InfoMagic Source Code 1993 July

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C/C++ Source or Header | 1993-06-11 | 17.1 KB | 454 lines

/* Define frame-object for GNU Emacs. Copyright (C) 1993 Free Software Foundation, Inc. This file is part of GNU Emacs. GNU Emacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Miscellanea. */ /* Nonzero means don't assume anything about current contents of actual terminal frame */ extern int frame_garbaged; /* Nonzero means FRAME_MESSAGE_BUF (selected_frame) is being used by print. */ extern int message_buf_print; /* The structure representing a frame. We declare this even if MULTI_FRAME is not defined, because when we lack multi-frame support, we use one instance of this structure to represent the one frame we support. This is cleaner than having miscellaneous random variables scattered about. */ enum output_method { output_termcap, output_x_window }; struct frame { int size; struct Lisp_Vector *next; /* glyphs as they appear on the frame */ struct frame_glyphs *current_glyphs; /* glyphs we'd like to appear on the frame */ struct frame_glyphs *desired_glyphs; /* See do_line_insertion_deletion_costs for info on these arrays. */ /* Cost of inserting 1 line on this frame */ int *insert_line_cost; /* Cost of deleting 1 line on this frame */ int *delete_line_cost; /* Cost of inserting n lines on this frame */ int *insert_n_lines_cost; /* Cost of deleting n lines on this frame */ int *delete_n_lines_cost; /* glyphs for the mode line */ struct frame_glyphs *temp_glyphs; /* Intended cursor position of this frame. Measured in characters, counting from upper left corner within the frame. */ int cursor_x; int cursor_y; /* Actual cursor position of this frame, and the character under it. (Not used for terminal frames.) */ int phys_cursor_x; int phys_cursor_y; /* This is handy for undrawing the cursor, because current_glyphs is not always accurate when in do_scrolling. */ GLYPH phys_cursor_glyph; /* Size of this frame, in units of characters. */ int height; int width; /* New height and width for pending size change. 0 if no change pending. */ int new_height, new_width; /* Name of this frame: a Lisp string. See also `explicit_name'. */ Lisp_Object name; /* The frame which should receive keystrokes that occur in this frame, or nil if they should go to the frame itself. This is usually nil, but if the frame is minibufferless, we can use this to redirect keystrokes to a surrogate minibuffer frame when needed. Note that a value of nil is different than having the field point to the frame itself. Whenever the Fselect_frame function is used to shift from one frame to the other, any redirections to the original frame are shifted to the newly selected frame; if focus_frame is nil, Fselect_frame will leave it alone. */ Lisp_Object focus_frame; /* This frame's root window. Every frame has one. If the frame has only a minibuffer window, this is it. Otherwise, if the frame has a minibuffer window, this is its sibling. */ Lisp_Object root_window; /* This frame's selected window. Each frame has its own window hierarchy and one of the windows in it is selected within the frame. The selected window of the selected frame is Emacs's selected window. */ Lisp_Object selected_window; /* This frame's minibuffer window. Most frames have their own minibuffer windows, but only the selected frame's minibuffer window can actually appear to exist. */ Lisp_Object minibuffer_window; /* Parameter alist of this frame. These are the parameters specified when creating the frame or modified with modify-frame-parameters. */ Lisp_Object param_alist; /* List of scroll bars on this frame. Actually, we don't specify exactly what is stored here at all; the scroll bar implementation code can use it to store anything it likes. This field is marked by the garbage collector. It is here instead of in the `display' structure so that the garbage collector doesn't need to look inside the window-system-dependent structure. */ Lisp_Object scroll_bars; Lisp_Object condemned_scroll_bars; /* List of elements to display in the menu bar. The elements have the form (KEY STRING . nil) to start; when they are displayed, the hpos of the left edge goes in the cddr. */ Lisp_Object menu_bar_items; /* Alist of elements (FACE-NAME . FACE-VECTOR-DATA). */ Lisp_Object face_alist; /* The output method says how the contents of this frame are displayed. It could be using termcap, or using an X window. */ enum output_method output_method; /* A structure of auxiliary data used for displaying the contents. struct x_display is used for X window frames; it is defined in xterm.h. */ union display { struct x_display *x; int nothing; } display; /* Number of lines of menu bar. */ int menu_bar_lines; /* Nonzero if last attempt at redisplay on this frame was preempted. */ char display_preempted; /* visible is nonzero if the frame is currently displayed; we check it to see if we should bother updating the frame's contents. DON'T SET IT DIRECTLY; instead, use FRAME_SET_VISIBLE. Note that, since invisible frames aren't updated, whenever a frame becomes visible again, it must be marked as garbaged. The FRAME_SAMPLE_VISIBILITY macro takes care of this. iconified is nonzero if the frame is currently iconified. Asynchronous input handlers should NOT change these directly; instead, they should change async_visible or async_iconified, and let the FRAME_SAMPLE_VISIBILITY macro set visible and iconified at the next redisplay. These should probably be considered read-only by everyone except FRAME_SAMPLE_VISIBILITY. This two are mutually exclusive. They might both be zero, if the frame has been made invisible without an icon. */ char visible, iconified; /* Asynchronous input handlers change these, and FRAME_SAMPLE_VISIBILITY copies them into visible and iconified. See FRAME_SAMPLE_VISIBILITY, below. */ #ifdef __STDC__ volatile #endif char async_visible, async_iconified; /* Nonzero if this frame should be redrawn. */ #ifdef __STDC__ volatile #endif char garbaged; /* True if frame actually has a minibuffer window on it. 0 if using a minibuffer window that isn't on this frame. */ char has_minibuffer; /* 0 means, if this frame has just one window, show no modeline for that window. */ char wants_modeline; /* Non-zero if the hardware device this frame is displaying on can support scroll bars. */ char can_have_scroll_bars; /* If can_have_scroll_bars is non-zero, this is non-zero if we should actually display them on this frame. */ char has_vertical_scroll_bars; /* Non-0 means raise this frame to the top of the heap when selected. */ char auto_raise; /* Non-0 means lower this frame to the bottom of the stack when left. */ char auto_lower; /* True if frame's root window can't be split. */ char no_split; /* If this is set, then Emacs won't change the frame name to indicate the current buffer, etcetera. If the user explicitly sets the frame name, this gets set. If the user sets the name to Qnil, this is cleared. */ char explicit_name; /* Storage for messages to this frame. */ char *message_buf; /* Nonnegative if current redisplay should not do scroll computation for lines beyond a certain vpos. This is the vpos. */ int scroll_bottom_vpos; }; #ifdef MULTI_FRAME typedef struct frame *FRAME_PTR; #define XFRAME(p) ((struct frame *) XPNTR (p)) #define XSETFRAME(p, v) ((struct frame *) XSETPNTR (p, v)) #define WINDOW_FRAME(w) (w)->frame #define FRAME_LIVE_P(f) ((f)->display.nothing != 0) #define FRAME_TERMCAP_P(f) ((f)->output_method == output_termcap) #define FRAME_X_P(f) ((f)->output_method == output_x_window) #define FRAME_MINIBUF_ONLY_P(f) \ EQ (FRAME_ROOT_WINDOW (f), FRAME_MINIBUF_WINDOW (f)) #define FRAME_HAS_MINIBUF_P(f) ((f)->has_minibuffer) #define FRAME_CURRENT_GLYPHS(f) (f)->current_glyphs #define FRAME_DESIRED_GLYPHS(f) (f)->desired_glyphs #define FRAME_TEMP_GLYPHS(f) (f)->temp_glyphs #define FRAME_HEIGHT(f) (f)->height #define FRAME_WIDTH(f) (f)->width #define FRAME_NEW_HEIGHT(f) (f)->new_height #define FRAME_NEW_WIDTH(f) (f)->new_width #define FRAME_MENU_BAR_LINES(f) (f)->menu_bar_lines #define FRAME_CURSOR_X(f) (f)->cursor_x #define FRAME_CURSOR_Y(f) (f)->cursor_y #define FRAME_VISIBLE_P(f) ((f)->visible != 0) #define FRAME_SET_VISIBLE(f,p) \ ((f)->async_visible = (p), FRAME_SAMPLE_VISIBILITY (f)) #define SET_FRAME_GARBAGED(f) (frame_garbaged = 1, f->garbaged = 1) #define FRAME_GARBAGED_P(f) (f)->garbaged #define FRAME_NO_SPLIT_P(f) (f)->no_split #define FRAME_WANTS_MODELINE_P(f) (f)->wants_modeline #define FRAME_ICONIFIED_P(f) (f)->iconified #define FRAME_MINIBUF_WINDOW(f) (f)->minibuffer_window #define FRAME_ROOT_WINDOW(f) (f)->root_window #define FRAME_SELECTED_WINDOW(f) (f)->selected_window #define SET_GLYPHS_FRAME(glyphs,frame) ((glyphs)->frame = (frame)) #define FRAME_INSERT_COST(f) (f)->insert_line_cost #define FRAME_DELETE_COST(f) (f)->delete_line_cost #define FRAME_INSERTN_COST(f) (f)->insert_n_lines_cost #define FRAME_DELETEN_COST(f) (f)->delete_n_lines_cost #define FRAME_MESSAGE_BUF(f) (f)->message_buf #define FRAME_SCROLL_BOTTOM_VPOS(f) (f)->scroll_bottom_vpos #define FRAME_FOCUS_FRAME(f) (f)->focus_frame #define FRAME_CAN_HAVE_SCROLL_BARS(f) ((f)->can_have_scroll_bars) #define FRAME_HAS_VERTICAL_SCROLL_BARS(f) ((f)->has_vertical_scroll_bars) #define FRAME_SCROLL_BARS(f) ((f)->scroll_bars) #define FRAME_CONDEMNED_SCROLL_BARS(f) ((f)->condemned_scroll_bars) #define FRAME_MENU_BAR_ITEMS(f) ((f)->menu_bar_items) /* Emacs's redisplay code could become confused if a frame's visibility changes at arbitrary times. For example, if a frame is visible while the desired glyphs are being built, but becomes invisible before they are updated, then some rows of the desired_glyphs will be left marked as enabled after redisplay is complete, which should never happen. The next time the frame becomes visible, redisplay will probably barf. Currently, there are no similar situations involving iconified, but the principle is the same. So instead of having asynchronous input handlers directly set and clear the frame's visibility and iconification flags, they just set the async_visible and async_iconified flags; the redisplay code calls the FRAME_SAMPLE_VISIBILITY macro before doing any redisplay, which sets visible and iconified from their asynchronous counterparts. Synchronous code must use the FRAME_SET_VISIBLE macro. Also, if a frame used to be invisible, but has just become visible, it must be marked as garbaged, since redisplay hasn't been keeping up its contents. */ #define FRAME_SAMPLE_VISIBILITY(f) \ (((f)->async_visible && ! (f)->visible) ? SET_FRAME_GARBAGED (f) : 0, \ (f)->visible = (f)->async_visible, \ (f)->iconified = (f)->async_iconified) #define CHECK_FRAME(x, i) \ { \ if (! FRAMEP (x)) \ x = wrong_type_argument (Qframep, (x)); \ } #define CHECK_LIVE_FRAME(x, i) \ { \ if (! FRAMEP (x) \ || ! FRAME_LIVE_P (XFRAME (x))) \ x = wrong_type_argument (Qframe_live_p, (x)); \ } /* FOR_EACH_FRAME (LIST_VAR, FRAME_VAR) followed by a statement is a `for' loop which iterates over the elements of Vframe_list. The loop will set FRAME_VAR, a Lisp_Object, to each frame in Vframe_list in succession and execute the statement. LIST_VAR should be a Lisp_Object too; it is used to iterate through the Vframe_list. If MULTI_FRAME isn't defined, then this loop expands to something which executes the statement once. */ #define FOR_EACH_FRAME(list_var, frame_var) \ for ((list_var) = Vframe_list; \ (CONSP (list_var) \ && (frame_var = XCONS (list_var)->car, 1)); \ list_var = XCONS (list_var)->cdr) extern Lisp_Object Qframep, Qframe_live_p, Qicon; extern struct frame *selected_frame; extern struct frame *last_nonminibuf_frame; extern struct frame *make_terminal_frame (); extern struct frame *make_frame (); extern struct frame *make_minibuffer_frame (); extern struct frame *make_frame_without_minibuffer (); extern Lisp_Object Vframe_list; extern Lisp_Object Vdefault_frame_alist; extern Lisp_Object Vterminal_frame; #else /* not MULTI_FRAME */ /* These definitions are used in a single-frame version of Emacs. */ #define FRAME_PTR int /* A frame we use to store all the data concerning the screen when we don't have multiple frames. Remember, if you store any data in it which needs to be protected from GC, you should staticpro that element explicitly. */ extern struct frame the_only_frame; extern int selected_frame; extern int last_nonminibuf_frame; #define XFRAME(f) selected_frame #define WINDOW_FRAME(w) selected_frame #define FRAME_LIVE_P(f) 1 #define FRAME_TERMCAP_P(f) 1 #define FRAME_X_P(f) 0 #define FRAME_MINIBUF_ONLY_P(f) 0 #define FRAME_HAS_MINIBUF_P(f) 1 #define FRAME_CURRENT_GLYPHS(f) (the_only_frame.current_glyphs) #define FRAME_DESIRED_GLYPHS(f) (the_only_frame.desired_glyphs) #define FRAME_TEMP_GLYPHS(f) (the_only_frame.temp_glyphs) #define FRAME_HEIGHT(f) (the_only_frame.height) #define FRAME_WIDTH(f) (the_only_frame.width) #define FRAME_NEW_HEIGHT(f) (the_only_frame.new_height) #define FRAME_NEW_WIDTH(f) (the_only_frame.new_width) #define FRAME_MENU_BAR_LINES(f) (the_only_frame.menu_bar_lines) #define FRAME_CURSOR_X(f) (the_only_frame.cursor_x) #define FRAME_CURSOR_Y(f) (the_only_frame.cursor_y) #define FRAME_SET_VISIBLE(f,p) (p) #define FRAME_VISIBLE_P(f) 1 #define SET_FRAME_GARBAGED(f) (frame_garbaged = 1) #define FRAME_GARBAGED_P(f) (frame_garbaged) #define FRAME_NO_SPLIT_P(f) 0 #define FRAME_WANTS_MODELINE_P(f) 1 #define FRAME_ICONIFIED_P(f) 0 #define FRAME_MINIBUF_WINDOW(f) (minibuf_window) #define FRAME_ROOT_WINDOW(f) (the_only_frame.root_window) #define FRAME_SELECTED_WINDOW(f) (selected_window) #define SET_GLYPHS_FRAME(glyphs,frame) do ; while (0) #define FRAME_INSERT_COST(frame) (the_only_frame.insert_line_cost) #define FRAME_DELETE_COST(frame) (the_only_frame.delete_line_cost) #define FRAME_INSERTN_COST(frame) (the_only_frame.insert_n_lines_cost) #define FRAME_DELETEN_COST(frame) (the_only_frame.delete_n_lines_cost) #define FRAME_MESSAGE_BUF(f) (the_only_frame.message_buf) #define FRAME_SCROLL_BOTTOM_VPOS(f) (the_only_frame.scroll_bottom_vpos) #define FRAME_FOCUS_FRAME(f) (Qnil) #define FRAME_CAN_HAVE_SCROLL_BARS(f) (the_only_frame.can_have_scroll_bars) #define FRAME_HAS_VERTICAL_SCROLL_BARS(f) \ (the_only_frame.has_vertical_scroll_bars) #define FRAME_SCROLL_BARS(f) (the_only_frame.scroll_bars) #define FRAME_CONDEMNED_SCROLL_BARS(f) (the_only_frame.condemned_scroll_bars) #define FRAME_MENU_BAR_ITEMS(f) (the_only_frame.menu_bar_items) /* See comments in definition above. */ #define FRAME_SAMPLE_VISIBILITY(f) (0) #define CHECK_FRAME(x, i) do; while (0) #define CHECK_LIVE_FRAME(x, y) do; while (0) /* FOR_EACH_FRAME (LIST_VAR, FRAME_VAR) followed by a statement is a `for' loop which iterates over the elements of Vframe_list. The loop will set FRAME_VAR, a Lisp_Object, to each frame in Vframe_list in succession and execute the statement. LIST_VAR should be a Lisp_Object too; it is used to iterate through the Vframe_list. If MULTI_FRAME _is_ defined, then this loop expands to a real `for' loop which traverses Vframe_list using LIST_VAR and FRAME_VAR. */ #define FOR_EACH_FRAME(list_var, frame_var) \ for (list_var = Qt; frame_var = selected_frame, ! NILP (list_var); list_var = Qnil) #endif /* not MULTI_FRAME */ /* Device- and MULTI_FRAME-independent scroll bar stuff. */ /* The number of columns a vertical scroll bar occupies. */ #define VERTICAL_SCROLL_BAR_WIDTH (2) /* Return the starting column (zero-based) of the vertical scroll bar for window W. The column before this one is the last column we can use for text. If the window touches the right edge of the frame, we have extra space allocated for it. Otherwise, the scroll bar takes over the window's rightmost columns. */ #define WINDOW_VERTICAL_SCROLL_BAR_COLUMN(w) \ (((XINT ((w)->left) + XINT ((w)->width)) \ < FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) \ ? XINT ((w)->left) + XINT ((w)->width) - VERTICAL_SCROLL_BAR_WIDTH \ : FRAME_WIDTH (XFRAME (WINDOW_FRAME (w)))) /* Return the height in lines of the vertical scroll bar in w. If the window has a mode line, don't make the scroll bar extend that far. */ #define WINDOW_VERTICAL_SCROLL_BAR_HEIGHT(w) (window_internal_height (w))