Merge remote-tracking branch 'origin/master' into hidpi

1 files changed, 347 insertions, 0 deletions

diff --git a/examples/support/config.c b/examples/support/config.c
new file mode 100644
index 00000000..0ef025c0
--- /dev/null
+++ b/examples/support/config.c
@@ -0,0 +1,347 @@
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 200809L
+#endif
+#include <stdlib.h>
+#include <limits.h>
+#include <getopt.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <wlr/util/log.h>
+#include <wlr/types/wlr_box.h>
+#include "shared.h"
+#include "config.h"
+#include "ini.h"
+
+static void usage(const char *name, int ret) {
+	fprintf(stderr,
+		"usage: %s [-C <FILE>]\n"
+		"\n"
+		" -C <FILE>      Path to the configuration file\n"
+		"                (default: wlr-example.ini).\n"
+		"                See `rootston/rootston.ini.example` for config\n"
+		"                file documentation.\n", name);
+
+	exit(ret);
+}
+
+static struct wlr_box *parse_geometry(const char *str) {
+	// format: {width}x{height}+{x}+{y}
+	if (strlen(str) > 255) {
+		wlr_log(L_ERROR, "cannot parse geometry string, too long");
+		return NULL;
+	}
+
+	char *buf = strdup(str);
+	struct wlr_box *box = calloc(1, sizeof(struct wlr_box));
+
+	bool has_width = false;
+	bool has_height = false;
+	bool has_x = false;
+	bool has_y = false;
+
+	char *pch = strtok(buf, "x+");
+	while (pch != NULL) {
+		errno = 0;
+		char *endptr;
+		long val = strtol(pch, &endptr, 0);
+
+		if ((errno == ERANGE && (val == LONG_MAX || val == LONG_MIN)) ||
+				(errno != 0 && val == 0)) {
+			goto invalid_input;
+		}
+
+		if (endptr == pch) {
+			goto invalid_input;
+		}
+
+		if (!has_width) {
+			box->width = val;
+			has_width = true;
+		} else if (!has_height) {
+			box->height = val;
+			has_height = true;
+		} else if (!has_x) {
+			box->x = val;
+			has_x = true;
+		} else if (!has_y) {
+			box->y = val;
+			has_y = true;
+		} else {
+			break;
+		}
+		pch = strtok(NULL, "x+");
+	}
+
+	if (!has_width || !has_height) {
+		goto invalid_input;
+	}
+
+	free(buf);
+	return box;
+
+invalid_input:
+	wlr_log(L_ERROR, "could not parse geometry string: %s", str);
+	free(buf);
+	free(box);
+	return NULL;
+}
+
+static const char *output_prefix = "output:";
+static const char *device_prefix = "device:";
+
+static int config_ini_handler(void *user, const char *section, const char *name,
+		const char *value) {
+	struct example_config *config = user;
+	if (strncmp(output_prefix, section, strlen(output_prefix)) == 0) {
+		const char *output_name = section + strlen(output_prefix);
+		struct output_config *oc;
+		bool found = false;
+
+		wl_list_for_each(oc, &config->outputs, link) {
+			if (strcmp(oc->name, output_name) == 0) {
+				found = true;
+				break;
+			}
+		}
+
+		if (!found) {
+			oc = calloc(1, sizeof(struct output_config));
+			oc->name = strdup(output_name);
+			oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
+			wl_list_insert(&config->outputs, &oc->link);
+		}
+
+		if (strcmp(name, "x") == 0) {
+			oc->x = strtol(value, NULL, 10);
+		} else if (strcmp(name, "y") == 0) {
+			oc->y = strtol(value, NULL, 10);
+		} else if (strcmp(name, "rotate") == 0) {
+			if (strcmp(value, "90") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_90;
+			} else if (strcmp(value, "180") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_180;
+			} else if (strcmp(value, "270") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_270;
+			} else if (strcmp(value, "flipped") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED;
+			} else if (strcmp(value, "flipped-90") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED_90;
+			} else if (strcmp(value, "flipped-180") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED_180;
+			} else if (strcmp(value, "flipped-270") == 0) {
+				oc->transform = WL_OUTPUT_TRANSFORM_FLIPPED_270;
+			} else {
+				wlr_log(L_ERROR, "got unknown transform value: %s", value);
+			}
+		}
+	} else if (strcmp(section, "cursor") == 0) {
+		if (strcmp(name, "map-to-output") == 0) {
+			free(config->cursor.mapped_output);
+			config->cursor.mapped_output = strdup(value);
+		} else if (strcmp(name, "geometry") == 0) {
+			free(config->cursor.mapped_box);
+			config->cursor.mapped_box = parse_geometry(value);
+		} else {
+			wlr_log(L_ERROR, "got unknown cursor config: %s", name);
+		}
+	} else if (strncmp(device_prefix, section, strlen(device_prefix)) == 0) {
+		const char *device_name = section + strlen(device_prefix);
+		struct device_config *dc;
+		bool found = false;
+
+		wl_list_for_each(dc, &config->devices, link) {
+			if (strcmp(dc->name, device_name) == 0) {
+				found = true;
+				break;
+			}
+		}
+
+		if (!found) {
+			dc = calloc(1, sizeof(struct device_config));
+			dc->name = strdup(device_name);
+			wl_list_insert(&config->devices, &dc->link);
+		}
+
+		if (strcmp(name, "map-to-output") == 0) {
+			free(dc->mapped_output);
+			dc->mapped_output = strdup(value);
+		} else if (strcmp(name, "geometry") == 0) {
+			free(dc->mapped_box);
+			dc->mapped_box = parse_geometry(value);
+		} else {
+			wlr_log(L_ERROR, "got unknown device config: %s", name);
+		}
+	} else {
+		wlr_log(L_ERROR, "got unknown config section: %s", section);
+	}
+
+	return 1;
+}
+
+struct example_config *parse_args(int argc, char *argv[]) {
+	struct example_config *config = calloc(1, sizeof(struct example_config));
+	wl_list_init(&config->outputs);
+	wl_list_init(&config->devices);
+
+	int c;
+	while ((c = getopt(argc, argv, "C:h")) != -1) {
+		switch (c) {
+		case 'C':
+			config->config_path = strdup(optarg);
+			break;
+		case 'h':
+		case '?':
+			usage(argv[0], c != 'h');
+		}
+	}
+
+	if (!config->config_path) {
+		// get the config path from the current directory
+		char cwd[MAXPATHLEN];
+		if (getcwd(cwd, sizeof(cwd)) != NULL) {
+			char buf[MAXPATHLEN];
+			snprintf(buf, MAXPATHLEN, "%s/%s", cwd, "wlr-example.ini");
+			config->config_path = strdup(buf);
+		} else {
+			wlr_log(L_ERROR, "could not get cwd");
+			exit(1);
+		}
+	}
+
+	int result = ini_parse(config->config_path, config_ini_handler, config);
+
+	if (result == -1) {
+		wlr_log(L_DEBUG, "No config file found. Using empty config.");
+	} else if (result == -2) {
+		wlr_log(L_ERROR, "Could not allocate memory to parse config file");
+		exit(1);
+	} else if (result != 0) {
+		wlr_log(L_ERROR, "Could not parse config file");
+		exit(1);
+	}
+
+	return config;
+}
+
+void example_config_destroy(struct example_config *config) {
+	struct output_config *oc, *otmp = NULL;
+	wl_list_for_each_safe(oc, otmp, &config->outputs, link) {
+		free(oc->name);
+		free(oc);
+	}
+
+	struct device_config *dc, *dtmp = NULL;
+	wl_list_for_each_safe(dc, dtmp, &config->devices, link) {
+		free(dc->name);
+		if (dc->mapped_output) {
+			free(dc->mapped_output);
+		}
+		if (dc->mapped_box) {
+			free(dc->mapped_box);
+		}
+		free(dc);
+	}
+
+	if (config->config_path) {
+		free(config->config_path);
+	}
+	if (config->cursor.mapped_output) {
+		free(config->cursor.mapped_output);
+	}
+	if (config->cursor.mapped_box) {
+		free(config->cursor.mapped_box);
+	}
+	free(config);
+}
+
+struct output_config *example_config_get_output(struct example_config *config,
+		struct wlr_output *output) {
+	struct output_config *o_config;
+	wl_list_for_each(o_config, &config->outputs, link) {
+		if (strcmp(o_config->name, output->name) == 0) {
+			return o_config;
+		}
+	}
+
+	return NULL;
+}
+
+struct device_config *example_config_get_device(struct example_config *config,
+		struct wlr_input_device *device) {
+	struct device_config *d_config;
+	wl_list_for_each(d_config, &config->devices, link) {
+		if (strcmp(d_config->name, device->name) == 0) {
+			return d_config;
+		}
+	}
+
+	return NULL;
+}
+
+/**
+ * Set device output mappings to NULL and configure region mappings.
+ */
+static void reset_device_mappings(struct example_config *config,
+		struct wlr_cursor *cursor, struct wlr_input_device *device) {
+	struct device_config *d_config;
+	wlr_cursor_map_input_to_output(cursor, device, NULL);
+	d_config = example_config_get_device(config, device);
+	if (d_config) {
+		wlr_cursor_map_input_to_region(cursor, device,
+			d_config->mapped_box);
+	}
+}
+
+static void set_device_output_mappings(struct example_config *config,
+		struct wlr_cursor *cursor, struct wlr_output *output,
+		struct wlr_input_device *device) {
+	struct device_config *d_config;
+	d_config = example_config_get_device(config, device);
+	if (d_config &&
+			d_config->mapped_output &&
+			strcmp(d_config->mapped_output, output->name) == 0) {
+		wlr_cursor_map_input_to_output(cursor, device, output);
+	}
+}
+
+void example_config_configure_cursor(struct example_config *config,
+		struct wlr_cursor *cursor, struct compositor_state *compositor) {
+	struct pointer_state *p_state;
+	struct tablet_tool_state *tt_state;
+	struct touch_state *tch_state;
+	struct output_state *o_state;
+
+	// reset mappings
+	wlr_cursor_map_to_output(cursor, NULL);
+	wl_list_for_each(p_state, &compositor->pointers, link) {
+		reset_device_mappings(config, cursor, p_state->device);
+	}
+	wl_list_for_each(tt_state, &compositor->tablet_tools, link) {
+		reset_device_mappings(config, cursor, tt_state->device);
+	}
+	wl_list_for_each(tch_state, &compositor->touch, link) {
+		reset_device_mappings(config, cursor, tch_state->device);
+	}
+
+	// configure device to output mappings
+	char *mapped_output = config->cursor.mapped_output;
+	wl_list_for_each(o_state, &compositor->outputs, link) {
+		if (mapped_output && strcmp(mapped_output, o_state->output->name) == 0) {
+			wlr_cursor_map_to_output(cursor, o_state->output);
+		}
+
+		wl_list_for_each(p_state, &compositor->pointers, link) {
+			set_device_output_mappings(config, cursor, o_state->output,
+				p_state->device);
+		}
+		wl_list_for_each(tt_state, &compositor->tablet_tools, link) {
+			set_device_output_mappings(config, cursor, o_state->output,
+				tt_state->device);
+		}
+		wl_list_for_each(tch_state, &compositor->touch, link) {
+			set_device_output_mappings(config, cursor, o_state->output,
+				tch_state->device);
+		}
+	}
+}