions, 0 deletions
diff --git a/widget/gtk/gtkdrawing.h b/widget/gtk/gtkdrawing.h new file mode 100644 index 0000000000..e751dc38c9 --- /dev/null +++ b/widget/gtk/gtkdrawing.h @@ -0,0 +1,524 @@ +/* -*- Mode: C; tab-width: 2; 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/. */ + +/** + * gtkdrawing.h: GTK widget rendering utilities + * + * gtkdrawing provides an API for rendering GTK widgets in the + * current theme to a pixmap or window, without requiring an actual + * widget instantiation, similar to the Macintosh Appearance Manager + * or Windows XP's DrawThemeBackground() API. + */ + +#ifndef _GTK_DRAWING_H_ +#define _GTK_DRAWING_H_ + +#include <gdk/gdk.h> +#include <gtk/gtk.h> +#include <algorithm> +#include "mozilla/Span.h" + +/*** type definitions ***/ +typedef struct { + guint8 active; + guint8 focused; + guint8 selected; + guint8 inHover; + guint8 disabled; + guint8 isDefault; + guint8 canDefault; + /* The depressed state is for buttons which remain active for a longer period: + * activated toggle buttons or buttons showing a popup menu. */ + guint8 depressed; + guint8 backdrop; + gint32 curpos; /* curpos and maxpos are used for scrollbars */ + gint32 maxpos; + gint32 image_scale; /* image scale */ +} GtkWidgetState; + +/** + * A size in the same GTK pixel units as GtkBorder and GdkRectangle. + */ +struct MozGtkSize { + gint width; + gint height; + + MozGtkSize& operator+=(const GtkBorder& aBorder) { + width += aBorder.left + aBorder.right; + height += aBorder.top + aBorder.bottom; + return *this; + } + MozGtkSize operator+(const GtkBorder& aBorder) const { + MozGtkSize result = *this; + return result += aBorder; + } + bool operator<(const MozGtkSize& aOther) const { + return (width < aOther.width && height <= aOther.height) || + (width <= aOther.width && height < aOther.height); + } + void Include(MozGtkSize aOther) { + width = std::max(width, aOther.width); + height = std::max(height, aOther.height); + } + void Rotate() { + gint tmp = width; + width = height; + height = tmp; + } +}; + +typedef struct { + bool initialized; + MozGtkSize minSizeWithBorder; + GtkBorder borderAndPadding; +} ToggleGTKMetrics; + +typedef struct { + MozGtkSize minSizeWithBorderMargin; + GtkBorder buttonMargin; + gint iconXPosition; + gint iconYPosition; + bool visible; + bool firstButton; + bool lastButton; +} ToolbarButtonGTKMetrics; + +#define TOOLBAR_BUTTONS 3 +typedef struct { + bool initialized; + ToolbarButtonGTKMetrics button[TOOLBAR_BUTTONS]; +} ToolbarGTKMetrics; + +typedef struct { + bool initialized; + GtkBorder decorationSize; +} CSDWindowDecorationSize; + +/** flags for tab state **/ +typedef enum { + /* first eight bits are used to pass a margin */ + MOZ_GTK_TAB_MARGIN_MASK = 0xFF, + /* the first tab in the group */ + MOZ_GTK_TAB_FIRST = 1 << 9, + /* the selected tab */ + MOZ_GTK_TAB_SELECTED = 1 << 10 +} GtkTabFlags; + +/*** result/error codes ***/ +#define MOZ_GTK_SUCCESS 0 +#define MOZ_GTK_UNKNOWN_WIDGET -1 +#define MOZ_GTK_UNSAFE_THEME -2 + +/*** checkbox/radio flags ***/ +#define MOZ_GTK_WIDGET_CHECKED 1 +#define MOZ_GTK_WIDGET_INCONSISTENT (1 << 1) + +/*** widget type constants ***/ +enum WidgetNodeType : int { + /* Paints a GtkButton. flags is a GtkReliefStyle. */ + MOZ_GTK_BUTTON, + /* Paints a button with image and no text */ + MOZ_GTK_TOOLBAR_BUTTON, + /* Paints a toggle button */ + MOZ_GTK_TOGGLE_BUTTON, + /* Paints a button arrow */ + MOZ_GTK_BUTTON_ARROW, + + /* Paints the container part of a GtkCheckButton. */ + MOZ_GTK_CHECKBUTTON_CONTAINER, + /* Paints a GtkCheckButton. flags is a boolean, 1=checked, 0=not checked. */ + MOZ_GTK_CHECKBUTTON, + + /* Paints the container part of a GtkRadioButton. */ + MOZ_GTK_RADIOBUTTON_CONTAINER, + /* Paints a GtkRadioButton. flags is a boolean, 1=checked, 0=not checked. */ + MOZ_GTK_RADIOBUTTON, + /* Vertical GtkScrollbar counterparts */ + MOZ_GTK_SCROLLBAR_VERTICAL, + MOZ_GTK_SCROLLBAR_CONTENTS_VERTICAL, + MOZ_GTK_SCROLLBAR_TROUGH_VERTICAL, + MOZ_GTK_SCROLLBAR_THUMB_VERTICAL, + + /* Paints a GtkScale. */ + MOZ_GTK_SCALE_HORIZONTAL, + MOZ_GTK_SCALE_VERTICAL, + /* Paints a GtkScale trough. */ + MOZ_GTK_SCALE_CONTENTS_HORIZONTAL, + MOZ_GTK_SCALE_CONTENTS_VERTICAL, + MOZ_GTK_SCALE_TROUGH_HORIZONTAL, + MOZ_GTK_SCALE_TROUGH_VERTICAL, + /* Paints a GtkScale thumb. */ + MOZ_GTK_SCALE_THUMB_HORIZONTAL, + MOZ_GTK_SCALE_THUMB_VERTICAL, + /* Paints a GtkSpinButton */ + MOZ_GTK_INNER_SPIN_BUTTON, + MOZ_GTK_SPINBUTTON, + MOZ_GTK_SPINBUTTON_UP, + MOZ_GTK_SPINBUTTON_DOWN, + MOZ_GTK_SPINBUTTON_ENTRY, + /* Paints a GtkEntry. */ + MOZ_GTK_ENTRY, + /* Paints a GtkExpander. */ + MOZ_GTK_EXPANDER, + /* Paints a GtkTextView or gets the style context corresponding to the + root node of a GtkTextView. */ + MOZ_GTK_TEXT_VIEW, + /* The "text" window or node of a GtkTextView */ + MOZ_GTK_TEXT_VIEW_TEXT, + /* The "selection" node of a GtkTextView.text */ + MOZ_GTK_TEXT_VIEW_TEXT_SELECTION, + /* Paints a GtkOptionMenu. */ + MOZ_GTK_DROPDOWN, + /* Paints an entry in an editable option menu */ + MOZ_GTK_DROPDOWN_ENTRY, + + /* Paints a GtkToolTip */ + MOZ_GTK_TOOLTIP, + /* Paints a GtkBox from GtkToolTip */ + MOZ_GTK_TOOLTIP_BOX, + /* Paints a GtkLabel of GtkToolTip */ + MOZ_GTK_TOOLTIP_BOX_LABEL, + /* Paints a GtkFrame (e.g. a status bar panel). */ + MOZ_GTK_FRAME, + /* Paints the border of a GtkFrame */ + MOZ_GTK_FRAME_BORDER, + /* Paints a resize grip for a GtkTextView */ + MOZ_GTK_RESIZER, + /* Paints a GtkProgressBar. */ + MOZ_GTK_PROGRESSBAR, + /* Paints a trough (track) of a GtkProgressBar */ + MOZ_GTK_PROGRESS_TROUGH, + /* Paints a progress chunk of a GtkProgressBar. */ + MOZ_GTK_PROGRESS_CHUNK, + /* Paints a progress chunk of an indeterminated GtkProgressBar. */ + MOZ_GTK_PROGRESS_CHUNK_INDETERMINATE, + /* Paints a progress chunk of a vertical indeterminated GtkProgressBar. */ + MOZ_GTK_PROGRESS_CHUNK_VERTICAL_INDETERMINATE, + /* Used as root style of whole GtkNotebook widget */ + MOZ_GTK_NOTEBOOK, + /* Used as root style of active GtkNotebook area which contains tabs and + arrows. */ + MOZ_GTK_NOTEBOOK_HEADER, + /* Paints a tab of a GtkNotebook. flags is a GtkTabFlags, defined above. */ + MOZ_GTK_TAB_TOP, + /* Paints a tab of a GtkNotebook. flags is a GtkTabFlags, defined above. */ + MOZ_GTK_TAB_BOTTOM, + /* Paints the background and border of a GtkNotebook. */ + MOZ_GTK_TABPANELS, + /* Paints a GtkArrow for a GtkNotebook. flags is a GtkArrowType. */ + MOZ_GTK_TAB_SCROLLARROW, + /* Paints the expander and border of a GtkTreeView */ + MOZ_GTK_TREEVIEW, + /* Paints the border of a GtkTreeView */ + MOZ_GTK_TREEVIEW_VIEW, + /* Paints treeheader cells */ + MOZ_GTK_TREE_HEADER_CELL, + /* Paints an expander for a GtkTreeView */ + MOZ_GTK_TREEVIEW_EXPANDER, + /* Paints the background of menus, context menus. */ + MOZ_GTK_MENUPOPUP, + /* Menubar for -moz-headerbar colors */ + MOZ_GTK_MENUBAR, + /* Paints an arrow in a toolbar button. flags is a GtkArrowType. */ + MOZ_GTK_TOOLBARBUTTON_ARROW, + /* Paints items of popup menus. */ + MOZ_GTK_MENUITEM, + /* Menubar menuitem for foreground colors. */ + MOZ_GTK_MENUBARITEM, + /* GtkVPaned base class */ + MOZ_GTK_SPLITTER_HORIZONTAL, + /* GtkHPaned base class */ + MOZ_GTK_SPLITTER_VERTICAL, + /* Paints a GtkVPaned separator */ + MOZ_GTK_SPLITTER_SEPARATOR_HORIZONTAL, + /* Paints a GtkHPaned separator */ + MOZ_GTK_SPLITTER_SEPARATOR_VERTICAL, + /* Paints the background of a window, dialog or page. */ + MOZ_GTK_WINDOW, + /* Used only as a container for MOZ_GTK_HEADER_BAR. */ + MOZ_GTK_HEADERBAR_WINDOW, + /* Used only as a container for MOZ_GTK_HEADER_BAR_MAXIMIZED. */ + MOZ_GTK_HEADERBAR_WINDOW_MAXIMIZED, + /* Used only as a container for MOZ_GTK_HEADER_BAR. */ + MOZ_GTK_HEADERBAR_FIXED, + /* Used only as a container for MOZ_GTK_HEADER_BAR_MAXIMIZED. */ + MOZ_GTK_HEADERBAR_FIXED_MAXIMIZED, + /* Window container for all widgets */ + MOZ_GTK_WINDOW_CONTAINER, + /* Used for widget tree construction. */ + MOZ_GTK_COMBOBOX, + /* Paints a GtkComboBox button widget. */ + MOZ_GTK_COMBOBOX_BUTTON, + /* Paints a GtkComboBox arrow widget. */ + MOZ_GTK_COMBOBOX_ARROW, + /* Paints a GtkComboBox separator widget. */ + MOZ_GTK_COMBOBOX_SEPARATOR, + /* Used for widget tree construction. */ + MOZ_GTK_COMBOBOX_ENTRY, + /* Paints a GtkComboBox entry widget. */ + MOZ_GTK_COMBOBOX_ENTRY_TEXTAREA, + /* Paints a GtkComboBox entry button widget. */ + MOZ_GTK_COMBOBOX_ENTRY_BUTTON, + /* Paints a GtkComboBox entry arrow widget. */ + MOZ_GTK_COMBOBOX_ENTRY_ARROW, + /* Used for scrolled window shell. */ + MOZ_GTK_SCROLLED_WINDOW, + /* Paints a GtkHeaderBar */ + MOZ_GTK_HEADER_BAR, + /* Paints a GtkHeaderBar in maximized state */ + MOZ_GTK_HEADER_BAR_MAXIMIZED, + /* Container for GtkHeaderBar buttons */ + MOZ_GTK_HEADER_BAR_BUTTON_BOX, + /* Paints GtkHeaderBar title buttons. + * Keep the order here as MOZ_GTK_HEADER_BAR_BUTTON_* are processed + * as an array from MOZ_GTK_HEADER_BAR_BUTTON_CLOSE to the last one. + */ + MOZ_GTK_HEADER_BAR_BUTTON_CLOSE, + MOZ_GTK_HEADER_BAR_BUTTON_MINIMIZE, + MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE, + + /* MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE is a state of + * MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE button and it's used as + * an icon placeholder only. + */ + MOZ_GTK_HEADER_BAR_BUTTON_MAXIMIZE_RESTORE, + + /* Client-side window decoration node. Available on GTK 3.20+. */ + MOZ_GTK_WINDOW_DECORATION, + MOZ_GTK_WINDOW_DECORATION_SOLID, + + MOZ_GTK_WIDGET_NODE_COUNT +}; + +/* ButtonLayout represents a GTK CSD button and whether its on the left or + * right side of the tab bar */ +struct ButtonLayout { + WidgetNodeType mType; +}; + +/*** General library functions ***/ +/** + * Initializes the drawing library. You must call this function + * prior to using any other functionality. + * returns: MOZ_GTK_SUCCESS if there were no errors + * MOZ_GTK_UNSAFE_THEME if the current theme engine is known + * to crash with gtkdrawing. + */ +gint moz_gtk_init(); + +/** + * Updates the drawing library when the theme changes. + */ +void moz_gtk_refresh(); + +/** + * Perform cleanup of the drawing library. You should call this function + * when your program exits, or you no longer need the library. + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_shutdown(); + +/*** Widget drawing ***/ +/** + * Paint a widget in the current theme. + * widget: a constant giving the widget to paint + * drawable: the drawable to paint to; + * it's colormap must be moz_gtk_widget_get_colormap(). + * rect: the bounding rectangle for the widget + * state: the state of the widget. ignored for some widgets. + * flags: widget-dependant flags; see the WidgetNodeType definition. + * direction: the text direction, to draw the widget correctly LTR and RTL. + */ +gint moz_gtk_widget_paint(WidgetNodeType widget, cairo_t* cr, + GdkRectangle* rect, GtkWidgetState* state, gint flags, + GtkTextDirection direction); + +/*** Widget metrics ***/ +/** + * Get the border size of a widget + * left/right: [OUT] the widget's left/right border + * top/bottom: [OUT] the widget's top/bottom border + * direction: the text direction for the widget. Callers depend on this + * being used only for MOZ_GTK_DROPDOWN widgets, and cache + * results for other widget types across direction values. + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_widget_border(WidgetNodeType widget, gint* left, gint* top, + gint* right, gint* bottom, + GtkTextDirection direction); + +/** + * Get the border size of a notebook tab + * left/right: [OUT] the tab's left/right border + * top/bottom: [OUT] the tab's top/bottom border + * direction: the text direction for the widget + * flags: tab-dependant flags; see the GtkTabFlags definition. + * widget: tab widget + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_tab_border(gint* left, gint* top, gint* right, gint* bottom, + GtkTextDirection direction, GtkTabFlags flags, + WidgetNodeType widget); + +/** + * Get the desired size of a GtkCheckButton + * indicator_size: [OUT] the indicator size + * indicator_spacing: [OUT] the spacing between the indicator and its + * container + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_checkbox_get_metrics(gint* indicator_size, + gint* indicator_spacing); + +/** + * Get metrics of the toggle (radio or checkbox) + * isRadio: [IN] true when requesting metrics for the radio button + * returns: pointer to ToggleGTKMetrics struct + */ +const ToggleGTKMetrics* GetToggleMetrics(WidgetNodeType aWidgetType); + +/** + * Get the desired size of a GtkRadioButton + * indicator_size: [OUT] the indicator size + * indicator_spacing: [OUT] the spacing between the indicator and its + * container + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_radio_get_metrics(gint* indicator_size, gint* indicator_spacing); + +/** + * Some GTK themes draw their indication for the default button outside + * the button (e.g. the glow in New Wave). This gets the extra space necessary. + * + * border_top: [OUT] extra space to add above + * border_left: [OUT] extra space to add to the left + * border_bottom: [OUT] extra space to add underneath + * border_right: [OUT] extra space to add to the right + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_button_get_default_overflow(gint* border_top, gint* border_left, + gint* border_bottom, + gint* border_right); + +/** + * Gets the minimum size of a GtkScale. + * orient: [IN] the scale orientation + * scale_width: [OUT] the width of the scale + * scale_height: [OUT] the height of the scale + */ +void moz_gtk_get_scale_metrics(GtkOrientation orient, gint* scale_width, + gint* scale_height); + +/** + * Get the desired size of a GtkScale thumb + * orient: [IN] the scale orientation + * thumb_length: [OUT] the length of the thumb + * thumb_height: [OUT] the height of the thumb + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_scalethumb_metrics(GtkOrientation orient, gint* thumb_length, + gint* thumb_height); + +/** + * Get the desired size of a scroll arrow widget + * width: [OUT] the desired width + * height: [OUT] the desired height + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_tab_scroll_arrow_size(gint* width, gint* height); + +/** + * Get the desired size of an arrow in a button + * + * widgetType: [IN] the widget for which to get the arrow size + * width: [OUT] the desired width + * height: [OUT] the desired height + */ +void moz_gtk_get_arrow_size(WidgetNodeType widgetType, gint* width, + gint* height); + +/** + * Get the minimum height of a entry widget + * min_content_height: [OUT] the minimum height of the content box. + * border_padding_height: [OUT] the size of borders and paddings. + */ +void moz_gtk_get_entry_min_height(gint* min_content_height, + gint* border_padding_height); + +/** + * Get the desired size of a toolbar separator + * size: [OUT] the desired width + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_toolbar_separator_width(gint* size); + +/** + * Get the size of a regular GTK expander that shows/hides content + * size: [OUT] the size of the GTK expander, size = width = height. + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_expander_size(gint* size); + +/** + * Get the size of a treeview's expander (we call them twisties) + * size: [OUT] the size of the GTK expander, size = width = height. + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_get_treeview_expander_size(gint* size); + +/** + * Get the desired size of a splitter + * orientation: [IN] GTK_ORIENTATION_HORIZONTAL or GTK_ORIENTATION_VERTICAL + * size: [OUT] width or height of the splitter handle + * + * returns: MOZ_GTK_SUCCESS if there was no error, an error code otherwise + */ +gint moz_gtk_splitter_get_metrics(gint orientation, gint* size); + +/** + * Get the YTHICKNESS of a tab (notebook extension). + */ +gint moz_gtk_get_tab_thickness(WidgetNodeType aNodeType); + +/** + * Get ToolbarButtonGTKMetrics for recent theme. + */ +const ToolbarButtonGTKMetrics* GetToolbarButtonMetrics( + WidgetNodeType aAppearance); + +/** + * Get toolbar button layout. + * aButtonLayout: [OUT] An array which will be filled by ButtonLayout + * references to visible titlebar buttons. Must contain at + * least TOOLBAR_BUTTONS entries if non-empty. + * aReversedButtonsPlacement: [OUT] True if the buttons are placed in opposite + * titlebar corner. + * + * returns: Number of returned entries at aButtonLayout. + */ +size_t GetGtkHeaderBarButtonLayout(mozilla::Span<ButtonLayout>, + bool* aReversedButtonsPlacement); + +/** + * Get size of CSD window extents. + * + * aIsPopup: [IN] Get decoration size for popup or toplevel window. + * + * returns: Calculated (or estimated) decoration size of given aGtkWindow. + */ +GtkBorder GetCSDDecorationSize(bool aIsPopup); + +#endif |