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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 */ 00147 if (con->proportional_height != 0 && 00148 con->proportional_width != 0) { 00149 double new_height = inset->height + 1; 00150 int new_width = inset->width; 00151 00152 while (new_height > inset->height) { 00153 new_height = ((double)con->proportional_height / con->proportional_width) * new_width; 00154 00155 if (new_height > inset->height) 00156 new_width--; 00157 } 00158 /* Center the window */ 00159 inset->y += ceil(inset->height / 2) - floor(new_height / 2); 00160 inset->x += ceil(inset->width / 2) - floor(new_width / 2); 00161 00162 inset->height = new_height; 00163 inset->width = new_width; 00164 } 00165 00166 if (con->height_increment > 1) { 00167 int old_height = inset->height; 00168 inset->height -= (inset->height - con->base_height) % con->height_increment; 00169 DLOG("Lost %d pixel due to client's height_increment (%d px, base_height = %d)\n", 00170 old_height - inset->height, con->height_increment, con->base_height); 00171 } 00172 00173 if (con->width_increment > 1) { 00174 int old_width = inset->width; 00175 inset->width -= (inset->width - con->base_width) % con->width_increment; 00176 DLOG("Lost %d pixel due to client's width_increment (%d px, base_width = %d)\n", 00177 old_width - inset->width, con->width_increment, con->base_width); 00178 } 00179 00180 DLOG("child will be at %dx%d with size %dx%d\n", inset->x, inset->y, inset->width, inset->height); 00181 } 00182 00183 /* Check for fullscreen nodes */ 00184 Con *fullscreen = NULL; 00185 if (con->type != CT_OUTPUT) { 00186 fullscreen = con_get_fullscreen_con(con, (con->type == CT_ROOT ? CF_GLOBAL : CF_OUTPUT)); 00187 } 00188 if (fullscreen) { 00189 fullscreen->rect = rect; 00190 x_raise_con(fullscreen); 00191 render_con(fullscreen, true); 00192 return; 00193 } 00194 00195 /* find the height for the decorations */ 00196 int deco_height = config.font.height + 5; 00197 00198 /* precalculate the sizes to be able to correct rounding errors */ 00199 int sizes[children]; 00200 if (con->layout == L_DEFAULT && children > 0) { 00201 assert(!TAILQ_EMPTY(&con->nodes_head)); 00202 Con *child; 00203 int i = 0, assigned = 0; 00204 int total = con->orientation == HORIZ ? rect.width : rect.height; 00205 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00206 double percentage = child->percent > 0.0 ? child->percent : 1.0 / children; 00207 assigned += sizes[i++] = percentage * total; 00208 } 00209 assert(assigned == total || 00210 (assigned > total && assigned - total <= children * 2) || 00211 (assigned < total && total - assigned <= children * 2)); 00212 int signal = assigned < total ? 1 : -1; 00213 while (assigned != total) { 00214 for (i = 0; i < children && assigned != total; ++i) { 00215 sizes[i] += signal; 00216 assigned += signal; 00217 } 00218 } 00219 } 00220 00221 if (con->layout == L_OUTPUT) { 00222 render_l_output(con); 00223 } else if (con->type == CT_ROOT) { 00224 Con *output; 00225 TAILQ_FOREACH(output, &(con->nodes_head), nodes) { 00226 render_con(output, false); 00227 } 00228 00229 /* We need to render floating windows after rendering all outputs’ 00230 * tiling windows because they need to be on top of *every* output at 00231 * all times. This is important when the user places floating 00232 * windows/containers so that they overlap on another output. */ 00233 DLOG("Rendering floating windows:\n"); 00234 TAILQ_FOREACH(output, &(con->nodes_head), nodes) { 00235 /* Get the active workspace of that output */ 00236 Con *content = output_get_content(output); 00237 Con *workspace = TAILQ_FIRST(&(content->focus_head)); 00238 00239 /* Check for (floating!) fullscreen nodes */ 00240 /* XXX: This code duplication is unfortunate. Keep in mind to fix 00241 * this when we clean up the whole render.c */ 00242 Con *fullscreen = NULL; 00243 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT); 00244 if (fullscreen) { 00245 /* Either the fullscreen window is inside the floating 00246 * container, then we need to render and raise it now… */ 00247 if (con_inside_floating(fullscreen)) { 00248 fullscreen->rect = output->rect; 00249 x_raise_con(fullscreen); 00250 render_con(fullscreen, true); 00251 continue; 00252 } else { 00253 /* …or it’s a tiling window, in which case the floating 00254 * windows should not overlap it, so we skip rendering this 00255 * output. */ 00256 continue; 00257 } 00258 } 00259 00260 Con *child; 00261 TAILQ_FOREACH(child, &(workspace->floating_head), floating_windows) { 00262 DLOG("floating child at (%d,%d) with %d x %d\n", child->rect.x, child->rect.y, child->rect.width, child->rect.height); 00263 x_raise_con(child); 00264 render_con(child, false); 00265 } 00266 } 00267 00268 } else { 00269 00270 /* FIXME: refactor this into separate functions: */ 00271 Con *child; 00272 TAILQ_FOREACH(child, &(con->nodes_head), nodes) { 00273 assert(children > 0); 00274 00275 /* default layout */ 00276 if (con->layout == L_DEFAULT) { 00277 if (con->orientation == HORIZ) { 00278 child->rect.x = x; 00279 child->rect.y = y; 00280 child->rect.width = sizes[i]; 00281 child->rect.height = rect.height; 00282 x += child->rect.width; 00283 } else { 00284 child->rect.x = x; 00285 child->rect.y = y; 00286 child->rect.width = rect.width; 00287 child->rect.height = sizes[i]; 00288 y += child->rect.height; 00289 } 00290 00291 /* first we have the decoration, if this is a leaf node */ 00292 if (con_is_leaf(child) && child->border_style == BS_NORMAL) { 00293 /* TODO: make a function for relative coords? */ 00294 child->deco_rect.x = child->rect.x - con->rect.x; 00295 child->deco_rect.y = child->rect.y - con->rect.y; 00296 00297 child->rect.y += deco_height; 00298 child->rect.height -= deco_height; 00299 00300 child->deco_rect.width = child->rect.width; 00301 child->deco_rect.height = deco_height; 00302 } 00303 } 00304 00305 /* stacked layout */ 00306 else if (con->layout == L_STACKED) { 00307 child->rect.x = x; 00308 child->rect.y = y; 00309 child->rect.width = rect.width; 00310 child->rect.height = rect.height; 00311 00312 child->deco_rect.x = x - con->rect.x; 00313 child->deco_rect.y = y - con->rect.y + (i * deco_height); 00314 child->deco_rect.width = child->rect.width; 00315 child->deco_rect.height = deco_height; 00316 00317 if (children > 1 || (child->border_style != BS_1PIXEL && child->border_style != BS_NONE)) { 00318 child->rect.y += (deco_height * children); 00319 child->rect.height -= (deco_height * children); 00320 } 00321 } 00322 00323 /* tabbed layout */ 00324 else if (con->layout == L_TABBED) { 00325 child->rect.x = x; 00326 child->rect.y = y; 00327 child->rect.width = rect.width; 00328 child->rect.height = rect.height; 00329 00330 child->deco_rect.width = child->rect.width / children; 00331 child->deco_rect.height = deco_height; 00332 child->deco_rect.x = x - con->rect.x + i * child->deco_rect.width; 00333 child->deco_rect.y = y - con->rect.y; 00334 00335 if (children > 1 || (child->border_style != BS_1PIXEL && child->border_style != BS_NONE)) { 00336 child->rect.y += deco_height; 00337 child->rect.height -= deco_height; 00338 } 00339 } 00340 00341 /* dockarea layout */ 00342 else if (con->layout == L_DOCKAREA) { 00343 child->rect.x = x; 00344 child->rect.y = y; 00345 child->rect.width = rect.width; 00346 child->rect.height = child->geometry.height; 00347 00348 child->deco_rect.x = 0; 00349 child->deco_rect.y = 0; 00350 child->deco_rect.width = 0; 00351 child->deco_rect.height = 0; 00352 y += child->rect.height; 00353 } 00354 00355 DLOG("child at (%d, %d) with (%d x %d)\n", 00356 child->rect.x, child->rect.y, child->rect.width, child->rect.height); 00357 x_raise_con(child); 00358 render_con(child, false); 00359 i++; 00360 } 00361 00362 /* in a stacking or tabbed container, we ensure the focused client is raised */ 00363 if (con->layout == L_STACKED || con->layout == L_TABBED) { 00364 TAILQ_FOREACH_REVERSE(child, &(con->focus_head), focus_head, focused) 00365 x_raise_con(child); 00366 if ((child = TAILQ_FIRST(&(con->focus_head)))) { 00367 /* By rendering the stacked container again, we handle the case 00368 * that we have a non-leaf-container inside the stack. In that 00369 * case, the children of the non-leaf-container need to be raised 00370 * aswell. */ 00371 render_con(child, false); 00372 } 00373 00374 if (children != 1) 00375 /* Raise the stack con itself. This will put the stack decoration on 00376 * top of every stack window. That way, when a new window is opened in 00377 * the stack, the old window will not obscure part of the decoration 00378 * (it’s unmapped afterwards). */ 00379 x_raise_con(con); 00380 } 00381 } 00382 }