i3
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00001 /* 00002 * vim:ts=4:sw=4:expandtab 00003 * 00004 * i3 - an improved dynamic tiling window manager 00005 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE) 00006 * 00007 * render.c: Renders (determines position/sizes) the layout tree, updating the 00008 * various rects. Needs to be pushed to X11 (see x.c) to be visible. 00009 * 00010 */ 00011 #include "all.h" 00012 00013 /* change this to 'true' if you want to have additional borders around every 00014 * container (for debugging purposes) */ 00015 static bool show_debug_borders = false; 00016 00017 /* 00018 * Renders a container with layout L_OUTPUT. In this layout, all CT_DOCKAREAs 00019 * get the height of their content and the remaining CT_CON gets the rest. 00020 * 00021 */ 00022 static void render_l_output(Con *con) { 00023 Con *child, *dockchild; 00024 00025 int x = con->rect.x; 00026 int y = con->rect.y; 00027 int height = con->rect.height; 00028 00029 /* Find the content container and ensure that there is exactly one. Also 00030 * check for any non-CT_DOCKAREA clients. */ 00031 Con *content = NULL; 00032 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00033 if (child->type == CT_CON) { 00034 if (content != NULL) { 00035 DLOG("More than one CT_CON on output container\n"); 00036 assert(false); 00037 } 00038 content = child; 00039 } else if (child->type != CT_DOCKAREA) { 00040 DLOG("Child %p of type %d is inside the OUTPUT con\n", child, child->type); 00041 assert(false); 00042 } 00043 } 00044 00045 assert(content != NULL); 00046 00047 /* We need to find out if there is a fullscreen con on the current workspace 00048 * and take the short-cut to render it directly (the user does not want to 00049 * see the dockareas in that case) */ 00050 Con *ws = con_get_fullscreen_con(content, CF_OUTPUT); 00051 Con *fullscreen = con_get_fullscreen_con(ws, CF_OUTPUT); 00052 if (fullscreen) { 00053 fullscreen->rect = con->rect; 00054 x_raise_con(fullscreen); 00055 render_con(fullscreen, true); 00056 return; 00057 } 00058 00059 /* First pass: determine the height of all CT_DOCKAREAs (the sum of their 00060 * children) and figure out how many pixels we have left for the rest */ 00061 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00062 if (child->type != CT_DOCKAREA) 00063 continue; 00064 00065 child->rect.height = 0; 00066 TAILQ_FOREACH(dockchild, &(child->nodes_head), nodes) 00067 child->rect.height += dockchild->geometry.height; 00068 00069 height -= child->rect.height; 00070 } 00071 00072 /* Second pass: Set the widths/heights */ 00073 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00074 if (child->type == CT_CON) { 00075 child->rect.x = x; 00076 child->rect.y = y; 00077 child->rect.width = con->rect.width; 00078 child->rect.height = height; 00079 } 00080 00081 child->rect.x = x; 00082 child->rect.y = y; 00083 child->rect.width = con->rect.width; 00084 00085 child->deco_rect.x = 0; 00086 child->deco_rect.y = 0; 00087 child->deco_rect.width = 0; 00088 child->deco_rect.height = 0; 00089 00090 y += child->rect.height; 00091 00092 DLOG("child at (%d, %d) with (%d x %d)\n", 00093 child->rect.x, child->rect.y, child->rect.width, child->rect.height); 00094 x_raise_con(child); 00095 render_con(child, false); 00096 } 00097 } 00098 00099 /* 00100 * "Renders" the given container (and its children), meaning that all rects are 00101 * updated correctly. Note that this function does not call any xcb_* 00102 * functions, so the changes are completely done in memory only (and 00103 * side-effect free). As soon as you call x_push_changes(), the changes will be 00104 * updated in X11. 00105 * 00106 */ 00107 void render_con(Con *con, bool render_fullscreen) { 00108 int children = con_num_children(con); 00109 DLOG("Rendering %snode %p / %s / layout %d / children %d / orient %d\n", 00110 (render_fullscreen ? "fullscreen " : ""), con, con->name, con->layout, 00111 children, con->orientation); 00112 00113 /* Copy container rect, subtract container border */ 00114 /* This is the actually usable space inside this container for clients */ 00115 Rect rect = con->rect; 00116 00117 /* Display a border if this is a leaf node. For container nodes, we don’t 00118 * draw borders (except when in debug mode) */ 00119 if (show_debug_borders) { 00120 rect.x += 2; 00121 rect.y += 2; 00122 rect.width -= 2 * 2; 00123 rect.height -= 2 * 2; 00124 } 00125 00126 int x = rect.x; 00127 int y = rect.y; 00128 00129 int i = 0; 00130 00131 con->mapped = true; 00132 00133 /* if this container contains a window, set the coordinates */ 00134 if (con->window) { 00135 /* depending on the border style, the rect of the child window 00136 * needs to be smaller */ 00137 Rect *inset = &(con->window_rect); 00138 *inset = (Rect){0, 0, con->rect.width, con->rect.height}; 00139 if (!render_fullscreen) 00140 *inset = rect_add(*inset, con_border_style_rect(con)); 00141 00142 /* Obey x11 border */ 00143 inset->width -= (2 * con->border_width); 00144 inset->height -= (2 * con->border_width); 00145 00146 /* Obey the aspect ratio, if any, unless we are in fullscreen mode. 00147 * 00148 * The spec isn’t explicit on whether the aspect ratio hints should be 00149 * respected during fullscreen mode. Other WMs such as Openbox don’t do 00150 * that, and this post suggests that this is the correct way to do it: 00151 * http://mail.gnome.org/archives/wm-spec-list/2003-May/msg00007.html 00152 * 00153 * Ignoring aspect ratio during fullscreen was necessary to fix MPlayer 00154 * subtitle rendering, see http://bugs.i3wm.org/594 */ 00155 if (!render_fullscreen && 00156 con->proportional_height != 0 && 00157 con->proportional_width != 0) { 00158 double new_height = inset->height + 1; 00159 int new_width = inset->width; 00160 00161 while (new_height > inset->height) { 00162 new_height = ((double)con->proportional_height / con->proportional_width) * new_width; 00163 00164 if (new_height > inset->height) 00165 new_width--; 00166 } 00167 /* Center the window */ 00168 inset->y += ceil(inset->height / 2) - floor(new_height / 2); 00169 inset->x += ceil(inset->width / 2) - floor(new_width / 2); 00170 00171 inset->height = new_height; 00172 inset->width = new_width; 00173 } 00174 00175 if (con->height_increment > 1) { 00176 int old_height = inset->height; 00177 inset->height -= (inset->height - con->base_height) % con->height_increment; 00178 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n", 00179 old_height - inset->height, con->height_increment, con->base_height); 00180 } 00181 00182 if (con->width_increment > 1) { 00183 int old_width = inset->width; 00184 inset->width -= (inset->width - con->base_width) % con->width_increment; 00185 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n", 00186 old_width - inset->width, con->width_increment, con->base_width); 00187 } 00188 00189 DLOG("child will be at %dx%d with size %dx%d\n", inset->x, inset->y, inset->width, inset->height); 00190 } 00191 00192 /* Check for fullscreen nodes */ 00193 Con *fullscreen = NULL; 00194 if (con->type != CT_OUTPUT) { 00195 fullscreen = con_get_fullscreen_con(con, (con->type == CT_ROOT ? CF_GLOBAL : CF_OUTPUT)); 00196 } 00197 if (fullscreen) { 00198 fullscreen->rect = rect; 00199 x_raise_con(fullscreen); 00200 render_con(fullscreen, true); 00201 return; 00202 } 00203 00204 /* find the height for the decorations */ 00205 int deco_height = config.font.height + 4; 00206 if (config.font.height & 0x01) 00207 ++deco_height; 00208 00209 /* precalculate the sizes to be able to correct rounding errors */ 00210 int sizes[children]; 00211 if (con->layout == L_DEFAULT && children > 0) { 00212 assert(!TAILQ_EMPTY(&con->nodes_head)); 00213 Con *child; 00214 int i = 0, assigned = 0; 00215 int total = con->orientation == HORIZ ? rect.width : rect.height; 00216 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00217 double percentage = child->percent > 0.0 ? child->percent : 1.0 / children; 00218 assigned += sizes[i++] = percentage * total; 00219 } 00220 assert(assigned == total || 00221 (assigned > total && assigned - total <= children * 2) || 00222 (assigned < total && total - assigned <= children * 2)); 00223 int signal = assigned < total ? 1 : -1; 00224 while (assigned != total) { 00225 for (i = 0; i < children && assigned != total; ++i) { 00226 sizes[i] += signal; 00227 assigned += signal; 00228 } 00229 } 00230 } 00231 00232 if (con->layout == L_OUTPUT) { 00233 /* Skip i3-internal outputs */ 00234 if (con->name[0] == '_' && con->name[1] == '_') 00235 return; 00236 render_l_output(con); 00237 } else if (con->type == CT_ROOT) { 00238 Con *output; 00239 TAILQ_FOREACH(output, &(con->nodes_head), nodes) { 00240 render_con(output, false); 00241 } 00242 00243 /* We need to render floating windows after rendering all outputs’ 00244 * tiling windows because they need to be on top of *every* output at 00245 * all times. This is important when the user places floating 00246 * windows/containers so that they overlap on another output. */ 00247 DLOG("Rendering floating windows:\n"); 00248 TAILQ_FOREACH(output, &(con->nodes_head), nodes) { 00249 if (output->name[0] == '_' && output->name[1] == '_') 00250 continue; 00251 /* Get the active workspace of that output */ 00252 Con *content = output_get_content(output); 00253 Con *workspace = TAILQ_FIRST(&(content->focus_head)); 00254 00255 /* Check for (floating!) fullscreen nodes */ 00256 /* XXX: This code duplication is unfortunate. Keep in mind to fix 00257 * this when we clean up the whole render.c */ 00258 Con *fullscreen = NULL; 00259 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT); 00260 if (fullscreen) { 00261 /* Either the fullscreen window is inside the floating 00262 * container, then we need to render and raise it now… */ 00263 if (con_inside_floating(fullscreen)) { 00264 fullscreen->rect = output->rect; 00265 x_raise_con(fullscreen); 00266 render_con(fullscreen, true); 00267 continue; 00268 } else { 00269 /* …or it’s a tiling window, in which case the floating 00270 * windows should not overlap it, so we skip rendering this 00271 * output. */ 00272 continue; 00273 } 00274 } 00275 00276 Con *child; 00277 TAILQ_FOREACH(child, &(workspace->floating_head), floating_windows) { 00278 DLOG("floating child at (%d,%d) with %d x %d\n", child->rect.x, child->rect.y, child->rect.width, child->rect.height); 00279 x_raise_con(child); 00280 render_con(child, false); 00281 } 00282 } 00283 00284 } else { 00285 00286 /* FIXME: refactor this into separate functions: */ 00287 Con *child; 00288 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00289 assert(children > 0); 00290 00291 /* default layout */ 00292 if (con->layout == L_DEFAULT) { 00293 if (con->orientation == HORIZ) { 00294 child->rect.x = x; 00295 child->rect.y = y; 00296 child->rect.width = sizes[i]; 00297 child->rect.height = rect.height; 00298 x += child->rect.width; 00299 } else { 00300 child->rect.x = x; 00301 child->rect.y = y; 00302 child->rect.width = rect.width; 00303 child->rect.height = sizes[i]; 00304 y += child->rect.height; 00305 } 00306 00307 /* first we have the decoration, if this is a leaf node */ 00308 if (con_is_leaf(child) && child->border_style == BS_NORMAL) { 00309 /* TODO: make a function for relative coords? */ 00310 child->deco_rect.x = child->rect.x - con->rect.x; 00311 child->deco_rect.y = child->rect.y - con->rect.y; 00312 00313 child->rect.y += deco_height; 00314 child->rect.height -= deco_height; 00315 00316 child->deco_rect.width = child->rect.width; 00317 child->deco_rect.height = deco_height; 00318 } 00319 } 00320 00321 /* stacked layout */ 00322 else if (con->layout == L_STACKED) { 00323 child->rect.x = x; 00324 child->rect.y = y; 00325 child->rect.width = rect.width; 00326 child->rect.height = rect.height; 00327 00328 child->deco_rect.x = x - con->rect.x; 00329 child->deco_rect.y = y - con->rect.y + (i * deco_height); 00330 child->deco_rect.width = child->rect.width; 00331 child->deco_rect.height = deco_height; 00332 00333 if (children > 1 || (child->border_style != BS_1PIXEL && child->border_style != BS_NONE)) { 00334 child->rect.y += (deco_height * children); 00335 child->rect.height -= (deco_height * children); 00336 } 00337 } 00338 00339 /* tabbed layout */ 00340 else if (con->layout == L_TABBED) { 00341 child->rect.x = x; 00342 child->rect.y = y; 00343 child->rect.width = rect.width; 00344 child->rect.height = rect.height; 00345 00346 child->deco_rect.width = child->rect.width / children; 00347 child->deco_rect.height = deco_height; 00348 child->deco_rect.x = x - con->rect.x + i * child->deco_rect.width; 00349 child->deco_rect.y = y - con->rect.y; 00350 00351 if (children > 1 || (child->border_style != BS_1PIXEL && child->border_style != BS_NONE)) { 00352 child->rect.y += deco_height; 00353 child->rect.height -= deco_height; 00354 } 00355 } 00356 00357 /* dockarea layout */ 00358 else if (con->layout == L_DOCKAREA) { 00359 child->rect.x = x; 00360 child->rect.y = y; 00361 child->rect.width = rect.width; 00362 child->rect.height = child->geometry.height; 00363 00364 child->deco_rect.x = 0; 00365 child->deco_rect.y = 0; 00366 child->deco_rect.width = 0; 00367 child->deco_rect.height = 0; 00368 y += child->rect.height; 00369 } 00370 00371 DLOG("child at (%d, %d) with (%d x %d)\n", 00372 child->rect.x, child->rect.y, child->rect.width, child->rect.height); 00373 x_raise_con(child); 00374 render_con(child, false); 00375 i++; 00376 } 00377 00378 /* in a stacking or tabbed container, we ensure the focused client is raised */ 00379 if (con->layout == L_STACKED || con->layout == L_TABBED) { 00380 TAILQ_FOREACH_REVERSE(child, &(con->focus_head), focus_head, focused) 00381 x_raise_con(child); 00382 if ((child = TAILQ_FIRST(&(con->focus_head)))) { 00383 /* By rendering the stacked container again, we handle the case 00384 * that we have a non-leaf-container inside the stack. In that 00385 * case, the children of the non-leaf-container need to be raised 00386 * aswell. */ 00387 render_con(child, false); 00388 } 00389 00390 if (children != 1) 00391 /* Raise the stack con itself. This will put the stack decoration on 00392 * top of every stack window. That way, when a new window is opened in 00393 * the stack, the old window will not obscure part of the decoration 00394 * (it’s unmapped afterwards). */ 00395 x_raise_con(con); 00396 } 00397 } 00398 }