From 460902abc1d5b34c6ea4c9492369533d3ec216d9 Mon Sep 17 00:00:00 2001 From: Thierry Lorthiois Date: Wed, 14 Mar 2012 05:15:23 +0000 Subject: [PATCH] Drag and drop support for launchers --- src/server.c | 7 ++ src/server.h | 7 ++ src/tint.c | 314 ++++++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 324 insertions(+), 4 deletions(-) diff --git a/src/server.c b/src/server.c index 46fd8a1..f65739a 100644 --- a/src/server.c +++ b/src/server.c @@ -99,9 +99,16 @@ void server_init_atoms () // drag 'n' drop server.atom.XdndAware = XInternAtom(server.dsp, "XdndAware", False); + server.atom.XdndEnter = XInternAtom(server.dsp, "XdndEnter", False); server.atom.XdndPosition = XInternAtom(server.dsp, "XdndPosition", False); server.atom.XdndStatus = XInternAtom(server.dsp, "XdndStatus", False); + server.atom.XdndDrop = XInternAtom(server.dsp, "XdndDrop", False); server.atom.XdndLeave = XInternAtom(server.dsp, "XdndLeave", False); + server.atom.XdndSelection = XInternAtom(server.dsp, "XdndSelection", False); + server.atom.XdndTypeList = XInternAtom(server.dsp, "XdndTypeList", False); + server.atom.XdndActionCopy = XInternAtom(server.dsp, "XdndActionCopy", False); + server.atom.XdndFinished = XInternAtom(server.dsp, "XdndFinished", False); + server.atom.TARGETS = XInternAtom(server.dsp, "TARGETS", False); } diff --git a/src/server.h b/src/server.h index da11b1d..7a725a8 100644 --- a/src/server.h +++ b/src/server.h @@ -71,9 +71,16 @@ typedef struct Global_atom Atom _XSETTINGS_SCREEN; Atom _XSETTINGS_SETTINGS; Atom XdndAware; + Atom XdndEnter; Atom XdndPosition; Atom XdndStatus; + Atom XdndDrop; Atom XdndLeave; + Atom XdndSelection; + Atom XdndTypeList; + Atom XdndActionCopy; + Atom XdndFinished; + Atom TARGETS; } Global_atom; diff --git a/src/tint.c b/src/tint.c index 5c96d54..cfd24bb 100644 --- a/src/tint.c +++ b/src/tint.c @@ -44,6 +44,14 @@ #include "timer.h" #include "xsettings-client.h" +// Drag and Drop state variables +Window dnd_source_window; +Window dnd_target_window; +int dnd_version; +Atom dnd_selection; +Atom dnd_atom; +int dnd_sent_request; +char *dnd_launcher_exec; void signal_handler(int sig) { @@ -724,9 +732,150 @@ void event_configure_notify (Window win) } } +char *GetAtomName(Display* disp, Atom a) +{ + if (a == None) + return "None"; + else + return XGetAtomName(disp, a); +} + +typedef struct Property +{ + unsigned char *data; + int format, nitems; + Atom type; +} Property; + +//This fetches all the data from a property +struct Property read_property(Display* disp, Window w, Atom property) +{ + Atom actual_type; + int actual_format; + unsigned long nitems; + unsigned long bytes_after; + unsigned char *ret=0; + + int read_bytes = 1024; + + //Keep trying to read the property until there are no + //bytes unread. + do { + if (ret != 0) + XFree(ret); + XGetWindowProperty(disp, w, property, 0, read_bytes, False, AnyPropertyType, + &actual_type, &actual_format, &nitems, &bytes_after, + &ret); + read_bytes *= 2; + } while (bytes_after != 0); + + fprintf(stderr, "DnD %s:%d: Property:\n", __FILE__, __LINE__); + fprintf(stderr, "DnD %s:%d: Actual type: %s\n", __FILE__, __LINE__, GetAtomName(disp, actual_type)); + fprintf(stderr, "DnD %s:%d: Actual format: %d\n", __FILE__, __LINE__, actual_format); + fprintf(stderr, "DnD %s:%d: Number of items: %lu\n", __FILE__, __LINE__, nitems); + + Property p; + p.data = ret; + p.format = actual_format; + p.nitems = nitems; + p.type = actual_type; + + return p; +} + +// This function takes a list of targets which can be converted to (atom_list, nitems) +// and a list of acceptable targets with prioritees (datatypes). It returns the highest +// entry in datatypes which is also in atom_list: ie it finds the best match. +Atom pick_target_from_list(Display* disp, Atom* atom_list, int nitems) +{ + Atom to_be_requested = None; + int i; + for (i = 0; i < nitems; i++) { + char *atom_name = GetAtomName(disp, atom_list[i]); + fprintf(stderr, "DnD %s:%d: Type %d = %s\n", __FILE__, __LINE__, i, atom_name); + + //See if this data type is allowed and of higher priority (closer to zero) + //than the present one. + if (strcmp(atom_name, "STRING") == 0) { + to_be_requested = atom_list[i]; + } + } + + return to_be_requested; +} + +// Finds the best target given up to three atoms provided (any can be None). +// Useful for part of the Xdnd protocol. +Atom pick_target_from_atoms(Display* disp, Atom t1, Atom t2, Atom t3) +{ + Atom atoms[3]; + int n = 0; + + if (t1 != None) + atoms[n++] = t1; + + if (t2 != None) + atoms[n++] = t2; + + if (t3 != None) + atoms[n++] = t3; + + return pick_target_from_list(disp, atoms, n); +} + +// Finds the best target given a local copy of a property. +Atom pick_target_from_targets(Display* disp, Property p) +{ + //The list of targets is a list of atoms, so it should have type XA_ATOM + //but it may have the type TARGETS instead. + + if ((p.type != XA_ATOM && p.type != server.atom.TARGETS) || p.format != 32) { + //This would be really broken. Targets have to be an atom list + //and applications should support this. Nevertheless, some + //seem broken (MATLAB 7, for instance), so ask for STRING + //next instead as the lowest common denominator + return XA_STRING; + } else { + Atom *atom_list = (Atom*)p.data; + + return pick_target_from_list(disp, atom_list, p.nitems); + } +} -void dnd_message(XClientMessageEvent *e) +void dnd_enter(XClientMessageEvent *e) { + dnd_atom = None; + int more_than_3 = e->data.l[1] & 1; + dnd_source_window = e->data.l[0]; + dnd_version = (e->data.l[1] >> 24); + + fprintf(stderr, "DnD %s:%d: DnDEnter\n", __FILE__, __LINE__); + fprintf(stderr, "DnD %s:%d: DnDEnter. Supports > 3 types = %s\n", __FILE__, __LINE__, more_than_3 ? "yes" : "no"); + fprintf(stderr, "DnD %s:%d: Protocol version = %d\n", __FILE__, __LINE__, dnd_version); + fprintf(stderr, "DnD %s:%d: Type 1 = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, e->data.l[2])); + fprintf(stderr, "DnD %s:%d: Type 2 = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, e->data.l[3])); + fprintf(stderr, "DnD %s:%d: Type 3 = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, e->data.l[4])); + + //Query which conversions are available and pick the best + + if (more_than_3) { + //Fetch the list of possible conversions + //Notice the similarity to TARGETS with paste. + Property p = read_property(server.dsp, dnd_source_window, server.atom.XdndTypeList); + dnd_atom = pick_target_from_targets(server.dsp, p); + XFree(p.data); + } else { + //Use the available list + dnd_atom = pick_target_from_atoms(server.dsp, e->data.l[2], e->data.l[3], e->data.l[4]); + } + + fprintf(stderr, "DnD %s:%d: Requested type = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, dnd_atom)); +} + +void dnd_position(XClientMessageEvent *e) +{ + dnd_target_window = e->window; + int accept = 0; Panel *panel = get_panel(e->window); int x, y, mapX, mapY; Window child; @@ -738,6 +887,14 @@ void dnd_message(XClientMessageEvent *e) if (task->desktop != server.desktop ) set_desktop (task->desktop); window_action(task, TOGGLE); + } else { + LauncherIcon *icon = click_launcher_icon(panel, mapX, mapY); + if (icon) { + accept = 1; + dnd_launcher_exec = icon->cmd; + } else { + dnd_launcher_exec = 0; + } } // send XdndStatus event to get more XdndPosition events @@ -747,13 +904,42 @@ void dnd_message(XClientMessageEvent *e) se.message_type = server.atom.XdndStatus; se.format = 32; se.data.l[0] = e->window; // XID of the target window - se.data.l[1] = 0; // bit 0: accept drop bit 1: send XdndPosition events if inside rectangle + se.data.l[1] = accept ? 1 : 0; // bit 0: accept drop bit 1: send XdndPosition events if inside rectangle se.data.l[2] = 0; // Rectangle x,y for which no more XdndPosition events se.data.l[3] = (1 << 16) | 1; // Rectangle w,h for which no more XdndPosition events - se.data.l[4] = None; // None = drop will not be accepted + if (accept) { + se.data.l[4] = dnd_version >= 2 ? e->data.l[4] : server.atom.XdndActionCopy; + } else { + se.data.l[4] = None; // None = drop will not be accepted + } + XSendEvent(server.dsp, e->data.l[0], False, NoEventMask, (XEvent*)&se); } +void dnd_drop(XClientMessageEvent *e) +{ + if (dnd_target_window && dnd_launcher_exec) { + if (dnd_version >= 1) { + XConvertSelection(server.dsp, server.atom.XdndSelection, XA_STRING, dnd_selection, dnd_target_window, e->data.l[2]); + } else { + XConvertSelection(server.dsp, server.atom.XdndSelection, XA_STRING, dnd_selection, dnd_target_window, CurrentTime); + } + } else { + //The source is sending anyway, despite instructions to the contrary. + //So reply that we're not interested. + XClientMessageEvent m; + memset(&m, sizeof(m), 0); + m.type = ClientMessage; + m.display = e->display; + m.window = e->data.l[0]; + m.message_type = server.atom.XdndFinished; + m.format = 32; + m.data.l[0] = dnd_target_window; + m.data.l[1] = 0; + m.data.l[2] = None; //Failed. + XSendEvent(server.dsp, e->data.l[0], False, NoEventMask, (XEvent*)&m); + } +} int main (int argc, char *argv[]) { @@ -793,6 +979,15 @@ start: x11_fd = ConnectionNumber(server.dsp); XSync(server.dsp, False); + // XDND initialization + dnd_source_window = 0; + dnd_target_window = 0; + dnd_version = 0; + dnd_selection = XInternAtom(server.dsp, "PRIMARY", 0); + dnd_atom = None; + dnd_sent_request = 0; + dnd_launcher_exec = 0; + // sigset_t empty_mask; // sigemptyset(&empty_mask); @@ -939,11 +1134,122 @@ start: if (systray_enabled && e.xclient.message_type == server.atom._NET_SYSTEM_TRAY_OPCODE && e.xclient.format == 32 && e.xclient.window == net_sel_win) { net_message(&e.xclient); } + else if (e.xclient.message_type == server.atom.XdndEnter) { + dnd_enter(&e.xclient); + } else if (e.xclient.message_type == server.atom.XdndPosition) { - dnd_message(&e.xclient); + dnd_position(&e.xclient); + } + else if (e.xclient.message_type == server.atom.XdndDrop) { + dnd_drop(&e.xclient); } break; + case SelectionNotify: + { + Atom target = e.xselection.target; + + fprintf(stderr, "DnD %s:%d: A selection notify has arrived!\n", __FILE__, __LINE__); + fprintf(stderr, "DnD %s:%d: Requestor = %lu\n", __FILE__, __LINE__, e.xselectionrequest.requestor); + fprintf(stderr, "DnD %s:%d: Selection atom = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, e.xselection.selection)); + fprintf(stderr, "DnD %s:%d: Target atom = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, target)); + fprintf(stderr, "DnD %s:%d: Property atom = %s\n", __FILE__, __LINE__, GetAtomName(server.dsp, e.xselection.property)); + + if (e.xselection.property != None && dnd_launcher_exec) { + Property prop = read_property(server.dsp, dnd_target_window, dnd_selection); + + //If we're being given a list of targets (possible conversions) + if (target == server.atom.TARGETS && !dnd_sent_request) { + dnd_sent_request = 1; + dnd_atom = pick_target_from_targets(server.dsp, prop); + + if (dnd_atom == None) { + fprintf(stderr, "No matching datatypes.\n"); + } else { + //Request the data type we are able to select + fprintf(stderr, "Now requsting type %s", GetAtomName(server.dsp, dnd_atom)); + XConvertSelection(server.dsp, dnd_selection, dnd_atom, dnd_selection, dnd_target_window, CurrentTime); + } + } else if (target == dnd_atom) { + //Dump the binary data + fprintf(stderr, "DnD %s:%d: Data begins:\n", __FILE__, __LINE__); + fprintf(stderr, "--------\n"); + int i; + for (i = 0; i < prop.nitems * prop.format/8; i++) + fprintf(stderr, "%c", ((char*)prop.data)[i]); + fprintf(stderr, "--------\n"); + + int cmd_length = 0; + cmd_length += 1; // ( + cmd_length += strlen(dnd_launcher_exec) + 1; // exec + space + cmd_length += 1; // open double quotes + for (i = 0; i < prop.nitems * prop.format/8; i++) { + char c = ((char*)prop.data)[i]; + if (c == '\n') { + if (i < prop.nitems * prop.format/8 - 1) { + cmd_length += 3; // close double quotes, space, open double quotes + } + } else if (c == '\r') { + } else { + cmd_length += 1; // 1 character + if (c == '`' || c == '$' || c == '\\') { + cmd_length += 1; // escape with one backslash + } + } + } + cmd_length += 1; // close double quotes + cmd_length += 2; // &) + cmd_length += 1; // terminator + + char *cmd = malloc(cmd_length); + cmd[0] = '\0'; + strcat(cmd, "("); + strcat(cmd, dnd_launcher_exec); + strcat(cmd, " \""); + for (i = 0; i < prop.nitems * prop.format/8; i++) { + char c = ((char*)prop.data)[i]; + if (c == '\n') { + if (i < prop.nitems * prop.format/8 - 1) { + strcat(cmd, "\" \""); + } + } else if (c == '\r') { + } else { + if (c == '`' || c == '$' || c == '\\') { + strcat(cmd, "\\"); + } + char sc[2]; + sc[0] = c; + sc[1] = '\0'; + strcat(cmd, sc); + } + } + strcat(cmd, "\""); + strcat(cmd, "&)"); + fprintf(stderr, "DnD %s:%d: Running command: %s\n", __FILE__, __LINE__, cmd); + tint_exec(cmd); + free(cmd); + + // Reply OK. + XClientMessageEvent m; + memset(&m, sizeof(m), 0); + m.type = ClientMessage; + m.display = server.dsp; + m.window = dnd_source_window; + m.message_type = server.atom.XdndFinished; + m.format = 32; + m.data.l[0] = dnd_target_window; + m.data.l[1] = 1; + m.data.l[2] = server.atom.XdndActionCopy; //We only ever copy. + XSendEvent(server.dsp, dnd_source_window, False, NoEventMask, (XEvent*)&m); + XSync(server.dsp, False); + } + + XFree(prop.data); + } + + break; + } + default: if (e.type == XDamageNotify+damage_event) { // union needed to avoid strict-aliasing warnings by gcc -- 2.45.2